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• Problems with real-valued deep belief networks (of RBMs)

  - by Junier

  I am trying to recreate the results reported in Reducing the dimensionality of data with neural networks of autoencoding the olivetti face dataset with an adapted version of the MNIST digits matlab code, but am having some difficulty. It seems that no matter how much tweaking I do on the number of epochs, rates, or momentum the stacked RBMs are entering the fine-tuning stage with a large amount of error and consequently fail to improve much at the fine-tuning stage. I am also experiencing a similar problem on another real-valued dataset. For the first layer I am using a RBM with a smaller learning rate (as described in the paper) and with negdata = poshidstates*vishid' + repmat(visbiases,numcases,1); I'm fairly confident I am following the instructions found in the supporting material but I cannot achieve the correct errors. Is there something I am missing? See the code I'm using for real-valued visible unit RBMs below, and for the whole deep training. The rest of the code can be found here. rbmvislinear.m: epsilonw = 0.001; % Learning rate for weights epsilonvb = 0.001; % Learning rate for biases of visible units epsilonhb = 0.001; % Learning rate for biases of hidden units weightcost = 0.0002; initialmomentum = 0.5; finalmomentum = 0.9; [numcases numdims numbatches]=size(batchdata); if restart ==1, restart=0; epoch=1; % Initializing symmetric weights and biases. vishid = 0.1*randn(numdims, numhid); hidbiases = zeros(1,numhid); visbiases = zeros(1,numdims); poshidprobs = zeros(numcases,numhid); neghidprobs = zeros(numcases,numhid); posprods = zeros(numdims,numhid); negprods = zeros(numdims,numhid); vishidinc = zeros(numdims,numhid); hidbiasinc = zeros(1,numhid); visbiasinc = zeros(1,numdims); sigmainc = zeros(1,numhid); batchposhidprobs=zeros(numcases,numhid,numbatches); end for epoch = epoch:maxepoch, fprintf(1,'epoch %d\r',epoch); errsum=0; for batch = 1:numbatches, if (mod(batch,100)==0) fprintf(1,' %d ',batch); end %%%%%%%%% START POSITIVE PHASE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% data = batchdata(:,:,batch); poshidprobs = 1./(1 + exp(-data*vishid - repmat(hidbiases,numcases,1))); batchposhidprobs(:,:,batch)=poshidprobs; posprods = data' * poshidprobs; poshidact = sum(poshidprobs); posvisact = sum(data); %%%%%%%%% END OF POSITIVE PHASE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% poshidstates = poshidprobs > rand(numcases,numhid); %%%%%%%%% START NEGATIVE PHASE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% negdata = poshidstates*vishid' + repmat(visbiases,numcases,1);% + randn(numcases,numdims) if not using mean neghidprobs = 1./(1 + exp(-negdata*vishid - repmat(hidbiases,numcases,1))); negprods = negdata'*neghidprobs; neghidact = sum(neghidprobs); negvisact = sum(negdata); %%%%%%%%% END OF NEGATIVE PHASE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% err= sum(sum( (data-negdata).^2 )); errsum = err + errsum; if epoch>5, momentum=finalmomentum; else momentum=initialmomentum; end; %%%%%%%%% UPDATE WEIGHTS AND BIASES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% vishidinc = momentum*vishidinc + ... epsilonw*( (posprods-negprods)/numcases - weightcost*vishid); visbiasinc = momentum*visbiasinc + (epsilonvb/numcases)*(posvisact-negvisact); hidbiasinc = momentum*hidbiasinc + (epsilonhb/numcases)*(poshidact-neghidact); vishid = vishid + vishidinc; visbiases = visbiases + visbiasinc; hidbiases = hidbiases + hidbiasinc; %%%%%%%%%%%%%%%% END OF UPDATES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% end fprintf(1, '\nepoch %4i error %f \n', epoch, errsum); end dofacedeepauto.m: clear all close all maxepoch=200; %In the Science paper we use maxepoch=50, but it works just fine. numhid=2000; numpen=1000; numpen2=500; numopen=30; fprintf(1,'Pretraining a deep autoencoder. \n'); fprintf(1,'The Science paper used 50 epochs. This uses %3i \n', maxepoch); load fdata %makeFaceData; [numcases numdims numbatches]=size(batchdata); fprintf(1,'Pretraining Layer 1 with RBM: %d-%d \n',numdims,numhid); restart=1; rbmvislinear; hidrecbiases=hidbiases; save mnistvh vishid hidrecbiases visbiases; maxepoch=50; fprintf(1,'\nPretraining Layer 2 with RBM: %d-%d \n',numhid,numpen); batchdata=batchposhidprobs; numhid=numpen; restart=1; rbm; hidpen=vishid; penrecbiases=hidbiases; hidgenbiases=visbiases; save mnisthp hidpen penrecbiases hidgenbiases; fprintf(1,'\nPretraining Layer 3 with RBM: %d-%d \n',numpen,numpen2); batchdata=batchposhidprobs; numhid=numpen2; restart=1; rbm; hidpen2=vishid; penrecbiases2=hidbiases; hidgenbiases2=visbiases; save mnisthp2 hidpen2 penrecbiases2 hidgenbiases2; fprintf(1,'\nPretraining Layer 4 with RBM: %d-%d \n',numpen2,numopen); batchdata=batchposhidprobs; numhid=numopen; restart=1; rbmhidlinear; hidtop=vishid; toprecbiases=hidbiases; topgenbiases=visbiases; save mnistpo hidtop toprecbiases topgenbiases; backpropface; Thanks for your time

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• Difficulty creating classes and arrays of those classes C#

  - by Lucifer Fayte

  I'm trying to implement a Discrete Fourier Transformation algorithm for a project I'm doing in school. But creating a class is seeming to be difficult(which it shouldn't be). I'm using Visual Studio 2012. Basically I need a class called Complex to store the two values I get from a DFT; The real portion and the imaginary portion. This is what I have so far for that: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace SoundEditor_V3 { public class Complex { public double real; public double im; public Complex() { real = 0; im = 0; } } } The problem is that it doesn't recognize the constructor as a constructor, now I'm just learning C#, but I looked it up online and this is how it's supposed to look apparently. It recognizes my constructor as a method. Why is that? Am I creating the class wrong? It's doing the same thing for my Fourier class as well. So each time I try to create a Fourier object and then use it's method...there is no such thing. example, I do this: Fourier fou = new Fourier(); fou.DFT(s, N, amp, 0); and it tells me fou is a 'field' but is used like a 'type' why is it saying that? Here is the code for my Fourier class as well: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace SoundEditor_V3 { public class Fourier { //FOURIER //N = number of samples //s is the array of samples(data) //amp is the array where the complex result will be written to //start is the where in the array to start public void DFT(byte[] s, int N, ref Complex[] amp, int start) { Complex tem = new Complex(); int f; int t; for (f = 0; f < N; f++) { tem.real = 0; tem.im = 0; for (t = 0; t < N; t++) { tem.real += s[t + start] * Math.Cos(2 * Math.PI * t * f / N); tem.im -= s[t + start] * Math.Sin(2 * Math.PI * t * f / N); } amp[f].real = tem.real; amp[f].im = tem.im; } } //INVERSE FOURIER public void IDFT(Complex[] A, ref int[] s) { int N = A.Length; int t, f; double result; for (t = 0; t < N; t++) { result = 0; for (f = 0; f < N; f++) { result += A[f].real * Math.Cos(2 * Math.PI * t * f / N) - A[f].im * Math.Sin(2 * Math.PI * t * f / N); } s[t] = (int)Math.Round(result); } } } } I'm very much stuck at the moment, any and all help would be appreciated. Thank you.

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• Bridge or Factory and How

  - by Chris

  I'm trying to learn patterns and I've got a job that is screaming for a pattern, I just know it but I can't figure it out. I know the filter type is something that can be abstracted and possibly bridged. I'M NOT LOOKING FOR A CODE REWRITE JUST SUGGESTIONS. I'm not looking for someone to do my job. I would like to know how patterns could be applied to this example. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data; using System.IO; using System.Xml; using System.Text.RegularExpressions; namespace CopyTool { class CopyJob { public enum FilterType { TextFilter, RegExFilter, NoFilter } public FilterType JobFilterType { get; set; } private string _jobName; public string JobName { get { return _jobName; } set { _jobName = value; } } private int currentIndex; public int CurrentIndex { get { return currentIndex; } } private DataSet ds; public int MaxJobs { get { return ds.Tables["Job"].Rows.Count; } } private string _filter; public string Filter { get { return _filter; } set { _filter = value; } } private string _fromFolder; public string FromFolder { get { return _fromFolder; } set { if (Directory.Exists(value)) { _fromFolder = value; } else { throw new DirectoryNotFoundException(String.Format("Folder not found: {0}", value)); } } } private List<string> _toFolders; public List<string> ToFolders { get { return _toFolders; } } public CopyJob() { Initialize(); } private void Initialize() { if (ds == null) { ds = new DataSet(); } ds.ReadXml(Properties.Settings.Default.ConfigLocation); LoadValues(0); } public void Execute() { ExecuteJob(FromFolder, _toFolders, Filter, JobFilterType); } public void ExecuteAll() { string OrigPath; List<string> DestPaths; string FilterText; FilterType FilterWay; foreach (DataRow rw in ds.Tables["Job"].Rows) { OrigPath = rw["FromFolder"].ToString(); FilterText = rw["FilterText"].ToString(); switch (rw["FilterType"].ToString()) { case "TextFilter": FilterWay = FilterType.TextFilter; break; case "RegExFilter": FilterWay = FilterType.RegExFilter; break; default: FilterWay = FilterType.NoFilter; break; } DestPaths = new List<string>(); foreach (DataRow crw in rw.GetChildRows("Job_ToFolder")) { DestPaths.Add(crw["FolderPath"].ToString()); } ExecuteJob(OrigPath, DestPaths, FilterText, FilterWay); } } private void ExecuteJob(string OrigPath, List<string> DestPaths, string FilterText, FilterType FilterWay) { FileInfo[] files; switch (FilterWay) { case FilterType.RegExFilter: files = GetFilesByRegEx(new Regex(FilterText), OrigPath); break; case FilterType.TextFilter: files = GetFilesByFilter(FilterText, OrigPath); break; default: files = new DirectoryInfo(OrigPath).GetFiles(); break; } foreach (string fld in DestPaths) { CopyFiles(files, fld); } } public void MoveToJob(int RecordNumber) { Save(); LoadValues(RecordNumber - 1); } public void AddToFolder(string folderPath) { if (Directory.Exists(folderPath)) { _toFolders.Add(folderPath); } else { throw new DirectoryNotFoundException(String.Format("Folder not found: {0}", folderPath)); } } public void DeleteToFolder(int index) { _toFolders.RemoveAt(index); } public void Save() { DataRow rw = ds.Tables["Job"].Rows[currentIndex]; rw["JobName"] = _jobName; rw["FromFolder"] = _fromFolder; rw["FilterText"] = _filter; switch (JobFilterType) { case FilterType.RegExFilter: rw["FilterType"] = "RegExFilter"; break; case FilterType.TextFilter: rw["FilterType"] = "TextFilter"; break; default: rw["FilterType"] = "NoFilter"; break; } DataRow[] ToFolderRows = ds.Tables["Job"].Rows[currentIndex].GetChildRows("Job_ToFolder"); for (int i = 0; i <= ToFolderRows.GetUpperBound(0); i++) { ToFolderRows[i].Delete(); } foreach (string fld in _toFolders) { DataRow ToFolderRow = ds.Tables["ToFolder"].NewRow(); ToFolderRow["JobId"] = ds.Tables["Job"].Rows[currentIndex]["JobId"]; ToFolderRow["Job_Id"] = ds.Tables["Job"].Rows[currentIndex]["Job_Id"]; ToFolderRow["FolderPath"] = fld; ds.Tables["ToFolder"].Rows.Add(ToFolderRow); } } public void Delete() { ds.Tables["Job"].Rows.RemoveAt(currentIndex); LoadValues(currentIndex++); } public void MoveNext() { Save(); currentIndex++; LoadValues(currentIndex); } public void MovePrevious() { Save(); currentIndex--; LoadValues(currentIndex); } public void MoveFirst() { Save(); LoadValues(0); } public void MoveLast() { Save(); LoadValues(ds.Tables["Job"].Rows.Count - 1); } public void CreateNew() { Save(); int MaxJobId = 0; Int32.TryParse(ds.Tables["Job"].Compute("Max(JobId)", "").ToString(), out MaxJobId); DataRow rw = ds.Tables["Job"].NewRow(); rw["JobId"] = MaxJobId + 1; ds.Tables["Job"].Rows.Add(rw); LoadValues(ds.Tables["Job"].Rows.IndexOf(rw)); } public void Commit() { Save(); ds.WriteXml(Properties.Settings.Default.ConfigLocation); } private void LoadValues(int index) { if (index > ds.Tables["Job"].Rows.Count - 1) { currentIndex = ds.Tables["Job"].Rows.Count - 1; } else if (index < 0) { currentIndex = 0; } else { currentIndex = index; } DataRow rw = ds.Tables["Job"].Rows[currentIndex]; _jobName = rw["JobName"].ToString(); _fromFolder = rw["FromFolder"].ToString(); _filter = rw["FilterText"].ToString(); switch (rw["FilterType"].ToString()) { case "TextFilter": JobFilterType = FilterType.TextFilter; break; case "RegExFilter": JobFilterType = FilterType.RegExFilter; break; default: JobFilterType = FilterType.NoFilter; break; } if (_toFolders == null) _toFolders = new List<string>(); _toFolders.Clear(); foreach (DataRow crw in rw.GetChildRows("Job_ToFolder")) { AddToFolder(crw["FolderPath"].ToString()); } } private static FileInfo[] GetFilesByRegEx(Regex rgx, string locPath) { DirectoryInfo d = new DirectoryInfo(locPath); FileInfo[] fullFileList = d.GetFiles(); List<FileInfo> filteredList = new List<FileInfo>(); foreach (FileInfo fi in fullFileList) { if (rgx.IsMatch(fi.Name)) { filteredList.Add(fi); } } return filteredList.ToArray(); } private static FileInfo[] GetFilesByFilter(string filter, string locPath) { DirectoryInfo d = new DirectoryInfo(locPath); FileInfo[] fi = d.GetFiles(filter); return fi; } private void CopyFiles(FileInfo[] files, string destPath) { foreach (FileInfo fi in files) { bool success = false; int i = 0; string copyToName = fi.Name; string copyToExt = fi.Extension; string copyToNameWithoutExt = Path.GetFileNameWithoutExtension(fi.FullName); while (!success && i < 100) { i++; try { if (File.Exists(Path.Combine(destPath, copyToName))) throw new CopyFileExistsException(); File.Copy(fi.FullName, Path.Combine(destPath, copyToName)); success = true; } catch (CopyFileExistsException ex) { copyToName = String.Format("{0} ({1}){2}", copyToNameWithoutExt, i, copyToExt); } } } } } public class CopyFileExistsException : Exception { public string Message; } }

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• ZFS & Deduplicating FLAC Data

  - by jasongullickson

  I'm experimenting with using ZFS to deduplicate a large library of FLAC files. The purpose of this is twofold: Reduce storage utilization Reduce bandwidth needed to sync the library with cloud storage Many of these files are of the same music tracks but from different physical media. This means that for the most part they are the same and usually close to the same size, which makes me think that they should benefit from block-level deduplication. However in my testing I'm not seeing good results. When I create a pool and add three of these tracks (identical songs from different source media) zpool list reports 1.00 dedupe. If I copy all of the files (make exact duplicates of the three) dedupe climbs, so I know that it is enabled and functioning, but it's not finding any duplication in the original collection of files. My first thought was that perhaps some of the variable header data (metadata tags, etc.) might be mis-aligning the bulk of the data in these files (the audio frames) but even making the header data consistent across the three files doesn't seem to have any impact on deduplication. I'm considering taking alternate routes (testing other dedupe filesystems as well as some custom code) but since we're already using ZFS and I like the ZFS replication options, I'd prefer to use ZFS dedupe for this project; but perhaps it's simply not capable of working well with this sort of data. Any feedback regarding tuning that might improve dedupe performance for this sort of dataset, or confirmation that ZFS dedupe is not the right tool for this job are appreciated.

