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• VB.net Network Graph code/algorithm

  - by Jens

  For a school project we need to visualise a computer network graph. The number of computers with specific properties are read from an XML file, and then a graph should be created. Ad random computers are added and removed. Is there any open source project or algorithm that could help us visualising this in VB.net? Or would you suggest us to switch to java. Update: We eventually switched java and used the Jung libraries because this was easier for us to understand and implement.

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• Error on Sending mail asp.net mvc

  - by sagar

  Hi whenever i am trying to send the mail from my application on account creation i get the following error. User not local; please try a different path. The server response was: Bad Recipient at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception) Smtp settings provided by client is all right.When i replace my smtp setting with gmail smtp settings on web.config mail is going smoothly.but when my smtp setting is set to the smtp setting provided by client above error occurs. I have the folloeing in my web.config.

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• .NET ORM and Security

  - by Sphynx

  We're going to use an ORM tool with a .NET desktop application. The tool allows creation of persistent classes. It generates all database tables automatically. In addition to other data, our system needs to store user credentials, and deliver access control. The question is, is there any possibility of access control by means of ORM, without creating the database authentication mechanisms manually? Is there any product on the market which allows this? We thought of limiting the access in the program itself, but users can easily access the database directly, and bypass the program limitations. Thanks.

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• Dynamically creating a treeview in HTML with indent lines in ASP.Net

  - by Ben

  Hi, im quite new to HTML, and am trying to create a proffessional looking TreeView. I can not use the in built treeview in ASP.Net as i need to point the target of the selection to another frame (I have tried, and this doesn't seem possible). My treeview is built up as follows: Folder1 ChildOne ChildTwo ChildThree Folder2 ChildOne ChildTwo ChildThree I have the collapsing of the folders working, but would like to know how to format this treeview so it has dotted lines down to the child nodes (as most treeviews tend to have). How would i go about this? Cheers.

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• What libraries are available for manipulating super large images in .Net

  - by tpower

  I have some really large files for example 320 MB tif file with 14000 X 9000 pixels. The operations I need to perform are basically scaling the images to get smaller versions of it and breaking the image into tiles. My code works fine with small files and I use the .Net Bitmap objects but I will occasionally get Out of Memory exceptions for larger files. I've tried using the FreeImage libraries FreeImageBitmap but have the same problems. I'm using something like the following to scale the image: using (Graphics g = Graphics.FromImage((Image)result)) { g.DrawImage( source, xOffset, yOffset, source.Width * scale, source.Height * scale ); } Ideally I'd like a third party library to do all the hardwork, but if you have any tips or resources with more information I would appreciate it.

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• Restrict access to a specific URL, running on IIS7 / ASP.NET

  - by frankadelic

  I am deploying a public ASP.NET website on an IIS7 web farm. The application runs on 3 web servers and is behind a firewall. We want to create a single page on the website that is accessible only to internal users. It is primarily used for diagnostics, trigger cache expiry, etc. /admin/somepage.aspx What is the best way to control access to this page? We need to: Prevent all external (public) users from accessing the URL. Permit specific internal users to access the page, only from certain IPs or networks. Should this access control be done at the (a) network level, (b) application level, etc.?

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• SimpleModal, no response from ASP.NET button

  - by bhsstudio

  Hi, I have the following code. $(document).ready(function() { $('#btnOpen').click(function(e) { $('#content').modal({ onOpen: function(dialog) { dialog.overlay.fadeIn('slow', function() { dialog.data.hide(); dialog.container.fadeIn('slow', function() { dialog.data.slideDown('slow'); }); }); }, onClose: function(dialog) { dialog.data.fadeOut('slow', function() { dialog.container.slideUp('slow', function() { dialog.overlay.fadeOut('slow', function() { $.modal.close(); // must call this! }); }); }); } }); }); $('#btnClose').click(function(e) { $.modal.close(); }); If I use <a hrf ="#" id="btnOpen">Open</a>, it works perfectly. If I replace the with an ASP.net Button, <asp:Button ID="btnOpen" runat="server" Text="Open" />, nothing happened... Any help please?

