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• Access View Missing in Access Data Source Configuration Wizard

  - by Steven

  I added an AccessDataSource to my ASPX page. I clicked on "Configure Data Source...", chose my Access database, and clicked the "Next " button. A couple of my queries / views are missing from the list. What might be causing this?

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• bundle .NET dlls to run application in .NET-less machine?

  - by Camilo Martin

  AFAIK, ngen turns MSIL into native code (also reffered to as pre-JIT), however I never payed too much attention at it's startup performance impact. Ngen'd applications still require the .NET base class libraries (the runtime). Since the base class libraries have everything our .NET assemblies need (correct?) would it be possible to ship the framework's DLLs with my ngen'd application so that it does not require the runtime to be installed? (e.g., the scenario for most Windows XP machines) Oh, and please don't bother mentioning Remotesoft's Salamander Linker or Xenocode's Postbuild. They are not for my (and many's) current budget (and they seem to simply bundle the framework in a virtualized enviroinment, which means big download sizes and slow startup times I believe) EDIT: I know now, ngen doesn't do what I thought it did. But is it possible to bundle the .NET files with an application, without using a VM?

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• Parsing plain Win32 PE File (Exe/DLL) in C#.NET

  - by Usman

  Hello, I need to parse plain Win32 DLL/Exe and need to get all imports and exports from it and to show it on console or GUI(say Win Forms). Is it possible to parse Win32 DLL/Exe in C#.NET, read its export table,import table and get managed types from it. As its unmanaged PE(.NET doesn't allows you to convert unmanaged PE files to managed .NET assemblies, only it generates COM managed assemblies). So how to parse export and import tables of PE files and take all methods(signatures from it) in managed form.(e.g if char* as argument, it should display as IntPtr) Regards Usman

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• Using FluentNHibernate + SQLite with .Net4?

  - by stiank81

  I have a WPF application running with .Net3.5 using FluentNHibernate, and all works fine. When I upgraded to VS2010 I ran into some odd problems, but after changing to use x64 variant of SQLite it worked fine again. Now I want to change to use .Net4, but this has turned into a more painful experience then I expected.. When calling FluentConfiguration.BuildConfiguration I get an exception thrown: FluentConfigurationException unhandled An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail The inner exception gives us more information: Message = "Could not create the driver from NHibernate.Driver.SQLite20Driver, NHibernate, Version=2.1.2.4000, Culture=neutral, PublicKeyToken=aa95f207798dfdb4." It has an InnerException again: Exception has been thrown by the target of an invocation. Which again has an InnerException: The IDbCommand and IDbConnection implementation in the assembly System.Data.SQLite could not be found. Ensure that the assembly System.Data.SQLite is located in the application directory or in the Global Assembly Cache. If the assembly is in the GAC, use element in the application configuration file to specify the full name of the assembly. Now - to me it sounds like it doesn't find System.Data.SQLite.dll, but I can't understand this. Everywhere this is referenced I have "Copy Local", and I have verified that it is in every build folder for projects using SQLite. I have also copied it manually to every Debug folder of the solution - without luck. Notes: This exact same code worked just fine before I upgraded to .Net4. I did see some x64 x86 mismatch problems earlier, but I have switched to use x86 as the target platform and for all referenced dlls. I have verified that all files in the Debug-folder are x86. I have tried the precompiled Fluent dlls, I have tried compiling myself, and I have compiled my own version of Fluent using .Net4. I see that there are also others that have seen this problem, but I haven't really seen any solution yet. After @devio's answer I tried adding a reference to the SQLite dll. This didn't change anything, but I hope I made it right though.. This is what I added to the root node of the app.config file: <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <qualifyAssembly partialName="System.Data.SQLite" fullName="System.Data.SQLite, Version=1.0.60.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" /> </assemblyBinding> </runtime> Anyone out there using Fluent with .Net4 and SQLite successfully? Help! I'm lost...

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• How to complie x64 asp.net website?

  - by Eran Betzalel

  I'm trying to compile (using Visual Studio) an ASP.Net website with the Chilkat library. The compilation fails due to this error: Could not load file or assembly 'ChilkatDotNet2, Version=9.0.8.0, Culture=neutral, PublicKeyToken=eb5fc1fc52ef09bd' or one of its dependencies. An attempt was made to load a program with an incorrect format. I've been told that this error occurs because of platform noncompliance. The weird thing is that although the compilation fails, the site works once accessed from a browser. My theory is that the IIS compilation uses csc.exe compiler from the Framework64 (64 bit) folder while the Visual Studio uses csc.exe compiler from the Framework (32 bit) folder. If this is acually it, how can I configure my Visual studio to run with the 64 bit compiler for ASP.Net sites? This is my current development configuration: Windows 7 (x64). Visual Studio 2008 Pro (x86 of course...). Chilkat library (x64) IIS/Asp.net (x64).