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• Deploying Memcached as 32bit or 64bit?

  - by rlotun

  I'm curious about how people deploy memcached on 64 bit machines. Do you compile a 64bit (standard) memcached binary and run that, or do people compile it in 32bit mode and run N instances (where N = machine_RAM / 4GB)? Consider a recommended deployment of Redis (from the Redis FAQ): Redis uses a lot more memory when compiled for 64 bit target, especially if the dataset is composed of many small keys and values. Such a database will, for instance, consume 50 MB of RAM when compiled for the 32 bit target, and 80 MB for 64 bit! That's a big difference. You can run 32 bit Redis binaries in a 64 bit Linux and Mac OS X system without problems. For OS X just use make 32bit. For Linux instead, make sure you have libc6-dev-i386 installed, then use make 32bit if you are using the latest Git version. Instead for Redis <= 1.2.2 you have to edit the Makefile and replace "-arch i386" with "-m32". If your application is already able to perform application-level sharding, it is very advisable to run N instances of Redis 32bit against a big 64 bit Redis box (with more than 4GB of RAM) instead than a single 64 bit instance, as this is much more memory efficient. Would not the same recommendation also apply to a memcached cluster?

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• DropDownList not working 100% in ASP.Net MVC

  - by Program.X

  I am quite confused with how to effectively use the Html.DropDownList helper for ASP.NET MVC. Background: I have a 5-page form, which saves data to the form each time "Next" is clicked. Users may navigate back and forth between sections, so previous sections will already be pre-populated with previously-entered data. This works for TextBoxes. But not DropDownLists. I have tried a load of different methods, including: http://stackoverflow.com/questions/867117/how-to-add-static-list-of-items-in-mvc-html-dropdownlist/867218#867218 http://stackoverflow.com/questions/2080802/setting-selected-item-to-dropdownlist-in-mvc-application I have a ViewModel such taht I have got my lists and my Model (a LINQ-to-SQL generated class) as properties. eg: public class ConsultantRegistrationFormViewModel { public IConsultantRegistration ConsultantRegistration { get; private set; } public SelectList Titles { get; private set; } public SelectList Countries { get; private set; } public SelectList Currencies { get; private set; } public int CurrentSection { get; private set; } private ConsultantRegistrationFormViewModel(IConsultantRegistration consultantRegistration) { ConsultantRegistration = consultantRegistration; CurrentSection = 1; Titles = new SelectList(new string[] { "Mr", "Mrs", "Miss", "Ms", "Dr", "Sir" }); Countries = new SelectList(countries.Select(q => q.Name)); Currencies = new SelectList(currencies,"CurrencyCode","FriendlyForm"); } } My Controller's Edit Action on GET looks like: public class ConsultantRegistrationController : Controller { public IConsultantRegistrationRepository ConsultantRegistrationRepository { get; private set; } public ICountryRepository CountryRepository { get; private set; } public IEnumerable<ICountry> Countries { get; private set; } public ConsultantRegistrationController() { ConsultantRegistrationRepository = RepositoryFactory.CreateConsultantRegistrationRepository(); CountryRepository = RepositoryFactory.CreateCountryRepository(); Countries = CountryRepository.GetCountries().ToArray(); } public ActionResult Edit(Guid id, int sectionIndex) { IConsultantRegistration consultantRegistration = ConsultantRegistrationRepository.GetConsultantRegistration(id); SelectList bankBranchCountriesSelectList = new SelectList(Countries, "BankBranchCountry", "CountryName", consultantRegistration.BankBranchCountry); ViewData["bankBranchCountrySelectList"] = bankBranchCountriesSelectList; return View(new ConsultantRegistrationFormViewModel(consultantRegistration,sectionIndex, Countries,Currencies)); } } With my View doing: <%: Html.DropDownList("ConsultantRegistration.BankBranchCountry",ViewData["bankBranchCountrySelectList"] as SelectList) %> This gives me the error: DataBinding: 'IWW.ArrowPay.ConsultantRegistration.Data.Country' does not contain a property with the name 'BankBranchCountry'. Which it does, have a look at the schema of this property: public interface IConsultantRegistration { Guid ID { get; set; } [DisplayName("Branch Country")] string BankBranchCountry { get; set; } } (My LINQ-to-SQL type ConsultantRegistration implemented IConsultantRegistration) It seems that it is trying to bind to the wrong type, though? If I use this in my view (and use my Controller's Countries property): <%: Html.DropDownList("ConsultantRegistration.BankBranchCountry ",Model.Countries,"(select a Country)") %> I get the saved value fine, but my model doesn't update on POST. And if I use this in my view: <%: Html.DropDownListFor(model=>model.ConsultantRegistration.BankBranchCountry ",Model.Countries,"(select a Country)") %> I get the list, and it POSTs the selected value back, but does not pre-select the currently selected item in my model on the view. So I have a bit of the solution all over the place, but not all in one place. Hope you can help fill in my ignorance.

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• LLBLGen Pro v3.0 with Entity Framework v4.0 (12m video)

  - by FransBouma

  Today I recorded a video in which I illustrate some of the database-first functionality available in LLBLGen Pro v3.0. LLBLGen Pro v3.0 also supports model-first functionality, which I hope to illustrate in an upcoming video. LLBLGen Pro v3.0 is currently in beta and is scheduled to RTM some time in May 2010. It supports the following frameworks out of the box, with more scheduled to follow in the coming year: LLBLGen Pro RTL (our own o/r mapper framework), Linq to Sql, NHibernate and Entity Framework (v1 and v4). The video I linked to below illustrates the creation of an entity model for Entity Framework v4, by reverse engineering the SQL Server 2008 example database 'AdventureWorks'. The following topics (among others) are included in the video: Abbreviation support (example: convert 'Qty' into 'Quantity' during name construction) Flexible, framework specific settings Attribute definitions for various elements (so no requirement for buddy-classes or messing with generated code or templates) Retrieval of relational model data from a database Reverse engineering of tables into entities, automatically placed in groups Auto-creation of inheritance hierarchies Refactoring of entity fields into Value Type Definitions (DDD) Mapping a Typed view onto a stored procedure resultset Creation of a Typed list (definition of a query with a projection) on a set of related entities Validation and correction of found inconsistencies and errors Generating code using one of the pre-defined presets Illustration of the code in vs.net 2010 It also gives a good overview of what it takes with LLBLGen Pro v3.0 to start from a new project, point it to a database, get an entity model, perform tweaks and validation and generate code which is ready to run. I am no video recording expert so there's no audio and some mouse movements might be a little too quickly. If that's the case, please pause the video. It's rather big (52MB). Click here to open the HTML page with the video (Flash). Opens in a new window. LLBLGen Pro v3.0 is currently in beta (available for v2.x customers) and scheduled to be released somewhere in May 2010.

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• Employee Info Starter Kit - Visual Studio 2010 and .NET 4.0 Version (4.0.0) Available

  - by joycsharp

  Employee Info Starter Kit is a ASP.NET based web application, which includes very simple user requirements, where we can create, read, update and delete (crud) the employee info of a company. Based on just a database table, it explores and solves all major problems in web development architectural space.  This open source starter kit extensively uses major features available in latest Visual Studio, ASP.NET and Sql Server to make robust, scalable, secured and maintanable web applications quickly and easily. Since it's first release, this starter kit achieved a huge popularity in web developer community and includes 1,40,000+ download from project web site. Visual Studio 2010 and .NET 4.0 came up with lots of exciting features to make software developers life easier.  A new version (v4.0.0) of Employee Info Starter Kit is now available in both MSDN Code Gallery and CodePlex. Chckout the latest version of this starter kit to enjoy cool features available in Visual Studio 2010 and .NET 4.0. [ Release Notes ] Architectural Overview Simple 2 layer architecture (user interface and data access layer) with 1 optional cache layer ASP.NET Web Form based user interface Custom Entity Data Container implemented (with primitive C# types for data fields) Active Record Design Pattern based Data Access Layer, implemented in C# and Entity Framework 4.0 Sql Server Stored Procedure to perform actual CRUD operation Standard infrastructure (architecture, helper utility) for automated integration (bottom up manner) and unit testing Technology UtilizedProgramming Languages/Scripts Browser side: JavaScript Web server side: C# 4.0 Database server side: T-SQL .NET Framework Components .NET 4.0 Entity Framework .NET 4.0 Optional/Named Parameters .NET 4.0 Tuple .NET 3.0+ Extension Method .NET 3.0+ Lambda Expressions .NET 3.0+ Aanonymous Type .NET 3.0+ Query Expressions .NET 3.0+ Automatically Implemented Properties .NET 3.0+ LINQ .NET 2.0 + Partial Classes .NET 2.0 + Generic Type .NET 2.0 + Nullable Type   ASP.NET 3.5+ List View (TBD) ASP.NET 3.5+ Data Pager (TBD) ASP.NET 2.0+ Grid View ASP.NET 2.0+ Form View ASP.NET 2.0+ Skin ASP.NET 2.0+ Theme ASP.NET 2.0+ Master Page ASP.NET 2.0+ Object Data Source ASP.NET 1.0+ Role Based Security Visual Studio Features Visual Studio 2010 CodedUI Test Visual Studio 2010 Layer Diagram Visual Studio 2010 Sequence Diagram Visual Studio 2010 Directed Graph Visual Studio 2005+ Database Unit Test Visual Studio 2005+ Unit Test Visual Studio 2005+ Web Test Visual Studio 2005+ Load Test Sql Server Features Sql Server 2005 Stored Procedure Sql Server 2005 Xml type Sql Server 2005 Paging support

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• Employee Info Starter Kit - Visual Studio 2010 and .NET 4.0 Version (4.0.0) Available

  - by Mohammad Ashraful Alam

  Employee Info Starter Kit is a ASP.NET based web application, which includes very simple user requirements, where we can create, read, update and delete (crud) the employee info of a company. Based on just a database table, it explores and solves most of the major problems in web development architectural space.  This open source starter kit extensively uses major features available in latest Visual Studio, ASP.NET and Sql Server to make robust, scalable, secured and maintanable web applications quickly and easily. Since it's first release, this starter kit achieved a huge popularity in web developer community and includes 1,40,000+ download from project web site. Visual Studio 2010 and .NET 4.0 came up with lots of exciting features to make software developers life easier.  A new version (v4.0.0) of Employee Info Starter Kit is now available in both MSDN Code Gallery and CodePlex. Chckout the latest version of this starter kit to enjoy cool features available in Visual Studio 2010 and .NET 4.0. [ Release Notes ] Architectural Overview Simple 2 layer architecture (user interface and data access layer) with 1 optional cache layer ASP.NET Web Form based user interface Custom Entity Data Container implemented (with primitive C# types for data fields) Active Record Design Pattern based Data Access Layer, implemented in C# and Entity Framework 4.0 Sql Server Stored Procedure to perform actual CRUD operation Standard infrastructure (architecture, helper utility) for automated integration (bottom up manner) and unit testing Technology UtilizedProgramming Languages/Scripts Browser side: JavaScript Web server side: C# 4.0 Database server side: T-SQL .NET Framework Components .NET 4.0 Entity Framework .NET 4.0 Optional/Named Parameters .NET 4.0 Tuple .NET 3.0+ Extension Method .NET 3.0+ Lambda Expressions .NET 3.0+ Aanonymous Type .NET 3.0+ Query Expressions .NET 3.0+ Automatically Implemented Properties .NET 3.0+ LINQ .NET 2.0 + Partial Classes .NET 2.0 + Generic Type .NET 2.0 + Nullable Type   ASP.NET 3.5+ List View (TBD) ASP.NET 3.5+ Data Pager (TBD) ASP.NET 2.0+ Grid View ASP.NET 2.0+ Form View ASP.NET 2.0+ Skin ASP.NET 2.0+ Theme ASP.NET 2.0+ Master Page ASP.NET 2.0+ Object Data Source ASP.NET 1.0+ Role Based Security Visual Studio Features Visual Studio 2010 CodedUI Test Visual Studio 2010 Layer Diagram Visual Studio 2010 Sequence Diagram Visual Studio 2010 Directed Graph Visual Studio 2005+ Database Unit Test Visual Studio 2005+ Unit Test Visual Studio 2005+ Web Test Visual Studio 2005+ Load Test Sql Server Features Sql Server 2005 Stored Procedure Sql Server 2005 Xml type Sql Server 2005 Paging support

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• NoSQL with MongoDB, NoRM and ASP.NET MVC