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• datatable works in C# winform but not ASP.NET

  - by Charles Gargent

  Hi I have created a class that returns a datatable, when I use the class in a c# winform the dataGridView is populted corectly using the following code dataGridView1.DataSource = dbLib.GetData(); However when I try the same thing with ASP.NET I get a Object reference not set to an instance of an object. using the following code GridView1.DataSource = dbLib.GetData(); GridView1.DataBind(); What am I doing wrong / missing Thanks EDIT for the curios here is the dbLib class public static DataTable GetData() { SQLiteConnection cnn = new SQLiteConnection("Data Source=c:\\test.db"); SQLiteCommand cmd = new SQLiteCommand("SELECT count(Message) AS Occurances, Message FROM evtlog GROUP BY Message ORDER BY Occurances DESC LIMIT 25", cnn); cnn.Open(); SQLiteDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection); DataTable dt = new DataTable(); dt.Load(dr); return dt; }

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• Plugin architecture in .net: unloading

  - by henchman

  Hello everybody, I need to implement a plugin architecture within c#/.net in order to load custom user defined actions data type handling code for a custom data grid / conversion / ... from non-static linked assembly files. Because the application has to handle many custom user defined actions, Iam in need for unloading them once executed in order to reduce memory usage. I found several good articles about plugin architectures, eg: ExtensionManager PluginArchitecture ... but none of them gave me enough sausage for properly unloading an assembly. As the program is to be distributed and the user defined actions are (as the name states) user defined: how to i prevent the assembly from executing malicious code (eg. closing my progra, deleting files)? Are there any other pitfalls one of you has encountered?

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• .net Diagnostics best practices?

  - by mamu

  We initially didn't use any logging or debug tracing but after spending few weeks to trace down some data corruption we decided to put required Debug.Write and Trace for production and Debug.Assert So now question is What is the best practice to use debug and trace logging. I am just looking for some thing generic. public void AddRectodatabase(object record) { Debug.WriteLine(record.ToString()); Trace.WriteLine(record.ToString()); // Add it to databse Debug.Assert(true, "Use this on case by case basis"); } Is this good enough for general purpose, am i doing anything wrong in there? We want to stick with .net System.Diagnostics over other alternatives like log4net. Is there any thing else useful in System.Diagnostics?

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• toggle the grid cells value, ASP.net 3.5

  - by user92027

  Hi For my web application, I want a 10*10 (100 cells which is created dynamically) grid to be displayed in the following manner. 0) Initially all the cells' color is green. 1) If i click on any cell its color becomes red if it is green and if i click again it becomes red.(Toggle the cell color) 2) I should be able to display dynamic number of link buttons in each cell.On the click of which it pop ups a window. Are there any control available for this? Or how can i implement this functionality. I am using ASP.net 3.5.

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• detect page refresh jQuery or C# ASP.Net

  - by Marco

  Hello, I was searching for a way of detecting in my C# code if the page had been refreshed (f5). First I don’t know if a jQuery/JavaScript solution would be better than a fully C# ASP.Net. So... the first question would be: What would make you choose one over the other? And the third, and most important part, is if someone would help me with this. Some good tutorial, or article… anything. I tried some solutions out there… but maybe, because of my lack of knowledge they didn’t work. Thanks in advance.

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• ASP.NET with VS 2008 How to Run Root "/" with Local Web Server

  - by harrije

  I want to use the built-in web server for VS 2008 and have it run my web-site project as the top level root "/". Instructions for VS 2005 can be found at: http://weblogs.asp.net/scottgu/archive/2006/12/19/tip-trick-how-to-run-a-root-site-with-the-local-web-server-using-vs-2005-sp1.aspx My problem is with step 3 of the instructions. When the the web-site project node is selected, right click never gives me an option to select a property-grid like that shown under step 3. Nor could I find another way in the menu or tool bar to get the property-grid. I don't know if the UI difference I'm seeing has to do with me using VS 2008 and the instructions are for VS 2005 or what? How do I get the web-site property-grid for VS 2008, or is there an alternative way to get the root setup I want?