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• Scrambling URLS for dynamic data

  - by ggonsalv

  What is the best method to obfuscate the urls created in Dynamic Data? eg \Products\List.aspx?ProductId=2 could become \Products\List.aspx?x=UHJvZHVjdElkPTI= where "ProductId=2" is base 64 encoded to prevent casual snooping on \Products\List.aspx?ProductId=3 \Products\List.aspx?ProductId=4 etc...? I will probably have to inherit from an existing object and override some function The question is which object and what function GetActionPath of the Metamodel object seems interesting, but how does the DynamicRoute "{table}/{Action}.aspx" play in into it... Right now on Asp.net 1.1 site I use an custom implementation of the following code. http://www.mvps.org/emorcillo/en/code/aspnet/qse.shtml It is HTTPModule that uses regular expression to rewrite all the querystrings and also with reflection changes the Querystring collection with decoded values. So where is the hook to affect the change.

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• Extract data from CardScan Database using C#

  - by Umar Siddique

  I need to extract data from .CDB (CardScan Database) using C#. How i can do this? Thanks

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• How to Track F5/Refresh in ASP.Net

  - by Everest

  I am using VS 2005, C# 2, ASP.Net 2.0 I am unable to find out how to track that user pressed F5/Ctrl+F5/ Open a new Window(Ctrl + N) in ASP.Net. I know that there is a Page.IsPostBack property, which tells that a page is loaded in response to an action taken by user. I am just curious to know, that why isn't there a property as IsRefresh or Page.IsRefresh in ASP.Net, which will return true, whenever user takes any of the above actions. Is there a way to know this? Actually my problem is that i have a DLL using which all of my aspx pages are inherited, I have to insert some values in a table whenever the page is opened for the first time that's it, if user just opens the page or do not take any action, an entry should be inserted into the database, but as far as I have tried, I controlled it anyhow using the Page.IsPostBack property, but I got stuck in the refresh case, as it is inserting records unconditionally.

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• ASP.NET or ASP.NET MVC or Silverlight or a mixture of all ?

  - by Elmex

  I want to start to implement a new web application from the scratch. I have 2 years experiences with ASP.NET. Now Microsoft offers ASP.NET MVC. I have read a little about the concepts behind, but I am not sure if I should use the classic ASP.NET variant or the new one. Perhaps it makes sense to mix it ? Or should I move to Silverlight ? What do you thing ? What are the advantages and disadvantages of all these variants ?

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• Sync Vs. Async Sockets Performance in .NET

  - by Michael Covelli

  Everything that I read about sockets in .NET says that the asynchronous pattern gives better performance (especially with the new SocketAsyncEventArgs which saves on the allocation). I think this makes sense if we're talking about a server with many client connections where its not possible to allocate one thread per connection. Then I can see the advantage of using the ThreadPool threads and getting async callbacks on them. But in my app, I'm the client and I just need to listen to one server sending market tick data over one tcp connection. Right now, I create a single thread, set the priority to Highest, and call Socket.Receive() with it. My thread blocks on this call and wakes up once new data arrives. If I were to switch this to an async pattern so that I get a callback when there's new data, I see two issues The threadpool threads will have default priority so it seems they will be strictly worse than my own thread which has Highest priority. I'll still have to send everything through a single thread at some point. Say that I get N callbacks at almost the same time on N different threadpool threads notifying me that there's new data. The N byte arrays that they deliver can't be processed on the threadpool threads because there's no guarantee that they represent N unique market data messages because TCP is stream based. I'll have to lock and put the bytes into an array anyway and signal some other thread that can process what's in the array. So I'm not sure what having N threadpool threads is buying me. Am I thinking about this wrong? Is there a reason to use the Async patter in my specific case of one client connected to one server?

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• Comet implementation for ASP.NET?

  - by Hitchhiker

  I've been looking at ways to implement gmail-like messaging inside a browser, and arrived at the Comet concept. However, I haven't been able to find a good .NET implementation that allows me to do this within IIS (our application is written in ASP.NET 2.0). The solutions I found (or could think of, for that matter) require leaving a running thread per user - so that it could return a response to him once he gets a message. This doesn't scale at all, of course. So my question is - do you know of an ASP.NET implementation for Comet that works in a different way? Is that even possible with IIS?