  - by shiju

   In this post, I will give an introduction to how to work on NoSQL and document database with MongoDB , NoRM and ASP.Net MVC 2. NoSQL and Document Database The NoSQL movement is getting big attention in this year and people are widely talking about document databases and NoSQL along with web application scalability. According to Wikipedia, "NoSQL is a movement promoting a loosely defined class of non-relational data stores that break with a long history of relational databases. These data stores may not require fixed table schemas, usually avoid join operations and typically scale horizontally. Academics and papers typically refer to these databases as structured storage". Document databases are schema free so that you can focus on the problem domain and don't have to worry about updating the schema when your domain is evolving. This enables truly a domain driven development. One key pain point of relational database is the synchronization of database schema with your domain entities when your domain is evolving.There are lots of NoSQL implementations are available and both CouchDB and MongoDB got my attention. While evaluating both CouchDB and MongoDB, I found that CouchDB can’t perform dynamic queries and later I picked MongoDB over CouchDB. There are many .Net drivers available for MongoDB document database. MongoDB MongoDB is an open source, scalable, high-performance, schema-free, document-oriented database written in the C++ programming language. It has been developed since October 2007 by 10gen. MongoDB stores your data as binary JSON (BSON) format . MongoDB has been getting a lot of attention and you can see the some of the list of production deployments from here - http://www.mongodb.org/display/DOCS/Production+Deployments NoRM – C# driver for MongoDB NoRM is a C# driver for MongoDB with LINQ support. NoRM project is available on Github at http://github.com/atheken/NoRM. Demo with ASP.NET MVC I will show a simple demo with MongoDB, NoRM and ASP.NET MVC. To work with MongoDB and  NoRM, do the following steps Download the MongoDB databse For Windows 32 bit, download from http://downloads.mongodb.org/win32/mongodb-win32-i386-1.4.1.zip  and for Windows 64 bit, download  from http://downloads.mongodb.org/win32/mongodb-win32-x86_64-1.4.1.zip . The zip contains the mongod.exe for run the server and mongo.exe for the client Download the NorM driver for MongoDB at http://github.com/atheken/NoRM Create a directory call C:\data\db. This is the default location of MongoDB database. You can override the behavior. Run C:\Mongo\bin\mongod.exe. This will start the MongoDb server Now I am going to demonstrate how to program with MongoDb and NoRM in an ASP.NET MVC application.Let’s write a domain class public class Category {            [MongoIdentifier]public ObjectId Id { get; set; } [Required(ErrorMessage = "Name Required")][StringLength(25, ErrorMessage = "Must be less than 25 characters")]public string Name { get; set;}public string Description { get; set; }}  ObjectId is a NoRM type that represents a MongoDB ObjectId. NoRM will automatically update the Id becasue it is decorated by the MongoIdentifier attribute. The next step is to create a mongosession class. This will do the all interactions to the MongoDB. internal class MongoSession<TEntity> : IDisposable{    private readonly MongoQueryProvider provider;     public MongoSession()    {        this.provider = new MongoQueryProvider("Expense");    }     public IQueryable<TEntity> Queryable    {        get { return new MongoQuery<TEntity>(this.provider); }    }     public MongoQueryProvider Provider    {        get { return this.provider; }    }     public void Add<T>(T item) where T : class, new()    {        this.provider.DB.GetCollection<T>().Insert(item);    }     public void Dispose()    {        this.provider.Server.Dispose();     }    public void Delete<T>(T item) where T : class, new()    {        this.provider.DB.GetCollection<T>().Delete(item);    }     public void Drop<T>()    {        this.provider.DB.DropCollection(typeof(T).Name);    }     public void Save<T>(T item) where T : class,new()    {        this.provider.DB.GetCollection<T>().Save(item);                }  }    The MongoSession constrcutor will create an instance of MongoQueryProvider that supports the LINQ expression and also create a database with name "Expense". If database is exists, it will use existing database, otherwise it will create a new databse with name  "Expense". The Save method can be used for both Insert and Update operations. If the object is new one, it will create a new record and otherwise it will update the document with given ObjectId.  Let’s create ASP.NET MVC controller actions for CRUD operations for the domain class Category public class CategoryController : Controller{ //Index - Get the category listpublic ActionResult Index(){    using (var session = new MongoSession<Category>())    {        var categories = session.Queryable.AsEnumerable<Category>();        return View(categories);    }} //edit a single category[HttpGet]public ActionResult Edit(ObjectId id) {     using (var session = new MongoSession<Category>())    {        var category = session.Queryable              .Where(c => c.Id == id)              .FirstOrDefault();         return View("Save",category);    } }// GET: /Category/Create[HttpGet]public ActionResult Create(){    var category = new Category();    return View("Save", category);}//insert or update a category[HttpPost]public ActionResult Save(Category category){    if (!ModelState.IsValid)    {        return View("Save", category);    }    using (var session = new MongoSession<Category>())    {        session.Save(category);        return RedirectToAction("Index");    } }//Delete category[HttpPost]public ActionResult Delete(ObjectId Id){    using (var session = new MongoSession<Category>())    {        var category = session.Queryable              .Where(c => c.Id == Id)              .FirstOrDefault();        session.Delete(category);        var categories = session.Queryable.AsEnumerable<Category>();        return PartialView("CategoryList", categories);    } }        }  You can easily work on MongoDB with NoRM and can use with ASP.NET MVC applications. I have created a repository on CodePlex at http://mongomvc.codeplex.com and you can download the source code of the ASP.NET MVC application from here

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• Parallelism in .NET – Part 9, Configuration in PLINQ and TPL

  - by Reed

  Parallel LINQ and the Task Parallel Library contain many options for configuration.  Although the default configuration options are often ideal, there are times when customizing the behavior is desirable.  Both frameworks provide full configuration support. When working with Data Parallelism, there is one primary configuration option we often need to control – the number of threads we want the system to use when parallelizing our routine.  By default, PLINQ and the TPL both use the ThreadPool to schedule tasks.  Given the major improvements in the ThreadPool in CLR 4, this default behavior is often ideal.  However, there are times that the default behavior is not appropriate.  For example, if you are working on multiple threads simultaneously, and want to schedule parallel operations from within both threads, you might want to consider restricting each parallel operation to using a subset of the processing cores of the system.  Not doing this might over-parallelize your routine, which leads to inefficiencies from having too many context switches. In the Task Parallel Library, configuration is handled via the ParallelOptions class.  All of the methods of the Parallel class have an overload which accepts a ParallelOptions argument. We configure the Parallel class by setting the ParallelOptions.MaxDegreeOfParallelism property.  For example, let’s revisit one of the simple data parallel examples from Part 2: Parallel.For(0, pixelData.GetUpperBound(0), row => { for (int col=0; col < pixelData.GetUpperBound(1); ++col) { pixelData[row, col] = AdjustContrast(pixelData[row, col], minPixel, maxPixel); } }); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } Here, we’re looping through an image, and calling a method on each pixel in the image.  If this was being done on a separate thread, and we knew another thread within our system was going to be doing a similar operation, we likely would want to restrict this to using half of the cores on the system.  This could be accomplished easily by doing: var options = new ParallelOptions(); options.MaxDegreeOfParallelism = Math.Max(Environment.ProcessorCount / 2, 1); Parallel.For(0, pixelData.GetUpperBound(0), options, row => { for (int col=0; col < pixelData.GetUpperBound(1); ++col) { pixelData[row, col] = AdjustContrast(pixelData[row, col], minPixel, maxPixel); } }); Now, we’re restricting this routine to using no more than half the cores in our system.  Note that I included a check to prevent a single core system from supplying zero; without this check, we’d potentially cause an exception.  I also did not hard code a specific value for the MaxDegreeOfParallelism property.  One of our goals when parallelizing a routine is allowing it to scale on better hardware.  Specifying a hard-coded value would contradict that goal. Parallel LINQ also supports configuration, and in fact, has quite a few more options for configuring the system.  The main configuration option we most often need is the same as our TPL option: we need to supply the maximum number of processing threads.  In PLINQ, this is done via a new extension method on ParallelQuery<T>: ParallelEnumerable.WithDegreeOfParallelism. Let’s revisit our declarative data parallelism sample from Part 6: double min = collection.AsParallel().Min(item => item.PerformComputation()); Here, we’re performing a computation on each element in the collection, and saving the minimum value of this operation.  If we wanted to restrict this to a limited number of threads, we would add our new extension method: int maxThreads = Math.Max(Environment.ProcessorCount / 2, 1); double min = collection .AsParallel() .WithDegreeOfParallelism(maxThreads) .Min(item => item.PerformComputation()); This automatically restricts the PLINQ query to half of the threads on the system. PLINQ provides some additional configuration options.  By default, PLINQ will occasionally revert to processing a query in parallel.  This occurs because many queries, if parallelized, typically actually cause an overall slowdown compared to a serial processing equivalent.  By analyzing the “shape” of the query, PLINQ often decides to run a query serially instead of in parallel.  This can occur for (taken from MSDN): Queries that contain a Select, indexed Where, indexed SelectMany, or ElementAt clause after an ordering or filtering operator that has removed or rearranged original indices. Queries that contain a Take, TakeWhile, Skip, SkipWhile operator and where indices in the source sequence are not in the original order. Queries that contain Zip or SequenceEquals, unless one of the data sources has an originally ordered index and the other data source is indexable (i.e. an array or IList(T)). Queries that contain Concat, unless it is applied to indexable data sources. Queries that contain Reverse, unless applied to an indexable data source. If the specific query follows these rules, PLINQ will run the query on a single thread.  However, none of these rules look at the specific work being done in the delegates, only at the “shape” of the query.  There are cases where running in parallel may still be beneficial, even if the shape is one where it typically parallelizes poorly.  In these cases, you can override the default behavior by using the WithExecutionMode extension method.  This would be done like so: var reversed = collection .AsParallel() .WithExecutionMode(ParallelExecutionMode.ForceParallelism) .Select(i => i.PerformComputation()) .Reverse(); Here, the default behavior would be to not parallelize the query unless collection implemented IList<T>.  We can force this to run in parallel by adding the WithExecutionMode extension method in the method chain. Finally, PLINQ has the ability to configure how results are returned.  When a query is filtering or selecting an input collection, the results will need to be streamed back into a single IEnumerable<T> result.  For example, the method above returns a new, reversed collection.  In this case, the processing of the collection will be done in parallel, but the results need to be streamed back to the caller serially, so they can be enumerated on a single thread. This streaming introduces overhead.  IEnumerable<T> isn’t designed with thread safety in mind, so the system needs to handle merging the parallel processes back into a single stream, which introduces synchronization issues.  There are two extremes of how this could be accomplished, but both extremes have disadvantages. The system could watch each thread, and whenever a thread produces a result, take that result and send it back to the caller.  This would mean that the calling thread would have access to the data as soon as data is available, which is the benefit of this approach.  However, it also means that every item is introducing synchronization overhead, since each item needs to be merged individually. On the other extreme, the system could wait until all of the results from all of the threads were ready, then push all of the results back to the calling thread in one shot.  The advantage here is that the least amount of synchronization is added to the system, which means the query will, on a whole, run the fastest.  However, the calling thread will have to wait for all elements to be processed, so this could introduce a long delay between when a parallel query begins and when results are returned. The default behavior in PLINQ is actually between these two extremes.  By default, PLINQ maintains an internal buffer, and chooses an optimal buffer size to maintain.  Query results are accumulated into the buffer, then returned in the IEnumerable<T> result in chunks.  This provides reasonably fast access to the results, as well as good overall throughput, in most scenarios. However, if we know the nature of our algorithm, we may decide we would prefer one of the other extremes.  This can be done by using the WithMergeOptions extension method.  For example, if we know that our PerformComputation() routine is very slow, but also variable in runtime, we may want to retrieve results as they are available, with no bufferring.  This can be done by changing our above routine to: var reversed = collection .AsParallel() .WithExecutionMode(ParallelExecutionMode.ForceParallelism) .WithMergeOptions(ParallelMergeOptions.NotBuffered) .Select(i => i.PerformComputation()) .Reverse(); On the other hand, if are already on a background thread, and we want to allow the system to maximize its speed, we might want to allow the system to fully buffer the results: var reversed = collection .AsParallel() .WithExecutionMode(ParallelExecutionMode.ForceParallelism) .WithMergeOptions(ParallelMergeOptions.FullyBuffered) .Select(i => i.PerformComputation()) .Reverse(); Notice, also, that you can specify multiple configuration options in a parallel query.  By chaining these extension methods together, we generate a query that will always run in parallel, and will always complete before making the results available in our IEnumerable<T>.

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• SharePoint 2010 MSDN Labs

  - by Kelly Jones

  Eric Ligman, from Microsoft, posted a great blog post this week listing all of the SharePoint 2010 Virtual Labs that are available from Microsoft.  His blog entry is here: http://blogs.msdn.com/b/mssmallbiz/archive/2012/03/13/sharepoint-server-2010-msdn-virtual-labs-available-to-you-online-plus-more-sharepoint-2010-resources.aspx He also posted other resources as well. I’ve copied his Virtual Lab links here: SharePoint Server 2010 Virtual Labs MSDN Virtual Lab: SharePoint Server 2010: Introduction MSDN Virtual Lab: Getting Started with SharePoint 2010 MSDN Virtual Lab: SharePoint 2010 User Interface Advancements MSDN Virtual Lab: SharePoint Server 2010 Connectors & Using the Business Data Connectivity (BDC) Service MSDN Virtual Lab: SharePoint Server 2010: Advanced Search Security MSDN Virtual Lab: SharePoint Server 2010: Configuring Search UIs MSDN Virtual Lab: SharePoint Server 2010: Content Processing and Property Extraction MSDN Virtual Lab: SharePoint Server 2010: Developing a Custom Connector MSDN Virtual Lab: SharePoint Server 2010: Fast Search Web Crawler MSDN Virtual Lab: SharePoint Server 2010: Federated Search MSDN Virtual Lab: SharePoint Server 2010: Linguistics MSDN Virtual Lab: SharePoint Server 2010: People Search Administration and Management MSDN Virtual Lab: SharePoint Server 2010: Relevancy and Ranking MSDN Virtual Lab: Customizing MySites MSDN Virtual Lab: Designing Lists and Schemas MSDN Virtual Lab: Developing a BCS External Content Type with Visual Studio 2010 MSDN Virtual Lab: Developing a Sandboxed Solution with Web Parts MSDN Virtual Lab: Developing a Visual Web Part in Visual Studio 2010 MSDN Virtual Lab: Developing Business Intelligence Applications MSDN Virtual Lab: Enterprise Content Management MSDN Virtual Lab: LINQ to SharePoint 2010 MSDN Virtual Lab: Visual Studio SharePoint Tools MSDN Virtual Lab: Workflow In addition to the SharePoint Server 2010 Virtual Labs, here are a few other SharePoint 2010 resources that I thought you might also be interested in: Technical reference for Microsoft SharePoint Server 2010 SharePoint 2010: IT Pro Evaluation Guide Connecting SharePoint 2010 to Line-of-Business Systems to Deliver Business-Critical Solutions Configure SharePoint Server 2010 as a Single Server with Microsoft SQL Server: Test Lab Guide Microsoft SQL Server 2012 Reporting Services Add-in for Microsoft SharePoint Technologies 2010 Deploying FAST Search Server 2010 for SharePoint FAST Search Server 2010 for SharePoint Add or Remove an Index Column Upgrade worksheet for SharePoint Server 2010 Microsoft SharePoint Server 2010 Technical Library in Compiled Help format Microsoft SharePoint Foundation 2010 Technical Library in Compiled Help format Microsoft FAST Search Server 2010 for SharePoint Technical Library in Compiled Help format Microsoft Reseller partner Learning Path Microsoft solutions partners and ISVs Learning Path Microsoft partner Practice Accelerator for SharePoint Microsoft partner SharePoint 2010 Internal Use Licenses SharePoint Case Studies SharePoint MSDN Forums SharePoint TechNet Forums Microsoft SharePoint 2010 page on Microsoft Partner Network portal

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• CodePlex Daily Summary for Thursday, February 18, 2010