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• Performance of .NET ILMerged assemblies

  - by matt

  I have two .NET libraries: "Foo.Bar" and "Foo.Baz". "Foo.Bar" is self-contained, while "Foo.Baz" references "Foo.Bar". Assuming I do the following: Use ILMerge to merge "Foo.Bar.dll" with "Foo.Baz.dll" into "Foo1.dll". Create a new solution containing the entirity of both "Foo.Bar" and "Foo.Baz" (since I have access to their source code), and compile this into "Foo2.dll". Will there be any differences in the performance of Foo1.dll and Foo2.dll when using their functionality from an external project? If so, how significant is this performance difference, and is it a once-off (on load?) or ongoing difference? Are there any other pros or cons with either approach?

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• What is a .NET managed module?

  - by Abhijeet Patel

  I know it's a Windows PE32, but I also know that the unit of deployment in .NET is an assembly which in turn has a manifest and can be made up of multiple managed modules. My questions are : 1) How would you create multiple managed modules when building a project such as a class lib or a console app etc. 2) Is there a way to specify this to the compiler(via the project properties for example) to partition your source code files into multiple managed modules. If so what is the benefit of doing so? 3)Can managed modules span assemblies? 4)Are separate file created on disk when the source code is compiled or are these created in memory and directly embedded in an assembly?

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• PayPal IPN & ASP.NET MVC

  - by Wayne

  Hello - I have a strange problem that somebody can hopefully help me with. For a while now I have been using PayPal's IPN service for our website. In order to test it I have a port opened up on our firewall pointing to my machine. This has been working great with no problems at all. I recently upgraded to the RTM release of ASP.NET MVC and now things are not working. I can navigate to my IPN handler from the outside world so I know it's not my connection or a firewall issue. It simply refuses to recieve any PayPal IPN messages. I am puzzled why the page can be accessed yet the PayPal IPN server wont connect to it. I realize there could be a 1000 different reasons for this, but I am hoping somebody out there can point me in the right direction!

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• Parameter passing Vs Table Valued Parameters Vs XML to SQL 2008 from .Net Application

  - by Harryboy

  As We are working on a asp .net project there three ways one can update data into database when there are multiple rows updation / insertion required Let's assume we need to update employee education detail (which could be 1,3,5 or 10 records) Method to Update Data Pass value as parameter (Traditional approach), If 10 records are there then 10 round trip required Pass data as xml and write logic inside your stored procedure to get that data from xml and update the table (only single roundtrip required) Use Table valued parameters (only single roundtrip required) Note : Data is available as List, so i need to convert it to xml or any other format if i need to pass. There are no. of places in entire application we need to update data in bulk (or multiple records) I just need your suggestions that Which method will be faster (please mention if there are some other overheads) Manageability or testability concern with any approach Any other bottleneck or issue with any of the approach (Serialization /Deserialization concern or limit on size of the data passing) Any other method you suggest for same operations Thanks

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• Starting a new process in a asp.net web service

  - by Deumber

  I have the following code: public void BeginConvert(object data) { ConverterData cObject = (ConverterData)data; string argument = string.Format("-i \"{0}\" -b {1} \"{2}\"", cObject.Source, compression, cObject.Destiny); Process converterProcess = new Process(); converterProcess.StartInfo.FileName = ffPath; converterProcess.StartInfo.Arguments = argument; converterProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden; converterProcess.Start(); converterProcess.WaitForExit(); } I use it in a webservice, i start it in a new thread and it return exit code 1 (error, i'm trying to do a video convertion with ffmpeg library), i impersonate ASP.NET to use a local account with permissions to read and write files, when i run it in my machine running or debugging it works but know thta the web service is running in IIS doest'n. Could someone help me?

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• My ASP.NET page is making postback on web server and not on local host

  - by Rizwan Aaqil

  I have created a website in ASP.NET = www.vif-tech.com/BidsOnline When I am running it on Localhost using Visual Studio 2008, its running perfectly without any postback because I am using Ajax Update Panels (where data is changing constantly). But when I am running from my web server i.e. www.vif-tech.com/BidsOnline, its making postbacks every seconds. Even I tried changing connection string on my localhost and tried connecting to main database (not on my localhost), it's still making postbacks. Is there some error in my DB or page ?