  CodePlex Daily Summary for Thursday, February 18, 2010New ProjectsASP .NET MVC CMS (Content Management System): Open source Content management system based on ASP.NET MVC platform.AutoFolders: AutoFolders package for Umbraco CMS This package auto creates folder structures for new and existing pages. The folders structures can be date bas...AutoPex: This project combines CCI with Pex by allowing the developer to run Pex on methods based on differences between two assemblies. Canvas VSDOC Intellisense: JavaScript VSDOC documentation for HTML5 Canvas element and 2d Context interface.CSUDH: California State University, Domguiez Hills Game projectsD-AMPS: System for Analysis of Microelectronic and Photonic StructuresDispX: Disease PredictorEmployee Info Starter Kit: This is a starter kit, which includes very simple user requirements, where we can create, read, update and delete (crud) the employee info of a com...Enhanced Discussion Board for SharePoint: Provide later... publishing project to share with Malaysians firstFlowPad: Flowpad is a light, fast and easy to use flow diagram editor. It helps you quickly pour your algorithms from your mind to 'paper'. It is written us...Henge3D Physics Library for XNA: Henge3D is a 3D physics library written in C# for XNA. It is implemented entirely in managed code and is compatible with the XBOX 360.Hybrid Windows Service: Abstracted design pattern for running a windows service interactively. Implemented as a base class to replace ServiceBase it will automatically pro...Image Cropper datatype for Umbraco: Stand alone version of the Image Cropper datatype in Umbraco. Listinator: A social wishlist application done in asp.net MVCMicrosoft Dynamics Ax User Group (AXUG) Code Repository: The goal of this project is to make it easier for customers of Microsoft Dynamics Ax to be able to share relevant source code. Code base should inc...Mobil Trials: Sebuah game sederhana yang dibuat di atas Silverlight 3.0 dengan bantuan Physics Helper 3.0 Demo : http://gameagam.co.cc/default.html Mirror link...NavigateTo Providers: This project is a collection of NavigateTo providers for Visual Studio 2010. NExtLib: NExtLib is a general-purpose extension library for .NET, which adds some useful features and addresses some alleged omissions.Nom - .NET object-mapper: Nom is a light-weight, storage-type agnostic persistence framework which is intended to provide an abstraction over both relational and non-relatio...Numerical Methods on Silverlight: Numerical Methods, Silverlight, Math Parser, Simple, EulerOpenGLViewController for Visual Basic .NET 2008: A single class in pure VB.NET code to create and control an OpenGL window by calling opengl32.dll directly without use of additional wrapper librar...RestaurantMIS: RestaurantMIS is a simple Restaurant management system developed in Visual C# 2008 with Chinese language.SmartKonnect: <project name>A WPF application for windows with shoutcast, twitter, facebook and etc.SSRS Excel file Sheet rename: SSRS wont support renaming excel reports sheet rename. This program support to generate the report and change the excel sheet nameSWENTRIZ.NET: SWENTRIZ.NET allows to build graphics of implicit functions via .NET functionality.TFT: Tropical forecast tracker is a web application. It will measure the error of the National Hurricane Center's forecast as compared to the actual tr...WCF Dynamic Client Proxy: A WCF Dynamic Client Proxy so you don't have to inherit from ClientBase all the time. The proxy also has fault tolerance so you don't have to dispo...Web.Config Role Provider: Stores ASP.NET Roles in web.config. Easy to set up and deploy. Works great for simple websites with authentication. The projects includes support ...WPF Line of Business App: Example WPF patterns for line of business applications. Includes navigation, animation, and visualization.YuBiS Framework: Silverlight and WF based a workflow RAD framework. New ReleasesASP .NET MVC CMS (Content Management System): AtomicCms 1.0: This is the first public release of AtomicCms. To get more information about this content management system, visit website http://atomiccms.com/Blogsprajeesh.Blogspot samples: Designing Modular Smart Clients using CAL: This whitepaper provides architectural guidance for designing and implementing enterprise WPF/ silverlight client applications based on the Composi...DB Ghost Build Tools: 1.0.2: Made a change to the datetime format per dewee.DotNetNuke® Community Edition: 05.02.03: Major HighlightsFixed the issue where LinkClick.aspx links were incorrect for child portals Fixed the issue with the PayPal URL settings. Fixed...Employee Directory webpart for sharepoint 2007 user profiles: Employee Directory Source V2.0: Features: 1. Displays a complete list of all Active Directory profiles imported by the SSP into SharePoint 2007. 2. Displays the following fields ...Enhanced Discussion Board for SharePoint: Alpha Release: Meant for those who attended my presentation. Not cleaned upESPEHA: Espeha 9 PFR: Some small issues fixedFlowPad: FlowPad 0.1: FlowPad 0.1 build. Run it to get fammiliar with major concepts of easy diagramming :)Fluent Ribbon Control Suite: Fluent Ribbon Control Suite BETA2: Fluent Ribbon Control Suite BETA2 Includes: - Fluent.dll (with .pdb and .xml) - Demo Application - Samples - Foundation (Tabs, Groups, Contextu...Henge3D Physics Library for XNA: Henge3D Source (2010-02): This is the initial 2010-02 release.Highlight: Highlight 2.5: This release is primarily a maintenance release of the library and is functionally equivalent to version 2.3 that was released in 2004.Magiq: Magiq 0.3.0: Magiq 0.3.0 contains: Magiq-to-objects: Full support to Linq-to-objects Magiq-to-sql: Full support to Linq-to-sql New features: Plugin model Bu...Microsoft Points Converter: Pre-Alpha ClickOnce Installer v0.03: This release builds on the 0.02 release by adding more thorough validation checks for the amount to convert from as well as adding several currency...Mobil Trials: Mobil Trials Source Code: Sebuah game sederhana yang dibuat di atas Silverlight 3.0 dengan bantuan Physics Helper 3.0 Game ini masih perlu dikembangkan lebih jauh lagi! Si...Numerical Methods on Silverlight: Numerical Methods on Silverlight 1.00: This a new version of Numerical Methods on Silverlight.OAuthLib: OAuthLib (1.5.0.0): Changed point is as next. 7037 Fix spell miss of RequestFactoryMedthodSharePoint Outlook Connector: Version 1.0.1.0: Now it supports simply attaching SharePoint documents feature.Sharpy: Sharpy 1.1 Alpha: This is the second Sharpy release. Only a single change has been made - the foreach function now uses IEnumerable as a source instead of IList. Th...SkinDroidCreator: SkinDroidCreator ALPHA 1: Primera releaseTan solo carga mapas, ya sea de un zip o de un directorio. Para probarlo se pueden cargar temas Metamorph o temas flasheables, ya se...SkyDrive .Net API Client: SkyDrive .Net API Client 0.8.9: SkyDrive .Net API Client assembly version 0.8.9. Changes/improvements: - Added Web Proxy support - Introduced WebDriveInfo - Introduced DownloadUrl...spikes: Salient.Web.Administration 1.0: WebAdmin is simply the built in ASP.NetWebAdministrationFiles application cleaned up with codebehinds to make customization and refactoring possibl...SSRS Excel file Sheet rename: Change SSRS excel file sheet name: Create stored procedure from the attached file in sql server 2005/2008SWENTRIZ.NET: Approach 1: First approachTortoiseSVN Addin for Visual Studio: TortoiseSVN Addin 1.0.4: Visual Studio 2005 support Custom working root bug fixingTotal Commander SkyDrive File System Plugin (.wfx): Total Commander SkyDrive File System Plugin 0.8.4: Total Commander SkyDrive File System Plugin version 0.8.4. Bug fixes: - Upgraded SkyDriveWebClient to version 0.8.9 Please do not forget to expres...UnOfficial AW Wrapper dot Net: UAWW.Net 0.1.5.85 Béta 2: Fixed and Added SomethingVr30 OS: Space Brick Break 1.1: A brick breaker. ADD Level 3, 4, 5Web.Config Role Provider: First release: Three downloads are available: A compiled dll ready to use. The schema to enable intellisense The complete source (zipped)WI Assistant: WI Assistant 2.1: This release improves the work item selection functionality. These selection methods are now supported (some require at least one item selected): ...WI Assistant: WI Assistant 2.2: Improved error handling and fix for linking several times in a row. DISCLAIMER: While I have tested this app on my TFS Server, by downloading and...ZipStorer - A Pure C# Class to Store Files in Zip: ZipStorer 2.30: Added stream-oriented methods Improved support for ePUB & Open Container Format specification (OCF) Automatic switch from Deflate to Store algo...Most Popular ProjectsRawrDotNetNuke® Community EditionASP.NET Ajax LibraryFacebook Developer ToolkitWindows 7 USB/DVD Download ToolWSPBuilder (SharePoint WSP tool)Virtual Router - Wifi Hot Spot for Windows 7 / 2008 R2Json.NETPerformance Analysis of Logs (PAL) ToolQuickGraph, Graph Data Structures And Algorithms for .NetMost Active ProjectsDinnerNow.netRawrSharpyBlogEngine.NETSimple SavantjQuery Library for SharePoint Web ServicesNB_Store - Free DotNetNuke Ecommerce Catalog Modulepatterns & practices – Enterprise LibraryPHPExcelFacebook Developer Toolkit

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• Does LearnDevNow offers a useful subscription for .NET related training : with video and text reference material?

  - by user766926

  Does LearnDevNow offers a useful subscription for .NET video and text reference training material or to learn .NET? I could not find a review of www.learnnowonline.com/learndevnow I've been doing research about places that offer .NET / ASP.NET / C# / LINQ / SQL / JQuery video training that provide excellent material for developers. Kind of like a Lynda.com for back end development. However, I have not find one place that offers quality material that is easily accessible for the user, and that is priced competitive. This is what I'm looking for: Online Video tutorials with free future updates (videos that can be accessed on any device ie: android portable devices, mac / ipad, linux machines) Printable courseware (ie PDFs so that you can take notes, print if necessary, and read in a tablet in case you don;t have internet access) labs, and easy to access code Pre/Post Assessments/Exams for each training to keep track of your progress and what you have learned/skills. (Appdev used to offer this but it was way too expensive (thousands for each training ie 1k for each. I paid about five thousand at Appdev, and now I regret that purchase), and after a few years/months the training became obsolete - outdated) I looked at learnnowonline.com/learndevnow but it seems that their courseware / text reference material can only be accessed online, and don't know if their videos work in all mobile devices, and browsers (Safari, Chrome, IE, Opera, Firefox) Also, it seems Appdev not longer exist and now is called " AppDev is now LearnNowPlus : www.learnnowonline.com/appdev That site not longer offers prices. I tried to find reviews but could not find any. Does anyone know, or can share a review about some of these type of online training service providers? I would appreciate your feedback on this, and if you can share your past experiences with their service or similar/better services that would even be better. Thanks.

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• Entity Framework v1 &hellip; Brief Synopsis and Tips &ndash; Part 2

  - by Rohit Gupta

  Using Entity Framework with ASMX Web sErvices and WCF Web Service: If you use ASMX WebService to expose Entity objects from Entity Framework... then the ASMX Webservice does not  include object graphs, one work around is to use Facade pattern or to use WCF Service. The other important aspect of using ASMX Web Services along with Entity Framework is that the ASMX Client is not aware of the existence of EF v1 since the client solely deals with C# objects (not EntityObjects or ObjectContext). Since the client is not aware of the ObjectContext hence the client cannot participate in change tracking since the client only receives the Current Values and not the Orginal values when the service sends the the Entity objects to the client. Thus there are 2 drawbacks to using EntityFramework with ASMX Web Service: 1. Object state is not maintained... so to overcome this limitation we need insert/update single entity at a time and retrieve the original values for the entity being updated on the server/service end before calling Save Changes. 2. ASMX does not maintain object graphs... i.e. Customer.Reservations or Customer.Reservations.Trip relationships are not maintained. Thus you need to send these relationships separately from service to client. WCF Web Service overcomes the object graph limitation of ASMX Web Service, but we need to insure that we are populating all the non-null scalar properties of all the objects in the object graph before calling Update. WCF Web service still cannot overcome the second limitation of tracking changes to entities at the client end. Also note that the "Customer" class in the Client is very different from the "Customer" class in the Entity Framework Model Entities. They are incompatible with each other hence we cannot cast one to the other. However the .NET Framework translates the client "Customer" Entity to the EFv1 Model "customer" Entity once the entity is serialzed back on the ASMX server end. If you need change tracking enabled on the client then we need to use WCF Data Services which is available with VS 2010. ====================================================================================================== In WCF when adding an object that has relationships, the framework assumes that every object in the object graph needs to be added to store. for e.g. in a Customer.Reservations.Trip object graph, when a Customer Entity is added to the store, the EFv1 assumes that it needs to a add a Reservations collection and also Trips for each Reservation. Thus if we need to use existing Trips for reservations then we need to insure that we null out the Trip object reference from Reservations and set the TripReference to the EntityKey of the desired Trip instead. ====================================================================================================== Understanding Relationships and Associations in EFv1 The Golden Rule of EF is that it does not load entities/relationships unless you ask it to explicitly do so. However there is 1 exception to this rule. This exception happens when you attach/detach entities from the ObjectContext. If you detach an Entity in a ObjectGraph from the ObjectContext, then the ObjectContext removes the ObjectStateEntry for this Entity and all the relationship Objects associated with this Entity. For e.g. in a Customer.Order.OrderDetails if the Customer Entity is detached from the ObjectContext then you cannot traverse to the Order and OrderDetails Entities (that still exist in the ObjectContext) from the Customer Entity(which does not exist in the Object Context) Conversely, if you JOIN a entity that is not in the ObjectContext with a Entity that is in the ObjContext then the First Entity will automatically be added to the ObjContext since relationships for the 2 Entities need to exist in the ObjContext. ========================================================= You cannot attach an EntityCollection to an entity through its navigation property for e.g. you cannot code myContact.Addresses = myAddressEntityCollection ========================================================== Cascade Deletes in EDM: The Designer does not support specifying cascase deletes for a Entity. To enable cascasde deletes on a Entity in EDM use the Association definition in CSDL for the Entity. for e.g. SalesOrderDetail (SOD) has a Foreign Key relationship with SalesOrderHeader (SalesOrderHeader 1 : SalesOrderDetail *) if you specify a cascade Delete on SalesOrderHeader Entity then calling deleteObject on SalesOrderHeader (SOH) Entity will send delete commands for SOH record and all the SOD records that reference the SOH record. ========================================================== As a good design practise, if you use Cascade Deletes insure that Cascade delete facet is used both in the EDM as well as in the database. Even though it is not absolutely mandatory to have Cascade deletes on both Database and EDM (since you can see that just the Cascade delete spec on the SOH Entity in EDM will insure that SOH record and all related SOD records will be deleted from the database ... even though you dont have cascade delete configured in the database in the SOD table) ============================================================== Maintaining relationships in Code When Setting a Navigation property of a Entity (for e.g. setting the Contact Navigation property of Address Entity) the following rules apply : If both objects are detached, no relationship object will be created. You are simply setting a property the CLR way. If both objects are attached, a relationship object will be created. If only one of the objects is attached, the other will become attached and a relationship object will be created. If that detached object is new, when it is attached to the context its EntityState will be Added. One important rule to remember regarding synchronizing the EntityReference.Value and EntityReference.EntityKey properties is that when attaching an Entity which has a EntityReference (e.g. Address Entity with ContactReference) the Value property will take precedence and if the Value and EntityKey are out of sync, the EntityKey will be updated to match the Value. ====================================================== If you call .Load() method on a detached Entity then the .Load() operation will throw an exception. There is one exception to this rule. If you load entities using MergeOption.NoTracking, you will be able to call .Load() on such entities since these Entities are accessible by the ObjectContext. So the bottomline is that we need Objectontext to be able to call .Load() method to do deffered loading on EntityReference or EntityCollection. Another rule to remember is that you cannot call .Load() on entities that have a EntityState.Added State since the ObjectContext uses the EntityKey of the Primary (Parent) Entity when loading the related (Child) Entity (and not the EntityKey of the child (even if the EntityKey of the child is present before calling .Load()) ====================================================== You can use ObjContext.Add() to add a entity to the ObjContext and set the EntityState of the new Entity to EntityState.Added. here no relationships are added/updated. You can also use EntityCollection.Add() method to add an entity to another entity's related EntityCollection for e.g. contact has a Addresses EntityCollection so to add a new address use contact.Addresses.Add(newAddress) to add a new address to the Addresses EntityCollection. Note that if the entity does not already exist in the ObjectContext then calling contact.Addresses.Add(myAddress) will cause a new Address Entity to be added to the ObjContext with EntityState.Added and it will also add a RelationshipEntry (a relationship object) with EntityState.Added which connects the Contact (contact) with the new address newAddress. Note that if the entity already exists in the Objectcontext (being part theOtherContact.Addresses Collection), then calling contact.Addresses.Add(existingAddress) will add 2 RelationshipEntry objects to the ObjectStateEntry Collection, one with EntityState.Deleted and the other with EntityState.Added. This implies that the existingAddress Entity is removed from the theOtherContact.Addresses Collection and Added to the contact.Addresses Collection..effectively reassigning the address entity from the theOtherContact to "contact". This is called moving an existing entity to a new object graph. ====================================================== You usually use ObjectContext.Attach() and EntityCollection.Attach() methods usually when you need to reconstruct the ObjectGraph after deserializing the objects as received from a ASMX Web Service Client. Attach is usually used to connect existing Entities in the ObjectContext. When EntityCollection.Attach() is called the EntityState of the RelationshipEntry (the relationship object) remains as EntityState.unchanged whereas when EntityCollection.Add() method is called the EntityState of the relationship object changes to EntityState.Added or EntityState.Deleted as the situation demands. ========================================================= LINQ To Entities Tips: Select Many does Inner Join by default.   for e.g. from c in Contact from a in c.Address select c ... this will do a Inner Join between the Contacts and Addresses Table and return only those Contacts that have a Address. ======================================================== Group Joins Do LEFT Join by default. e.g. from a in Address join c in Contact ON a.Contact.ContactID == c.ContactID Into g WHERE a.CountryRegion == "US" select g; This query will do a left join on the Contact table and return contacts that have a address in "US" region The following query : from c in Contact join a in Address.Where(a1 => a1.CountryRegion == "US") on c.ContactID  equals a.Contact.ContactID into addresses select new {c, addresses} will do a left join on the Address table and return All Contacts. In these Contacts only those will have its Address EntityCollection Populated which have a Address in the "US" region, the other contacts will have 0 Addresses in the Address collection (even if addresses for those contacts exist in the database but are in a different region) ======================================================== Linq to Entities does not support DefaultIfEmpty().... instead use .Include("Address") Query Builder method to do a Left JOIN or use Group Joins if you need more control like Filtering on the Address EntityCollection of Contact Entity =================================================================== Use CreateSourceQuery() on the EntityReference or EntityCollection if you need to add filters during deferred loading of Entities (Deferred loading in EFv1 happens when you call Load() method on the EntityReference or EntityCollection. for e.g. var cust=context.Contacts.OfType<Customer>().First(); var sq = cust.Reservations.CreateSourceQuery().Where(r => r.ReservationDate > new DateTime(2008,1,1)); cust.Reservations.Attach(sq); This populates only those reservations that are older than Jan 1 2008. This is the only way (in EFv1) to Attach a Range of Entities to a EntityCollection using the Attach() method ================================================================== If you need to get the Foreign Key value for a entity e.g. to get the ContactID value from a Address Entity use this :                                address.ContactReference.EntityKey.EntityKeyValues.Where(k=> k.Key == "ContactID")

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• CodePlex Daily Summary for Friday, June 04, 2010

  CodePlex Daily Summary for Friday, June 04, 2010New Projects23 Umbraco addons: 23 Umbraco addonsAdd-ons for EPiServer Relate+: In the Add-ons for EPiServer Relate+ you will find add-ons, extensions and modules that work together with EPiServer Relate+.Advanced Mail Merge (AMM) for Microsoft Office: Advanced Mail Merge for Microsoft Word 2007/2010, offers great extensable functionality: - Merge to document (PDF) - Merge to attachment - Use Out...Cenobith RLS Sample: Simple implementation of Row Level Security for Microsoft SQL ServerCodingWheels.DataTypes: DataTypes tries to make it easier for developers to have concrete typesafe objects for working with many common forms of data. Many times these dat...DigitArchive: Digit Archive makes it easy for the DIGIT magazine readers to find the correct software or movie bundled in the media along with the magazine. You'...dNet.DB: dNetDB is a .net framework that simplifies model and data access by providing a database independent object-based persistence, where objects are pe...Dynamic Application Framework: The Dynamic Application Framework provides a highly flexible environment for creating applications. Multiple UI and Execution Environments, along w...ECoG: ECoG toolkitFB Toolkit with Contracts: This is a research project where I have inserted code contracts into the Facebook Toolkit source code., version 3.1 beta. This delivers an efficien...GeneCMS: GeneCMS allows users to generate static HTML based websites by offering an ASP.NET editing front-end that can be run in the local machine. It is ta...HooIzDat: HooIzDat is game that asks, who the heck is that?! It's a two player game where your task is to guess your opponent's person before he or she guess...JingQiao.Interacting: JingQiao Interacting MessagingKanbanBoard: Visual task board for Kanban and Scrum.Learning CSharp: Just Learning CSharpMammoth: mammothMapWindow Mobile: MapWindow Mobile is mobile GIS Software which can run on windows mobile, developed in C# .NET Compact Framework. It provides basic GIS functionalit...Mindless Setback: Setback is a card game popular in New England. This project uses a combination of brute force and Monte Carlo methods to play Setback. This is an e...MSNCore(DirectUI) Element Viewer: MSNCore Element Viewer is an application designed to enumerate the elements with in applications built with MSNCore.dll and UXCore.dll. This appli...MSVN Team: bài tập thầy lườngNugget: Web Socket Server: A web socket server implemented in c#. The goal of the projects is to create an easy way to start using HTML5 web sockets in .NET web applications.oSoft ColorPicker Control for Visual Studio 2010: oSoft ColorPicker is an user control that can be used instead of the ColorDialog when you want to allow your users to select a color in a windows f...Prism Software Factory: The Prism Software Factory is a software factory for Visual Studio 2010 assisting developers in the process of building WPF & Silverlight applicati...Project Lion: Project lion is forum developed in Silverlight technology. Refix - .NET dependency management: Refix is an attempt to solve the problem of binary dependency management in large .NET solutions. It will achieve the goal using (amongst other thi...Rich Task List: Rich Task List is a tutorial project for DotNetNuke Module Development.SharePoint PowerRSS: Easy/Clean way to get SharePoint list data via more standard RSS feed. I found CleanRSS.aspx as part of SPRSS: Enhanced RSS Functionality for WSS ...SOAPI - StackOverflow API Generator: Generates, directly from the self documenting StackOverflow API specification, an end-to-end, fully documented API wrapper library with Visual Stu...SQL Script Application Utility: This C# project allows you to apply scripts to a database for table creation, data creation, etc. You can keep DDL in separate SQL scripts which c...Sql Server Reports Viewer: Sql Server Reports Viewer makes it easier to render Sql Server Reports without the need to setup a SSRS Server. This makes deployments a breeze. ...StorageHD: StorageHD system for large video filesUrzaGatherer: UrzaGatherer is a WPF 4.0 client application to handle Magic The Gathering cards collections. You can manage expansions, blocks and all informatio...webrel: This tool executes simple relational algebra expressions. It is useful for learning of Database course. Javascript and xhtml is used to develop thi...World Wide Grab: World Wide Grab allows retrieval and integration of various semi-structured data sorces, expecially Web applications. It turns every available res...New Releases3FD - Framework For Fast Development (C++): Alpha 3: This release was compiled in Visual Studio Release mode. It means you can use it in whatever compiler you want. However, the compatibility with ano...Advanced Mail Merge (AMM) for Microsoft Office: Advanced MailMerge 2007.zip: Release 1.1.0.0Army Bodger: Bodger 3 Archetype Test: Ok so it's later and I've largely finished it. Right now the Space Wolves have their Troops written and one HQ unit. The equipment panel largely wo...AwesomiumDotNet: AwesomiumDotNet 1.6 beta: Preview of AwesomiumDotNet 1.6.Bojinx: Bojinx Core V4.6: New features in this release: Greatly improved logging for INFO and DEBUG. Improved the getClassName function in ObjectUtils. Added the ability ...Cenobith RLS Sample: Sample App: Change connection strings in App.config and Web.config files.Christoc's DotNetNuke C# Module Development Template: 00.00.02: A minor update from the original release with a few fixes including Localization and some updated documentation.Community Forums NNTP bridge: Community Forums NNTP Bridge V25: Release of the Community Forums NNTP Bridge to access the social and anwsers MS forums with a single, open source NNTP bridge. This release has ad...DEWD: DEWD for Umbraco v1.0: Beta release of the package. Functional feature set and fairly stable. Since the alpha: Validation on input fields Custom view controls Ability...DotNetNuke Developers Help File: DNNHelpSystem 05.04.02: Release of the developer core API help documentation of DotNetNuke in MSDN style format, both as .CHM stand alone file as well as a html website ba...Drive Backup: Drive Backup V.0604: This release includes the following fixes/features: * Fixed incompatibility with some USB drives (those marked as “fixed” by Windows) * Ad...Event Scavenger: Version 3.3 (Refresh): Archiving bit added to database plus archiving stored procedure updated. Rest of items just refreshed. Database set to version 3.3Expression Encoder Batch Processor: Expression Batch v0.3: Now set the newly-converted file's Created DateTime to equal the source file's. This helps keep your videos sorterd chronologically in media librar...Folder Bookmarks: Folder Bookmarks 1.6.1: The latest version of Folder Bookmarks (1.6.1), with Mini-Menu bug fixes and 'Help' feature - all the instructions needed to use the software (If y...Genesis Smart Client Framework: Genesis v2.0 - Ruby User Experience Platform (UXP): This is the start of the rewrite of the entire framework. The rewrite will include support for XAML through WPF and Silverlight, WCF, Workflow Serv...Global: http requester tool: Added a brnad new console app for making http requests.GMap.NET - Great Maps for Windows Forms & Presentation: Hot Build: this is latest change-set build, unstable previewHERB.IQ: Alpha 0.1 Source code release 4: As of 6-23-10 @ 9:48ESTInfragistics Analytics Framework: Infragistics Analytics Framework 1.0: This project includes wrappers for the Infragistics controls that integrate with the recently launched Microsoft Silverlight Analytics Framework. T...Innovative Games: Cube Mapper: Cube Mapper is a small tool that takes in six textures and outputs a cube map that is a combination of the six textures. Cube Mapper supports .tga...jQuery Library for SharePoint Web Services: SPServices 0.5.6: This release is in an alpha state. Please only download it if you know what you are getting and are willing to test it. In any case, it's a bad ide...linq to jquery: jlinq v1.00 no doc: First public version of jlinq! no doc yet, soon too come!LinqSpecs: Version 1.0.1: Fabio Maulo has sent several patchs in order to make LinqSpecs to work with any linq provider other than in memory. Big KUDOS for him.mojoPortal: 2.3.4.4: see release notes on mojoportal.com Note that we have separate deployment packages for .NET 3.5 and .NET 4.0 The deployment package downloads on ...Nugget: Web Socket Server: Initial POC release: The initial proof of concept release. To try it out, open the Sample App.sln, set the ChatServer project as the start-up project, start debugging ...oSoft ColorPicker Control for Visual Studio 2010: oSoft ColorPicker Control for VS 2010 Beta 1: Beta 1Refix - .NET dependency management: Refix v0.1.0.48 ALPHA: First preview version of Refix command-line tool.SharePoint 2010 CSV Bulk Term Set Importer: Bulk Term Set Importer: Initial ReleaseSOAPI - StackOverflow API Generator: SOAPI Wrappers: SOAPI-JS First release as SOAPI-JS, SOAPI-CS coming shortly. Tests and example includedSQL Compact Toolbox: Beta 0.8.1: Initial test release - mind the bumps. Requires Visual Studio 2010.Thumb nail creator and image resizer: ThumbnailCreator1.2: this release fixes and issue that was occuring when the control was used inside paged dataTS3QueryLib.Net: TS3QueryLib.Net Version 0.23.17.0: Changelog Added Properties "IsSpacer" and "SpacerInfo" to ChannelListEntry. "IsSpacer" allows you to check whether the channel is a spacer channel ...UI Accessibility Checker: UI Accessibility Checker v.2.0: We are excited to announce the release of AccChecker 2.0! In addition to numerous bug fixes and usability improvements, these major features have...webrel: webrel 1.0: webrel 1.0WindStyle SlugHelper for Windows Live Writer: 1.2.0.0: 增加：可以配置是否忽略已经包含slug的日志，请在插件选项中配置； 增加：插件图标； 更新：支持最新Windows Live Writer，版本号14.0.8117.416。Work Recorder - Hold on own time!: WorkRecorder 1.1: +Only one instance can run #Change histogram to pie chartMost Popular ProjectsWBFS ManagerRawrAJAX Control ToolkitMicrosoft SQL Server Product Samples: DatabaseSilverlight ToolkitWindows Presentation Foundation (WPF)PHPExcelpatterns & practices – Enterprise LibraryMicrosoft SQL Server Community & SamplesASP.NETMost Active ProjectsCommunity Forums NNTP bridgeRawrIonics Isapi Rewrite Filterpatterns & practices – Enterprise LibraryGMap.NET - Great Maps for Windows Forms & PresentationN2 CMSBlogEngine.NETFarseer Physics EngineMain projectMirror Testing System

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• Using RIA DomainServices with ASP.NET and MVC 2