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• .Net OutOfMemory on Server but not Desktop

  - by Jörg Battermann

  Is it possible that the .Net framework behaves differently when it comes to garbage collection / memory limitations on server environments? I am running explicitly x86 compiled apps on a 64bit server machine with 32gbs of physical ram and I am running out of memory (SystemOutOfMemoryException) even though nothing but that particular app is running and the server/all other apps utilize 520mb total.. but I cannot reproduce that behaviour on my own (client win7) machine. Now I know that the app -is- memory intensive, but why is it causing problems on the server and not on the client?

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• How to execute in JavaScript function in ASP.NET using C#

  - by shree-khanal

  i have a textarea which i want to disable when I check a checkbox. I made a working demo in plain HTML and JavaScript , but When I am migrating to Asp.net, neither the function is being executed nor I can keep the OnSelect event in my check box. <asp:CheckBox ID="ChkOthers" runat="server" Text="Others(Please Explain)" Width="205px" AutoPostBack="True" OnCheckedChanged="ChkOthers_CheckedChanged" /> <asp:TextBox ID="TxtOtherReason" runat="server" MaxLength="1024" TextMode="MultiLine" /> i want to create client side validation when check box is checked textbox is enable else disable.

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• Encrypt URL in asp.net

  - by Zerotoinfinite

  Hi All, My site is in asp.net 3.5 and C#. I am sending link to my user through mail, now I want to send each user a specific URL. so instead of sending the clear text I want to send link with encrypted string URL, which I will decrypt on my home page. Like instead of www.mysite.aspx\mypage?userId=12 i'll send www.mysite.aspx\mypage?UserId=)@kasd12 and the same i'll decrypt on my page so that I'll get the userId = 12. Please let me know if my approach is correct and not and how can I encrypt & decrypt the string in simplest and easier manner. Thanks in advance.

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• Adding items to Model Collection in ASP.NET MVC

  - by Stacey

  In an ASP.NET MVC application where I have the following model.. public class EventViewModel { public Guid Id { get; set; } public List<Guid> Attendants { get; set; } } passed to a view... public ActionResult Create(EventViewModel model) { // ... } I want to be able to add to the "Attendants" Collection from the View. The code to add it works just fine - but how can I ensure that the View model retains the list? Is there any way to do this without saving/opening/saving etc? I am calling my addition method via jQuery $.load. public void Insert(Guid attendant) { // add the attendant to the attendees list of the model - called via $.load } I would also like to add there is no database. There is no storage persistence other than plain files.

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• Ado.Net Entity produces "namespace cannot be found"