  - by Bobby Diaz

  Recently, I started working on a new ASP.NET MVC 2 project and I wanted to reuse the data access (LINQ to SQL) and business logic methods (WCF RIA Services) that had been developed for a previous project that used Silverlight for the front-end.  I figured that I would be able to instantiate the various DomainService classes from within my controller’s action methods, because after all, the code for those services didn’t look very complicated.  WRONG!  I didn’t realize at first that some of the functionality is handled automatically by the framework when the domain services are hosted as WCF services.  After some initial searching, I came across an invaluable post by Joe McBride, which described how to get RIA Service .svc files to work in an MVC 2 Web Application, and another by Brad Abrams.  Unfortunately, Brad’s solution was for an earlier preview release of RIA Services and no longer works with the version that I am running (PDC Preview). I have not tried the RC version of WCF RIA Services, so I am not sure if any of the issues I am having have been resolved, but I wanted to come up with a way to reuse the shared libraries so I wouldn’t have to write a non-RIA version that basically did the same thing.  The classes I came up with work with the scenarios I have encountered so far, but I wanted to go ahead and post the code in case someone else is having the same trouble I had.  Hopefully this will save you a few headaches! 1. Querying When I first tried to use a DomainService class to perform a query inside one of my controller’s action methods, I got an error stating that “This DomainService has not been initialized.”  To solve this issue, I created an extension method for all DomainServices that creates the required DomainServiceContext and passes it to the service’s Initialize() method.  Here is the code for the extension method; notice that I am creating a sort of mock HttpContext for those cases when the service is running outside of IIS, such as during unit testing!     public static class ServiceExtensions     {         /// <summary>         /// Initializes the domain service by creating a new <see cref="DomainServiceContext"/>         /// and calling the base DomainService.Initialize(DomainServiceContext) method.         /// </summary>         /// <typeparam name="TService">The type of the service.</typeparam>         /// <param name="service">The service.</param>         /// <returns></returns>         public static TService Initialize<TService>(this TService service)             where TService : DomainService         {             var context = CreateDomainServiceContext();             service.Initialize(context);             return service;         }           private static DomainServiceContext CreateDomainServiceContext()         {             var provider = new ServiceProvider(new HttpContextWrapper(GetHttpContext()));             return new DomainServiceContext(provider, DomainOperationType.Query);         }           private static HttpContext GetHttpContext()         {             var context = HttpContext.Current;   #if DEBUG             // create a mock HttpContext to use during unit testing...             if ( context == null )             {                 var writer = new StringWriter();                 var request = new SimpleWorkerRequest("/", "/",                     String.Empty, String.Empty, writer);                   context = new HttpContext(request)                 {                     User = new GenericPrincipal(new GenericIdentity("debug"), null)                 };             } #endif               return context;         }     }   With that in place, I can use it almost as normally as my first attempt, except with a call to Initialize():     public ActionResult Index()     {         var service = new NorthwindService().Initialize();         var customers = service.GetCustomers();           return View(customers);     } 2. Insert / Update / Delete Once I got the records showing up, I was trying to insert new records or update existing data when I ran into the next issue.  I say issue because I wasn’t getting any kind of error, which made it a little difficult to track down.  But once I realized that that the DataContext.SubmitChanges() method gets called automatically at the end of each domain service submit operation, I could start working on a way to mimic the behavior of a hosted domain service.  What I came up with, was a base class called LinqToSqlRepository<T> that basically sits between your implementation and the default LinqToSqlDomainService<T> class.     [EnableClientAccess()]     public class NorthwindService : LinqToSqlRepository<NorthwindDataContext>     {         public IQueryable<Customer> GetCustomers()         {             return this.DataContext.Customers;         }           public void InsertCustomer(Customer customer)         {             this.DataContext.Customers.InsertOnSubmit(customer);         }           public void UpdateCustomer(Customer currentCustomer)         {             this.DataContext.Customers.TryAttach(currentCustomer,                 this.ChangeSet.GetOriginal(currentCustomer));         }           public void DeleteCustomer(Customer customer)         {             this.DataContext.Customers.TryAttach(customer);             this.DataContext.Customers.DeleteOnSubmit(customer);         }     } Notice the new base class name (just change LinqToSqlDomainService to LinqToSqlRepository).  I also added a couple of DataContext (for Table<T>) extension methods called TryAttach that will check to see if the supplied entity is already attached before attempting to attach it, which would cause an error! 3. LinqToSqlRepository<T> Below is the code for the LinqToSqlRepository class.  The comments are pretty self explanatory, but be aware of the [IgnoreOperation] attributes on the generic repository methods, which ensures that they will be ignored by the code generator and not available in the Silverlight client application.     /// <summary>     /// Provides generic repository methods on top of the standard     /// <see cref="LinqToSqlDomainService&lt;TContext&gt;"/> functionality.     /// </summary>     /// <typeparam name="TContext">The type of the context.</typeparam>     public abstract class LinqToSqlRepository<TContext> : LinqToSqlDomainService<TContext>         where TContext : System.Data.Linq.DataContext, new()     {         /// <summary>         /// Retrieves an instance of an entity using it's unique identifier.         /// </summary>         /// <typeparam name="TEntity">The type of the entity.</typeparam>         /// <param name="keyValues">The key values.</param>         /// <returns></returns>         [IgnoreOperation]         public virtual TEntity GetById<TEntity>(params object[] keyValues) where TEntity : class         {             var table = this.DataContext.GetTable<TEntity>();             var mapping = this.DataContext.Mapping.GetTable(typeof(TEntity));               var keys = mapping.RowType.IdentityMembers                 .Select((m, i) => m.Name + " = @" + i)                 .ToArray();               return table.Where(String.Join(" && ", keys), keyValues).FirstOrDefault();         }           /// <summary>         /// Creates a new query that can be executed to retrieve a collection         /// of entities from the <see cref="DataContext"/>.         /// </summary>         /// <typeparam name="TEntity">The type of the entity.</typeparam>         /// <returns></returns>         [IgnoreOperation]         public virtual IQueryable<TEntity> GetEntityQuery<TEntity>() where TEntity : class         {             return this.DataContext.GetTable<TEntity>();         }           /// <summary>         /// Inserts the specified entity.         /// </summary>         /// <typeparam name="TEntity">The type of the entity.</typeparam>         /// <param name="entity">The entity.</param>         /// <returns></returns>         [IgnoreOperation]         public virtual bool Insert<TEntity>(TEntity entity) where TEntity : class         {             //var table = this.DataContext.GetTable<TEntity>();             //table.InsertOnSubmit(entity);               return this.Submit(entity, null, DomainOperation.Insert);         }           /// <summary>         /// Updates the specified entity.         /// </summary>         /// <typeparam name="TEntity">The type of the entity.</typeparam>         /// <param name="entity">The entity.</param>         /// <returns></returns>         [IgnoreOperation]         public virtual bool Update<TEntity>(TEntity entity) where TEntity : class         {             return this.Update(entity, null);         }           /// <summary>         /// Updates the specified entity.         /// </summary>         /// <typeparam name="TEntity">The type of the entity.</typeparam>         /// <param name="entity">The entity.</param>         /// <param name="original">The original.</param>         /// <returns></returns>         [IgnoreOperation]         public virtual bool Update<TEntity>(TEntity entity, TEntity original)             where TEntity : class         {             if ( original == null )             {                 original = GetOriginal(entity);             }               var table = this.DataContext.GetTable<TEntity>();             table.TryAttach(entity, original);               return this.Submit(entity, original, DomainOperation.Update);         }           /// <summary>         /// Deletes the specified entity.         /// </summary>         /// <typeparam name="TEntity">The type of the entity.</typeparam>         /// <param name="entity">The entity.</param>         /// <returns></returns>         [IgnoreOperation]         public virtual bool Delete<TEntity>(TEntity entity) where TEntity : class         {             //var table = this.DataContext.GetTable<TEntity>();             //table.TryAttach(entity);             //table.DeleteOnSubmit(entity);               return this.Submit(entity, null, DomainOperation.Delete);         }           protected virtual bool Submit(Object entity, Object original, DomainOperation operation)         {             var entry = new ChangeSetEntry(0, entity, original, operation);             var changes = new ChangeSet(new ChangeSetEntry[] { entry });             return base.Submit(changes);         }           private TEntity GetOriginal<TEntity>(TEntity entity) where TEntity : class         {             var context = CreateDataContext();             var table = context.GetTable<TEntity>();             return table.FirstOrDefault(e => e == entity);         }     } 4. Conclusion So there you have it, a fully functional Repository implementation for your RIA Domain Services that can be consumed by your ASP.NET and MVC applications.  I have uploaded the source code along with unit tests and a sample web application that queries the Customers table from inside a Controller, as well as a Silverlight usage example. As always, I welcome any comments or suggestions on the approach I have taken.  If there is enough interest, I plan on contacting Colin Blair or maybe even the man himself, Brad Abrams, to see if this is something worthy of inclusion in the WCF RIA Services Contrib project.  What do you think? Enjoy!

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• CodePlex Daily Summary for Sunday, April 15, 2012

  CodePlex Daily Summary for Sunday, April 15, 2012Popular ReleasesAssaultCube Reloaded: 2.4.1 Valor: POSSIBLE KNIFE CRASH FIX Codename Valor as suggested by LMFAO! on the forums Weapon tweaks Linux has Ubuntu 11.10 32-bit precompiled binaries and Ubuntu 10.10 64-bit precompiled binaries, but you can compile your own as it also contains the source. If you are using Mac or other operating systems, download the Linux package. The server pack is ready for both Windows and Linux, but you might need to compile your own for linux (source included)callisto: callisto 2.0.25: removed 2 ip ranges from hotspot shield black list.KBCsv: KBCsv V1.4.0.0: #11872 (skipping records with delimited text can break parser) #11873 (globalization support in CsvWriter) #11185 (more versatile constructor and method overloads)National Geographic Photo of the Day Wallpaper Changer: Photo of the Day Wallpaper Changer v2.0: National Geographic - Photo of the Day Wallpaper Changer v2.0 is an improved version. It has some new features like improved GUI, automatic update and date to date photo archiver etc. please check out the user guide for more information. Please copy the exe in a directory and run. Its that simple to use :).Coding4Fun Tools: Coding4Fun.Phone.Toolkit v1.5.6: Bug Fixes nuget was broken for Timespan and complete build due to how i did the target. Corrected and made all 3 match. Color Slider (and by default Color Picker) didn't respect view state for being disabled depending on how it was set. Test application now has test cases.Json.NET: Json.NET 4.5 Release 3: Change - DefaultContractResolver.IgnoreSerializableAttribute is now true by default Fix - Fixed MaxDepth on JsonReader recursively throwing an error Fix - Fixed SerializationBinder.BindToName not being called with full assembly namesVisual Studio Team Foundation Server Branching and Merging Guide: v2 - For Visual Studio 11: Welcome to the BETA of the Branching and Merging Guide preview As this is a BETA release and the quality bar for the final Release has not been achieved, we value your candid feedback and recommend that you do not use or deploy these BETA artifacts in a production environment. Quality-Bar Details Documentation has been reviewed by Visual Studio ALM Rangers Documentation has not been through an independent technical review Documentation has been reviewed by the quality and recording te...Media Companion: MC 3.435b Release: This release should be the last beta for 3.4xx. A handful of problems have been sorted out since last weeks release. If there are no major problems this time, it will upgraded to 3.500 Stable at the end of the week! General The .NET Framework has been modified to use the Client profile, as provided by normal Windows updates; no longer is there a requirement to download and install the Full profile! mc_com.exe has been worked on to mimic proper Media Companion output (a big thanks to vbat99...Wholemy.LinkedLists: wholemy.linkedlists.2012.04.12.38: libs and srcTHE NVL Maker: The NVL Maker Ver 3.12: SIM??????，TRA??????，ZIP????。 ????????????????，??????~（??????????????????） ??????? simpatch1440x900 trapatch1440x900 ?????1400x900??1440x900，?????????????Data.xp3。 ???? ?????3.12?EXE????????????????， ??????????????，??Tool/krkrconf.exe，??Editor.exe， ???????????????「??????」。 ?????Editor.exe??????。 ???? ???? http://etale.us/gameupload/THE_NVL_Maker_ver3.12_sim.zip ???? http://www.mediafire.com/?je51683g22bz8vo ??Infinite Creation?? http://bbs.etale.us/forum.php ?????? ???? 3.12 ??? ???、????...Quick Performance Monitor: Version 1.8.2: Version 1.8.2. Add the ability for qpmset files to also store the Window location/size so predefined 'sets' can be forced to always open on the same place of the screen.SnmpMessenger: 0.1.1.1: Project Description SnmpMessenger, a messenger. Using the SNMP protocol to exchange messages. It's developed in C#. SnmpMessenger For .Net 4.0, Mono 2.8. Support SNMP V1, V2, V3. Features Send get, set and other requests and get the response. Send and receive traps. Handle requests and return the response. Note This library is compliant with the Common Language Specification(CLS). The latest version is 0.1.1.1. It is only a messenger, does not involve VACM. Any problems, Please mailto: wa...Python Tools for Visual Studio: 1.1.1: We’re pleased to announce the release of Python Tools for Visual Studio 1.1.1. Python Tools for Visual Studio (PTVS) is an open-source plug-in for Visual Studio which supports programming with the Python language. PTVS supports a broad range of features including: • Supports CPython and IronPython • Python editor with advanced member and signature intellisense • Code navigation: “Find all refs”, goto definition, and object browser • Local and remote debugging • Profiling with multiple view...Supporting Guidance and Whitepapers: v1 - Team Foundation Service Whitepapers: Welcome to the BETA release of the Team Foundation Service Whitepapers preview As this is a BETA release and the quality bar for the final Release has not been achieved, we value your candid feedback and recommend that you do not use or deploy these BETA artifacts in a production environment. Quality-Bar Details Documentation has been reviewed by Visual Studio ALM Rangers Documentation has been through an independent technical review All critical bugs have been resolved Known Issue...LINQ to Twitter: LINQ to Twitter Beta v2.0.24: Supports .NET 3.5, .NET 4.0, Silverlight 4.0, Windows Phone 7.1, and Client Profile. 100% Twitter API coverage. Also available via NuGet.Kendo UI ASP.NET Sample Applications: Sample Applications (2012-04-11): Sample application(s) demonstrating the use of Kendo UI in ASP.NET applications.SCCM Client Actions Tool: SCCM Client Actions Tool v1.12: SCCM Client Actions Tool v1.12 is the latest version. It comes with following changes since last version: Improved WMI date conversion to be aware of timezone differences and DST. Fixed new version check. The tool is downloadable as a ZIP file that contains four files: ClientActionsTool.hta – The tool itself. Cmdkey.exe – command line tool for managing cached credentials. This is needed for alternate credentials feature when running the HTA on Windows XP. Cmdkey.exe is natively availab...Dual Browsing: Dual Browser: Please note the following: I setup the address bar temporarily to only accepts http:// .com addresses. Just type in the name of the website excluding: http://, www., and .com; (Ex: for www.youtube.com just type: youtube then click OK). The page splitter can be grabbed by holding down your left mouse button and move left or right. By right clicking on the page background, you can choose to refresh, go back a page and so on. Demo video: http://youtu.be/L7NTFVM3JUYLiberty: v3.2.0.1 Release 9th April 2012: Change Log-Fixed -Reach Fixed a bug where the object editor did not work on non-English operating systemsPath Copy Copy: 10.1: This release addresses the following work items: 11357 11358 11359 This release is a recommended upgrade, especially for users who didn't install the 10.0.1 version.New ProjectsADENA: This project consists in the development of a Graphical User Interface (GUI) for a proof assistant for Propositional Classical Logic based on Natural Deduction method.Alternity Warships Editor: This is a tool designed to easy the process of creating a new spaceship for Alternity using the Warship rules.BigBallz: Projeto de site de Bolões para campeonatos diversos. A princípio pensado para copa do mundo de futebol de 2010Crescent: bunch of mac scriptsDemoVasquez: Demo Proyecto 1Didrotuos: DidrotuosEat Out Advocate: Eat Out Advocate --------------------Kuttiflow: A simple implementation of Workflow for .NetLuan Van Cuoi Khoa: Lu?n van cu?i khoa ÐH Tây Nguyênmapaconwindowsphone: probar un mapa de bing mapsMovie Renamer: Is your movie collection a mess? No idea which movie is which? This tool easily renames movies based on the title and the year of the movie. Helps you sort out that movie collection! It will download from IMDB the closest matches based on the name of the file. Very simple written in WPF, so it will need the .NET 4 framework. At the moment you cannot set how you want to movie to be renamed, it will always be: "MovieTitle (Year).ext".Online Math Calculator: This is an Online Math Calculator. What this does is take your equation in the usual form and convert every variable to x, y, and every constant to a, b, c, d, e, etc... use wolfram|alpha and then convert back to the input format. This allows to input most equations.Orchard on Windows Azure with Dynamic Deploy: Dynamic Deploy is a cloud deployment platform. This project includes the Orchard source code that was used to create a Windows Azure build. The original source has not been modified. We have just added more themes and modules and modified web.config with a machine key. visit httppcvvpes: pcvvpesPesquisa de Satisfacao: PesquisaPit of Despair: An XNA 4.0 game in C# focused on learning to write overhead dungeon crawl games. Inpired from games such as Zelda, Wizardy, perhaps some original Final Fantasy.Prova Branquinho: Prova BranquinhoRibHat: RibHat is a framework for building websites, forums, blogs, and web-based information systems. It is a set of libraries that help the programmer to get rid from the immobility of CMS, obtaining a maximum level of customization.SetupWizard: a SetupWizard, install windows service, create IIS site, create database during installation.SharkOS: This operating system is the system Arkadia OS but with a GUI, it is created in c #, it will be fast and no lag.Shopping List: Shopping List is a simple WP7 application that enables tracking of items to buy when going for groceries.Sim Cricket: Cricket simulation game.. For cricket and C# fans.. Simple InterNET Daemon: Simple InterNET DaemonSteggy: Steganography project. SychevIgor Win8 Apps Source Code: SychevIgor Win8 Apps Source Codetest53768492156478: nothingTool to change monitor display frequency on HTPC: This is a small application that can change the monitors refresh-rate by simply running one of the applications for the desired refresh-rate. It was developed to make it easy to change the refresh rate, when launching external media players from XBMC and so on... And it was published here, so that others can see how easily it can be done.TravelSaver: Hajj Umrah USA, Travel SaverUpdateBot: UpdateBot is a GUI application that simplifies and automates the downloading and parsing of FileHippo.com's Update Checker result pages.