  - by Dave

  I've seen several possible solutions to this, but none have worked for me. After adding a ADO.NET Entity Data Model to my .Net Forms C# web project, I am unable to use it. Perhaps I made a mistake adding it? The name of the file added is QcFormData.edmx. In my code, perhaps I'm instantiating it incorrectly? I tried adding the line: QcFormDataContainer db = new QcFormDataContainer(); It appears in Intellisense, but when compiling I get the error : Error 13 The type or namespace name 'QcFormDataContainer' could not be found (are you missing a using directive or an assembly reference?) I've followed the suggestions that I found online that did not help: 1) made sure there is "using System.Data.Entity" 2) made sure the dll exists. 3) made sure the reference exists. 4) one post said use using System.Web.Data.Entity; but I do not see that available. What am I missing? QcFormData.edmx <?xml version="1.0" encoding="utf-8"?> <edmx:Edmx Version="3.0" xmlns:edmx="http://schemas.microsoft.com/ado/2009/11/edmx"> <!-- EF Runtime content --> <edmx:Runtime> <!-- SSDL content --> <edmx:StorageModels> <Schema Namespace="MyCocoModel.Store" Alias="Self" Provider="System.Data.SqlClient" ProviderManifestToken="2008" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" xmlns="http://schemas.microsoft.com/ado/2009/11/edm/ssdl"> <EntityContainer Name="MyCocoModelStoreContainer"> <EntitySet Name="QcFieldValues" EntityType="MyCocoModel.Store.QcFieldValues" store:Type="Tables" Schema="dbo" /> </EntityContainer> <EntityType Name="QcFieldValues"> <Key> <PropertyRef Name="ID" /> </Key> <Property Name="ID" Type="int" Nullable="false" StoreGeneratedPattern="Identity" /> <Property Name="FieldID" Type="nvarchar" MaxLength="100" /> <Property Name="FieldValue" Type="nvarchar" MaxLength="100" /> <Property Name="DateTimeAdded" Type="datetime" /> <Property Name="OrderReserveNumber" Type="nvarchar" MaxLength="50" /> </EntityType> </Schema> </edmx:StorageModels> <!-- CSDL content --> <edmx:ConceptualModels> <Schema Namespace="MyCocoModel" Alias="Self" p1:UseStrongSpatialTypes="false" xmlns:annotation="http://schemas.microsoft.com/ado/2009/02/edm/annotation" xmlns:p1="http://schemas.microsoft.com/ado/2009/02/edm/annotation" xmlns="http://schemas.microsoft.com/ado/2009/11/edm"> <EntityContainer Name="MyCocoEntities" p1:LazyLoadingEnabled="true"> <EntitySet Name="QcFieldValues" EntityType="MyCocoModel.QcFieldValue" /> </EntityContainer> <EntityType Name="QcFieldValue"> <Key> <PropertyRef Name="ID" /> </Key> <Property Name="ID" Type="Int32" Nullable="false" p1:StoreGeneratedPattern="Identity" /> <Property Name="FieldID" Type="String" MaxLength="100" Unicode="true" FixedLength="false" /> <Property Name="FieldValue" Type="String" MaxLength="100" Unicode="true" FixedLength="false" /> <Property Name="DateTimeAdded" Type="DateTime" Precision="3" /> <Property Name="OrderReserveNumber" Type="String" MaxLength="50" Unicode="true" FixedLength="false" /> </EntityType> </Schema> </edmx:ConceptualModels> <!-- C-S mapping content --> <edmx:Mappings> <Mapping Space="C-S" xmlns="http://schemas.microsoft.com/ado/2009/11/mapping/cs"> <EntityContainerMapping StorageEntityContainer="MyCocoModelStoreContainer" CdmEntityContainer="MyCocoEntities"> <EntitySetMapping Name="QcFieldValues"> <EntityTypeMapping TypeName="MyCocoModel.QcFieldValue"> <MappingFragment StoreEntitySet="QcFieldValues"> <ScalarProperty Name="ID" ColumnName="ID" /> <ScalarProperty Name="FieldID" ColumnName="FieldID" /> <ScalarProperty Name="FieldValue" ColumnName="FieldValue" /> <ScalarProperty Name="DateTimeAdded" ColumnName="DateTimeAdded" /> <ScalarProperty Name="OrderReserveNumber" ColumnName="OrderReserveNumber" /> </MappingFragment> </EntityTypeMapping> </EntitySetMapping> </EntityContainerMapping> </Mapping> </edmx:Mappings> </edmx:Runtime> <!-- EF Designer content (DO NOT EDIT MANUALLY BELOW HERE) --> <Designer xmlns="http://schemas.microsoft.com/ado/2009/11/edmx"> <Connection> <DesignerInfoPropertySet> <DesignerProperty Name="MetadataArtifactProcessing" Value="EmbedInOutputAssembly" /> </DesignerInfoPropertySet> </Connection> <Options> <DesignerInfoPropertySet> <DesignerProperty Name="ValidateOnBuild" Value="true" /> <DesignerProperty Name="EnablePluralization" Value="True" /> <DesignerProperty Name="IncludeForeignKeysInModel" Value="True" /> <DesignerProperty Name="CodeGenerationStrategy" Value="None" /> </DesignerInfoPropertySet> </Options> <!-- Diagram content (shape and connector positions) --> <Diagrams></Diagrams> </Designer> </edmx:Edmx>

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• ASP.Net: Scheduled tasks in a shared environment.

  - by UpTheCreek

  This is really an extension of this question, which asked the best way to schedule tasks which need to be performed periodically within ASP.NET in a normal environment. However, I would like to ask this specifically for a Shared Hosting Environment (most of the answers to the previous question would not work in a shared environment as far as I know). One obvious solution would be to have a page which is responsible to performing the tasks on the hosted machine, and call this page from another machine (that you have full control over) using e.g. a windows scheduled task. This is a bit nasty though - are there any better approaches?

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