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• CodePlex Daily Summary for Tuesday, June 15, 2010

  CodePlex Daily Summary for Tuesday, June 15, 2010New ProjectsBackup on Build: Backup critical files on each Visual Studio build.CDN Support for EPiServer CMS: This module adds CDN support for EPiServer CMS by modifying outgoing links.Custom WCF Bindings: This project contains some custom WCF LOB SDK bindings I have created including a SalesForce one. I will blog on updates as they occur. Please se...DocIcon for SharePoint 2010: DocIcon for SharePoint re-enables links from document icons in SharePoint 2010. This feature was in previous versions of SharePoint, but was remove...EEG Peak Detection: EEG Peak Detectionemployeemanagement1: employeemanagement1Enables map services on top of existing map providers like Google Maps: Services include Map visualization services, Map decoration services, Spot registration services and Spot naming services.fbprivacy: Tool to assess your Facebook Privacy SettingsfMRI SVM Toolbox: fMRI SVM ToolboxGCMS – using .Net for human CMS: GCMS makes only what you need to do with a CMS and nothing more and it makes it with .NETqjblog: My First Blog.Send2Sharepoint: Office(Word,Excel,Outlook) and windows explorer addin to upload documents to sharepoint document library. SharePoint Find and Replace: SharePoint Find & Replace allows you to replace a specific string within a site collection with a different value. For example, when you change a l...SharePoint Management Studio: This project developed on Visula Studio 2008 and c# language. The main aim is manage your SharePoint 2007 FARM.SharePoint PageController: A SharePoint solution which provides an extensible framework to perform actions on a per-page basis in SharePoint. OOTB functionality allows for f...SilverNotePad: Simple notepad built using MVVM patern.SolidWorks Addin Development: The SolidWorks Addin Development project is dedicated to helping developers and non-developers with creating fully functional addins.Sunlit World Scheme: Sunlit World Scheme is a nearly R4RS-compliant Scheme implementation that supports threading, TCP, UDP, cryptography, and simple graphics and windo...TimeBend: Time tracking gone wild.TinyCMS: Jednostavan CMS s mogućnosti unosa vijesti, linkova i natječaja. CSS je napravljen tek toliko... Aplikacija izrađena za dev4Fun natjecanje.Ujimanet Android: text categorization tool for androidVisual Storm Engine: Visual Storm es un motor para probar nuevas tecnologias orientadas a la creacion de video juegos. Por ahora solo soporta Windows Vista/7 y usa Dire...New ReleasesAjax ASP.Net Forum: developer.insecla.com-forum_v0.1.4: *VERSION: 0.1.4* FEATURES ADDED Rating Threads (Through AjaxCTK (included Ms .DLL in the BIN folder)) Empowered Within AJAX Custom star ima...AlphaGet: Alpha 3: Important: from this release WinGet changes its name to AlphaGet in order to identify it better and make it search-engine friendly. New Features N...Backup on Build: Backup on Build v1.0.0 Initial Release: Initial Release version 1.0.0Boleto.Net: BoletoNet: Última versão estável da BoletoNet.dll. O código fonte dessa versão pode ser encontrado em http://boletonet.codeplex.com/SourceControl/list/change...CDN Support for EPiServer CMS: CDN Support v1: See links on start page for information on how to use and install this module.Chargify.NET: Chargify.NET v0.750: Adding support for creating freemium subscription plans Adding preliminary JSON support Adding ISO 3166-1 Alpha 2 data embedded in the library ...Community Forums NNTP bridge: Community Forums NNTP Bridge V38: Release of the Community Forums NNTP Bridge to access the social and anwsers MS forums with a single, open source NNTP bridge. This release has ad...ContainerOne - C# application server: V0.1.3.0: New minor release containing: Infrastructure - core service An installer of a windows service which provides the following: Service registry Even...DocIcon for SharePoint 2010: wwEsp.DocIcon Deployment Package Release 1.0.0: This package installs the DocIcon feature on a SharePoint 2010 server farm. The solution is deployed as a Farm-level feature that can be enabled or...Ethical Hacking ASP.NET: Version 1.2.0.0: For the complete list of changes, new features and fixes in the new version, please view the Version History page. Read more about the available te...Folder Bookmarks: Folder Bookmarks 1.6.3: The latest version of Folder Bookmarks (1.6.3), with new features and Mini-Menu UI Changes (1.4). Once you have extracted the file, do not delete ...Hades: Projet Hadès - Official Demo - Version 0.1.1 Beta: Second release correcting some bugs... ---------------------------------------------------------------------------- - Projet Hadès - Official Demo...KooBoo Image Gallery: RC 1: This new Version has this features 1) Refactoring to change the mispelled word galery to gallery 2) Change to use the plugin in the same page of ...LibWowArmory: LibWowArmory 0.3 beta: LibWowArmory 0.3 betaThis release of the LibWowArmory source code matches the WoW Armory as of version 3.3.3. Changes since version 0.2.3:Solution...MailChimp4Umbraco: 0.90 stable: Can be used in productionMapWindow6: MapWindow 6.0 June 14: This version adds the WebMercator projection and fixes a bug that was causing some perfect spheres to be created as oblate WGS1984 spheroids.MDownloader: MDownloader-0.15.18.59782: Supported FileServe. Supported SharingMatrix. Fixed minor bugs.MGM - MyGroupManager: MyGroupManager v0.1.5 - Alpha: At this point the application appears feature complete and works pretty well. The code still needs some tweaks (error handling), and a general look...MvcPager: MvcPager 1.4: MvcPager 1.4 source codes and demo projects MvcPager 1.4版源代码及示例文件Nito.LINQ: Beta (v0.6): Rx version The "with Rx" versions of Nito.LINQ are built against Rx 1.0.2563.0, released 2010-06-09. Supported Platforms .NET 4.0 Client Profile, ...open gaze and mouse analyzer: Ogama 3.3: This release was published on 14.06.2010 and is a bugfix release. For the list of changes please visit http://www.ogama.net. Only use this installe...patterns & practices: Prism: Prism 4.0 Drop 2: Prism 4.0 Drop 2 Welcome to the second drop of Prism 4.0 (formally known as the Composite Application Guidance for WPF and Silverlight). This drop ...Prism Software Factory Light: 0.5 Beta: 4ward Prism Software Factory Light - 0.5 Beta releaseThis is the first public beta release of the 4ward Prism Software Factory Light that allows to...PROGRAMMABLE SOFTWARE DEVELOPMENT ENVIRONMENT: PROGRAMMABLE SOFTWARE DEVELOPMENT ENVIRONMENT--3.3: Over the last several months, my primary research effort has been directed at producing strictly portable development methods between C and C# . T...qjblog: v1.source: v1.sourceqjblog: v1blog: V1 BlogQuick Performance Monitor: Version 1.4.2: Added 'Move to new window' functionality.Refix - .NET dependency management: Refix v0.1.0.90 ALPHA: Added console tree-style visualisation of solution dependencies, as well as some bug fixes. This version should work out of the box with the demons...SEMICO Framework: Version Stable 1.0.0.3: Version Stable 1.0.0.3SharePoint Find and Replace: 1.0.16: Version: 1.0.16 This release is the first stable release of this project, including the Microsoft public license agreement. Fixes: Added about dia...SharePoint Management Studio: v1: v1SharePoint PageController: SharePoint PageController: For SharePoint 2010 and 2007 running on IIS 7Software Is Hardwork: Sw. Is Hw. Lib. 3.0.0.x+06: Sw. Is Hw. Lib. 3.0.0.x+06SolidWorks Addin Development: GenericAddinFramework-06.14.2010: R1.SourceGrid: SourceGrid 4.30: Sources are here Note that SourceGrid sources are not hosted on CodePlex. The sources are hosted on bitbucket.org Main Changes Improved hidden ...SSIS Expression Editor & Tester: Expression Editor and Tester v1.0.2.0: Corrected release of expression editor tool, no changes to control. Download and extract the files to get started, no install required. Changes Co...Sunlit World Scheme: Sunlit World Scheme - 20100614 - source and binary: This is the result of building the current source code in Debug mode. The source code is included.TinyCMS: TinyCMS: Source kodVCC: Latest build, v2.1.30614.0: Automatic drop of latest buildVianaNET - Videoanalysis for physical motion: VianaNET 1.2 - beta: This is the VianaNET beta release with some bug fixes. Would like to have some comments on it. Regards, AdrianWorkLogger: Worklogger Beta 1: Simple work logger for Windows in WPFMost Popular ProjectsWBFS ManagerRawrAJAX Control ToolkitMicrosoft SQL Server Product Samples: DatabaseSilverlight ToolkitWindows Presentation Foundation (WPF)patterns & practices – Enterprise LibraryPHPExcelMicrosoft SQL Server Community & SamplesASP.NETMost Active Projectspatterns & practices – Enterprise LibraryRhyduino - Arduino and Managed CodeCassandraemonCommunity Forums NNTP bridgedotSpatialjQuery Library for SharePoint Web ServicesBlogEngine.NETLightweight Fluent WorkflowNB_Store - Free DotNetNuke Ecommerce Catalog ModuleUmbraco CMS

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• Nice Generic Example that implements an interface.

  - by mbcrump

  I created this quick generic example after noticing that several people were asking questions about it. If you have any questions then let me know. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Globalization; namespace ConsoleApplication4 { //New class where Type implements IConvertible interface (interface = contract) class Calculate<T> where T : IConvertible { //Setup fields public T X; NumberFormatInfo fmt = NumberFormatInfo.CurrentInfo; //Constructor 1 public Calculate() { X = default(T); } //Constructor 2 public Calculate (T x) { X = x; } //Method that we know will return a double public double DistanceTo (Calculate<T> cal) { //Remove the.ToDouble if you want to see the methods available for IConvertible return (X.ToDouble(fmt) - cal.X.ToDouble(fmt)); } } class Program { static void Main(string[] args) { //Pass value type and call DistanceTo with an Int. Calculate<int> cal = new Calculate<int>(); Calculate<int> cal2 = new Calculate<int>(10); Console.WriteLine("Int : " + cal.DistanceTo(cal2)); //Pass value type and call DistanceTo with an Double. Calculate<double> cal3 = new Calculate<double>(); Calculate<double> cal4 = new Calculate<double>(10.6); Console.WriteLine("Double : " + cal3.DistanceTo(cal4)); //Pass reference type and call DistanceTo with an String. Calculate<string> cal5 = new Calculate<string>("0"); Calculate<string> cal6 = new Calculate<string>("345"); Console.WriteLine("String : " + cal5.DistanceTo(cal6)); } } }

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• CodePlex Daily Summary for Wednesday, March 31, 2010

  CodePlex Daily Summary for Wednesday, March 31, 2010New ProjectsBase Class Libraries: The Base Class Libraries site hosts samples, previews, and prototypes from the BCL team. BB Scheduler - BroadBand Scheduler: Broadband Scheduler is highly useful as it helps the user to set the time when the computer will automatically enable the Broadband (Internet) conn...BFBC2 PRoCon: BFBC2 PRoCon makes it easier for Bad Company 2 GSP's and private server owners to administer their BFBC2 servers. It's developed in C# and targete...Business Process Management Virtual Environment (BPMVE): This BPMVE project has been separated into 3 different projects. BPMVE_DataStructure project contains all data structures (classes and attribute...Business Rule Engine BizUnit Test Steps: Business Rule Engine BizUnit Test StepsCint: CintContent Edit Extender for Ajax.Net: The Content Edit Extender is an Ajax.Net control extender that allows in-place editing of a div tag (panel). Double-click to edit, hit enter or tab...COV Game: Cov game is a worms like game made on Silverlight with Python server.Cybera: A continuing development project of the existing but now generally inactive former Cybera project.DotNetCRM Community Edition: DotNetCRM Community Edition is an open source, enterprise class CRM built on the .NET platform. It is designed to be extensible, configurable, data...EAV: A sample EAV pattern for SQL Server with: Tables and indexes Partial referential integrity Partial data typing Updatable views (like normal SQL table)EditRegion.MVC: EditRegion.MVC may be all you want, when you do not want a full CMS. It allows html areas to be edited by nominated users or roles. The API follo...Firestarter Modeller: Firestarter ModellerHabanero.Testability: Habanero.TestabilityProSoft CMS: CMS System - scalable over an undeclared amount of servers - publishing services - version control of sitesPS-Blog.net: This is my first project here on codeplex. I would like to write my own blog software. Any comments or critcs are welcome.ReleaseMe: ReleaseMe is a simple little tool I use to copy websites, and custom Window Services, from my development machine to a specified production machin...SAAS-RD: SAAS-RD: uma ferrameta utilizada para prover integração de SaaS com aplicações externasSample Web Application using Telerik's OpenAccess ORM: Sample Web Site Application Project that uses Telerik's OpenAccess ORM for data access.Sistema Facturacion: En el proyecto de Sistema de Facturacion se desarrollara una aplicacion para el total control de un establecimiento comercial Smooth Habanero: Smooth HabaneroSouthEast Conference 2011: For the Florida Institute of Technology IEEE Chapter regarding the Southeast Hardware Conference held in Nashville, TN 2011.SQL Server Bible Standards: A SQL Server Design and Development standards document. SSAS Profiler Trace Scheduler: AS Profiler Scheduler is a tool that will enable Scheduling of SQL AS Tracing using predefined Profiler Templates. For tracking different issues th...Symbolic Algebra: Another attempt to make an algebric system but to be natively in C# under the .net framework. Theocratic Ministry School System: This is an Open Source Theocratic Ministry School System designed for Jehovah's Witnesses. It will include much of the same features as the TMS ver...Weather Report WebControls: The First Release Version:1.0.10330.2334WPF 3D Labyrinth: A project for "Design and Analysis of Computer Algorithms" subject at Kaunas University of Technology. Building a 3D labyrinth with a figure which ...WPF Zen Garden: This is intended to be a gallery for WPF Style sheets in the form of Css Zen Garden. New ReleasesAPSales CRM - Software as a Service: APSales 0.1.3: This version add some interesting features to the project: Implement "Filter By Additional Fields" in view edit Implement quick create function Im...Base Class Libraries: BigRational: BigRational builds on the BigInteger introduced in .NET Framework 4 to create an arbitrary-precision rational number type. A rational number is a ...Base Class Libraries: Long Path: The long path wrapper provides functionality to make it easier to work with paths that are longer than the current 259 character limit of the Syste...Base Class Libraries: PerfMonitor: PerfMonitor is a command-line tool for profiling the system using Event Tracing for Windows (ETW). PerfMonitor is built on top of the TraceEvent li...Base Class Libraries: TraceEvent: TraceEvent is an experimental library that greatly simplifies reading Event Tracing for Windows (ETW) events. It is used by the PerfMonitor tool. ...BB Scheduler - BroadBand Scheduler: Broadband Scheduler v2.0: - Broadband service has some of the cheap and best monthly plans for the users all over the nation. And some of the plans include unlimited night d...BuildTools - Toolset for automated builds: BuildTools 2.0 Mar 2010 Milestone: The Mar 2010 Milestone release is a contains a bug fixes for projects not explicitly setting the StartingDate property, and no longer breaks when t...Business Rule Engine BizUnit Test Steps: BRE BizUnit Test Steps Ver. 1.0: Version 1.0Claymore MVP: Claymore 1.1.0.0: Changelog Added Compact Framework support Added fluent interface to configure the library.Content Edit Extender for Ajax.Net: ContentEditExtender 1.0 for Ajax.Net: Complete with source control and test/example Website and Web Service. Built with Visual Studio 2008 with the 3.5 BCL. Control requires the AjaxCon...dylan.NET: dylan.NET v. 9.6: This stable version of the compiler for both .NET 3.5 and 4.0 adds the loading of numbers in a bult-in fashion. See code below: #refasm mscorlib...EAV: March 2010: The initial release as demoed at the SSWUG Virtual Conference Spring 2010Fax .NET: Fax .NET 1.0.1: FIX : bugs for x64 and WOW64 architecture. The zip file include : Binary file Demo executable file Help fileFluent Ribbon Control Suite: Fluent Ribbon Control Suite 1.0 for NET 4.0 RC: Includes: Fluent.dll (with .pdb and .xml) compiled with .NET 4.0 RC Test application compiled with .NET 4.0 RC SourcesIceChat: IceChat 2009 Alpha 12.1 Full Install: Build Alpha 12.1 - March 30 2010 Fix Nick Name Change for Tabs/Server List for Queries Fix for running Channel List Multiple Times, clears list n...Import Excel data to SharePoint List: Import Data from Spreadsheet to SP List V1.5 x64: Import from Spreadsheet to a SharePoint List is the missing facet to the WSS 3.0 / MOSS 2007 List features. SharePoint lets a user create a custom...LINQ to Twitter: LINQ to Twitter Beta v2.0.9: New items added since v1.1 include: Support for OAuth (via DotNetOpenAuth), secure communication via https, VB language support, serialization of ...mojoPortal: 2.3.4.1: see release notes on mojoportal.com http://www.mojoportal.com/mojoportal-2341-released.aspxocculo: test: Release build for testers.PowerShell ToodleDo Module: 0.1: Initial Development Release - Very rough build.Quick Performance Monitor: Version 1.2: Fixed issue where app crash when performance counter disappear or becomes unavailable while the application is running. For now the exception is si...Quick Performance Monitor: Version 1.3: Add 'view last error'Rule 18 - Love your clipboard: Rule 18 (Visual Studio 2010 + .NET 4 RC Version): This is the second public beta for the first version of Rule 18. It has had a extensive private beta and been used in big presentations since the ...Selection Maker: Selection Maker 1.5: New Features:If the source folder does not exist,a dialog box will appear and ask the user if he/she wants to create that folder or if select anoth...sPATCH: sPatch v0.9a: + Fixed: wrong path to elementclient.exeSQL Server Bible Standards: March 2010: Initial release as presented at SSWUG Virtual Conference Spring 2010Survey - web survey & form engine: Source Code Documentation: Documentation.chm file as published with Nsurvey v. 1.9.1 - april 2005 Basic technical documentation and description of source code for developers...Theocratic Ministry School System: Theocratic Ministry School System - TMSS: This is the first release of TMSS. It is far from complete but demonstrates the possiablities of what can be done with Access 2007 using developer ...Weather Report WebControls: WeatherReport Controls: 本下载包含一个已经经过编译的二进制运行库和一个测试的WebApplication项目，是2010年3月30日发布的Most Popular ProjectsRawrWBFS ManagerASP.NET Ajax LibraryMicrosoft SQL Server Product Samples: DatabaseSilverlight ToolkitAJAX Control ToolkitWindows Presentation Foundation (WPF)LiveUpload to FacebookASP.NETMicrosoft SQL Server Community & SamplesMost Active ProjectsRawrjQuery Library for SharePoint Web ServicesBase Class LibrariesBlogEngine.NETManaged Extensibility FrameworkFarseer Physics EngineGraffiti CMSMicrosoft Biology FoundationLINQ to Twitterpatterns & practices – Enterprise Library

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• A Gentle .NET touch to Unix Touch

  - by lavanyadeepak

  A Gentle .NET touch to Unix Touch The Unix world has an elegant utility called 'touch' which would modify the timestamp of the file whose path is being passed an argument to  it. Unfortunately, we don't have a quick and direct such tool in Windows domain. However, just a few lines of code in C# can fill this gap to embrace and rejuvenate any file in the file system, subject to access ACL restrictions with the current timestamp.   using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace LavanyaDeepak.Utilities { class Touch { static void Main(string[] args) { if (args.Length < 1) { Console.WriteLine("Please specify the path of the file to operate upon."); return; } if (!File.Exists(args[0])) { try { FileAttributes objFileAttributes = File.GetAttributes(args[0]); if ((objFileAttributes & FileAttributes.Directory) == FileAttributes.Directory) { Console.WriteLine("The input was not a regular file."); return; } } catch { } Console.WriteLine("The file does not seem to be exist."); return; } try { File.SetLastWriteTime(args[0], DateTime.Now); Console.WriteLine("The touch completed successfully"); } catch (System.UnauthorizedAccessException exUnauthException) { Console.WriteLine("Unable to touch file. Access is denied. The security manager responded: " + exUnauthException.Message); } catch (IOException exFileAccessException) { Console.WriteLine("Unable to touch file. The IO interface failed to complete request and responded: " + exFileAccessException.Message); } catch (Exception exGenericException) { Console.WriteLine("Unable to touch file. An internal error occured. The details are: " + exGenericException.Message); } } } }

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• Overriding GetHashCode in a mutable struct - What NOT to do?

  - by Kyle Baran

  I am using the XNA Framework to make a learning project. It has a Point struct which exposes an X and Y value; for the purpose of optimization, it breaks the rules for proper struct design, since its a mutable struct. As Marc Gravell, John Skeet, and Eric Lippert point out in their respective posts about GetHashCode() (which Point overrides), this is a rather bad thing, since if an object's values change while its contained in a hashmap (ie, LINQ queries), it can become "lost". However, I am making my own Point3D struct, following the design of Point as a guideline. Thus, it too is a mutable struct which overrides GetHashCode(). The only difference is that mine exposes and int for X, Y, and Z values, but is fundamentally the same. The signatures are below: public struct Point3D : IEquatable<Point3D> { public int X; public int Y; public int Z; public static bool operator !=(Point3D a, Point3D b) { } public static bool operator ==(Point3D a, Point3D b) { } public Point3D Zero { get; } public override int GetHashCode() { } public override bool Equals(object obj) { } public bool Equals(Point3D other) { } public override string ToString() { } } I have tried to break my struct in the way they describe, namely by storing it in a List<Point3D>, as well as changing the value via a method using ref, but I did not encounter they behavior they warn about (maybe a pointer might allow me to break it?). Am I being too cautious in my approach, or should I be okay to use it as is?

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• Craftsmanship is ALL that Matters

  - by Wayne Molina

  Today, I'm going to talk about a touchy subject: the notion of working in a company that doesn't use the prescribed "best practices" in its software development endeavours.  Over the years I have, using a variety of pseudonyms, asked this question on popular programming forums.  Although I always add in some minor variation of the story to avoid suspicion that it's the same person posting, the crux of the tale remains the same: A Programmer’s Tale A junior software developer has just started a new job at an average company, creating average line-of-business applications for internal use (the most typical scenario programmers find themselves in).  This hypothetical newbie has spent a lot of time reading up on the "theory" of software development, devouring books, blogs and screencasts from well-known and respected software developers in the community in order to broaden his knowledge and "do what the pros do".  He begins his new job, eager to apply what he's learned on a real-world project only to discover that his new teammates doesn't use any of those concepts and techniques.  They hack their way through development, or in a best-case scenario use some homebrew, thrown-together semblance of a framework for their applications that follows not one of the best practices suggested by the “elite” in the software community - things like TDD (TDD as a "best practice" is the only subjective part of this post, but it's included here due to a very large following of respected developers who consider it one), the SOLID principles, well-known and venerable tools, even version control in a worst case and truly nightmarish scenario.  Our protagonist is frustrated that he isn't doing things the "proper" way - a way he's spent personal time digesting and learning about and, more importantly, a way that some of the top developers in the industry advocate - and turns to a forum to ask the advice of his peers. Invariably the answer I, in the guise of the concerned newbie, will receive is that A) I don't know anything and should just shut my mouth and sling code the bad way like everybody else on the team, and B) These "best practices" are fade or a joke, and the only thing that matters is shipping software to your customers. I am here today to say that anyone who says this, or anything like it, is not only full of crap but indicative of exactly the type of “developer” that has helped to give our industry a bad name.  Here is why: One Who Knows Nothing, Understands Nothing On one hand, you have the cognoscenti of the .NET development world.  Guys like James Avery, Jeremy Miller, Ayende Rahien and Rob Conery; all well-respected and noted programmers that are pretty much our version of celebrities.  These guys write blogs, books, and post videos outlining the "correct" way of writing software to make sure it not only works but is maintainable and extensible and a joy to work with.  They tout the virtues of the SOLID principles, or of using TDD/BDD, or using a mature ORM like NHibernate, Subsonic or even Entity Framework. On the other hand, you have Joe Everyman, Lead Software Developer at Initrode Corporation - in our hypothetical story Joe is the junior developer's new boss.  Joe's been with Initrode for 10 years, starting as the company’s very first programmer and over the years building up a little fiefdom of his own until at the present he’s in charge of all Initrode’s software development.  Joe writes code the same way he always has, without bothering to learn much, if anything.  He looked at NHibernate once and found it was "too hard", so he uses a primitive implementation of the TableDataGateway pattern as a wrapper around SqlClient.SqlConnection and SqlClient.SqlCommand instead of an actual ORM (or, in a better case scenario, has created his own ORM); the thought of using LINQ or Entity Framework or really anything other than his own hastily homebrew solution has never occurred to him.  He doesn't understand TDD and considers “testing” to be using the .NET debugger to step through code, or simply loading up an app and entering some values to see if it works.  He doesn't really understand SOLID, and he doesn't care to.  He's worked as a programmer for years, and that's all that counts.  Right?  WRONG. Who would you rather trust?  Someone with years of experience and who writes books, creates well-known software and is akin to a celebrity, or someone with no credibility outside their own minute environment who throws around their clout and company seniority as the "proof" of their ability?  Joe Everyman may have years of experience at Initrode as a programmer, and says to do things "his way" but someone like Jeremy Miller or Ayende Rahien have years of experience at companies just like Initrode, THEY know ten times more than Joe Everyman knows or could ever hope to know, and THEY say to do things "this way". Here's another way of thinking about it: If you wanted to get into politics and needed advice on the best way to do it, would you rather listen to the mayor of Hicktown, USA or Barack Obama?  One is a small-time nobody while the other is very well-known and, as such, would probably have much more accurate and beneficial advice. NOTE: The selection of Barack Obama as an example in no way, shape, or form suggests a political affiliation or political bent to this post or blog, and no political innuendo should be mistakenly read from it; the intent was merely to compare a small-time persona with a well-known persona in a non-software field.  Feel free to replace the name "Barack Obama" with any well-known Congressman, Senator or US President of your choice. DIY Considered Harmful I will say right now that the homebrew development environment is the WORST one for an aspiring programmer, because it relies on nothing outside it's own little box - no useful skill outside of the small pond.  If you are forced to use some half-baked, homebrew ORM created by your Director of Software, you are not learning anything valuable you can take with you in the future; now, if you plan to stay at Initrode for 10 years like Joe Everyman, this is fine and dandy.  However if, like most of us, you want to advance your career outside a very narrow space you will do more harm than good by sticking it out in an environment where you, to be frank, know better than everybody else because you are aware of alternative and, in almost most cases, better tools for the job.  A junior developer who understands why the SOLID principles are good to follow, or why TDD is beneficial, or who knows that it's better to use NHibernate/Subsonic/EF/LINQ/well-known ORM versus some in-house one knows better than a senior developer with 20 years experience who doesn't understand any of that, plain and simple.  Anyone who disagrees is either a liar, or someone who, just like Joe Everyman, Lead Developer, relies on seniority and tenure rather than adapting their knowledge as things evolve. In many cases, the Joe Everymans of the world act this way out of fear - they cannot possibly fathom that a “junior” could know more than them; after all, they’ve spent 10 or more years in the same company, doing the same job, cranking out the same shoddy software.  And here comes a newbie who hasn’t spent 10+ years doing the same things, with a fresh and often radical take on the craft, and Joe Everyman is afraid he might have to put some real effort into his career again instead of just pointing to his 10 years of service at Initrode as “proof” that he’s good, or that he might have to learn something new to improve; in most cases the problem is Joe Everyman, and by extension Initrode itself, has a mentality of just being “good enough”, and mediocrity is the rule of the day. A Thorn Bush is No Place for a Phoenix My advice is that if you work on a team where they don't use the best practices that some of the most famous developers in our field say is the "right" way to do things (and have legions of people who agree), and YOU are aware of these practices and can see why they work, then LEAVE the company.  Find a company where they DO care about quality, and craftsmanship, otherwise you will never be happy.  There is no point in "dumbing" yourself down to the level of your co-workers and slinging code without care to craftsmanship.  In 95% of these situations there will be no point in bringing it to the attention of Joe Everyman because he won't listen; he might even get upset that someone is trying to "upstage" him and fire the newbie, and replace someone with loads of untapped potential with a drone that will just nod affirmatively and grind out the tasks assigned without question. Find a company that has people smart enough to listen to the "best and brightest", and be happy.  Do not, I repeat, DO NOT waste away in a job working for ignorant people.  At the end of the day software development IS a craft, and a level of craftsmanship is REQUIRED for any serious professional.  When you have knowledgeable people with the credibility to back it up saying one thing, and small-time people who are, to put it bluntly, nobodies in the field saying and doing something totally different because they can't comprehend it, leave the nobodies to their own devices to fade into obscurity.  Work for a company that uses REAL software engineering techniques and really cares about craftsmanship.  The biggest issue affecting our career, and the reason software development has never been the respected, white-collar career it was meant to be, is because hacks and charlatans can pass themselves off as professional programmers without following a lick of good advice from programmers much better at the craft than they are.  These modern day snake-oil salesmen entrench themselves in companies by hoodwinking non-technical businesspeople and customers with their shoddy wares, end up in senior/lead/executive positions, and push their lack of knowledge on everybody unfortunate enough to work with/for/under them, crushing any dissent or voices of reason and change under their tyrannical heel and leaving behind a trail of dismayed and, often, unemployed junior developers who were made examples of to keep up the facade and avoid the shadow of doubt being cast upon them. To sum this up another way: If you surround yourself with learned people, you will learn.  Surround yourself with ignorant people who can't, as the saying goes, see the forest through the trees, and you'll learn nothing of any real value.  There is more to software development than just writing code, and the end goal should not be just "shipping software", it should be shipping software that is extensible, maintainable, and above all else software whose creation has broadened your knowledge in some capacity, even if a minor one.  An eager newbie who knows theory and thirsts for knowledge can easily be moulded and taught the advanced topics, but the same can't be said of someone who only cares about the finish line.  This industry needs more people espousing the benefits of software craftsmanship and proper software engineering techniques, and less Joe Everymans who are unwilling to adapt or foster new ways of thinking. Conclusion - I Cast “Protection from Fire” I am fairly certain this post will spark some controversy and might even invite the flames.  Please keep in mind these are opinions and nothing more.  A little healthy rant and subsequent flamewar can be good for the soul once in a while.  To paraphrase The Godfather: It helps to get rid of the bad blood.

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• Object model design: collections on classes

  - by Luke Puplett

  Hi all, Consider Train.Passengers, what type would you use for Passengers where passengers are not supposed to be added or removed by the consuming code? I'm using .NET Framework, so this discussion would suit .NET, but it could apply to a number of modern languages/frameworks. In the .NET Framework, the List is not supposed to be publicly exposed. There's Collection and ICollection and guidance, which I tend to agree with, is to return the closest concrete type down the inheritance tree, so that'd be Collection since it is already an ICollection. But Collection has read/write semantics and so possibly it should be a ReadOnlyCollection, but its arguably common sense not to alter the contents of a collection that you don't have intimate knowledge about so is it necessary? And it requires extra work internally and can be a pain with (de)serialization. At the extreme ends I could just return Person[] (since LINQ now provides much of the benefits that previously would have been afforded by a more specified collection) or even build a strongly-typed PersonCollection or ReadOnlyPersonCollection! What do you do? Thanks for your time. Luke

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