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• Creating a future proof .NET 3.5 SP1 installer prerequisite for setup.exe AND the .MSI

  - by Ruben Bartelink

  I've demanded .NET 3.5 SP1 a la http://stackoverflow.com/questions/88136/will-a-vs2008-setup-project-update-net-3-5-sp1. This makes the setup.exe check correctly. I've also added a "SP1" launch condition to my MSI so it doesn't let the user install my .NET 3.5SP1 app via launching the MSI (and replaced the [VSDNETMSG] in the Framework condition message with one that actually mentions SP1). From a future proofing point of view, this feels wrong. I want the condition to be: (NETVer=3.5 AND Net35SPLevel=1) OR (NETVer=>3.5) not (NETVer=3.5 AND Net35SPLevel=1) Is there any way to do that? The framework check doesnt have a condition property to allow me to add a sub-condition... Yes, I could also just not worry my pretty little head about it :P If one of the MS versioning experts out there reads this, if you're going to put stuff that code depends on into SPs, can you please make the installer be able to check for it OOTB. (I really wish they had come up with a better numbering scheme - the world and its dog could see that this was going to get confusing)

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• Deploying Asp.Net MVC 2 /C# 4.0 application on IIS 6

  - by Mose

  Hi, I got a problem migrating from VS.Net 2008 / MVC 1 to VS.NET 2010 (+C# 4.0) / MVC 2 The web.config has been updated, the site runs well in Cassini, but my problem now is deploying on IIS 6. I updated the web site to run using ASP.Net 4, but whatever URL I try, I always have a 404 error. It's as if the routing was not taken into account (yes, the wildcard mapping has been done). I do not understand this mess and could not google anything interesting... Thanks for your suggestions ! O.

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• Most used .NET namespace

  - by Michael Prewecki

  What is your most commonly used namespace in .NET. I know it will vary greatly based upon the types of projects you develop but the stack overflow audience should provide a fairly decent sample set for the types of .NET projects being developed. I'm simply interest in the name of the namespace (one namespace per answer and no one person should have more than one answer, if someone else has the same answer as you then just upvote their answer). Try to be as specific as possible (so answering System, isn't helpful). I'm after this information to help new developers focus their attention on the most common .NET namespaces...there are after all thousands of them! To start off mine is almost certainly System.Collections.Generic, I use lists of things everywhere.

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• How should I provide access to this custom DAL?

  - by Casey

  I'm writing a custom DAL (VB.NET) for an ordering system project. I'd like to explain how it is coded now, and receive some alternate ideas to make coding against the DAL easier/more readable. The DAL is part of an n-tier (not n-layer) application, where each tier is in it's own assembly/DLL. The DAL consists of several classes that have specific behavior. For instance, there is an Order class that is responsible for retrieving and saving orders. Most of the classes have only two methods, a "Get" and a "Save," with multiple overloads for each. These classes are marked as Friend and are only visible to the DAL (which is in it's own assembly). In most cases, the DAL returns what I will call a "Data Object." This object is a class that contains only data and validation, and is located in a common assembly that both the BLL and DAL can read. To provide public access to the DAL, I currently have a static (module) class that has many shared members. A simplified version looks something like this: Public Class DAL Private Sub New End Sub Public Shared Function GetOrder(OrderID as String) as OrderData Dim OrderGetter as New OrderClass Return OrderGetter.GetOrder(OrderID) End Function End Class Friend Class OrderClass Friend Function GetOrder(OrderID as string) as OrderData End Function End Class The BLL would call for an order like this: DAL.GetOrder("123456") As you can imagine, this gets cumbersome very quickly. I'm mainly interested in structuring access to the DAL so that Intellisense is very intuitive. As it stands now, there are too many methods/functions in the DAL class with similar names. One idea I had is to break down the DAL into nested classes: Public Class DAL Private Sub New End Sub Public Class Orders Private Sub New End Sub Public Shared Function Get(OrderID as string) as OrderData End Function End Class End Class So the BLL would call like this: DAL.Orders.Get("12345") This cleans it up a bit, but it leaves a lot of classes that only have references to other classes, which I don't like for some reason. Without resorting to passing DB specific instructions (like where clauses) from BLL to DAL, what is the best or most common practice for providing a single point of access for the DAL?

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• Decrypting PKCS#7 encrypted data in C#

  - by Johnny Egeland

  I am working on a solution that needs to decrypt PKCS#7 encrypted data, preferably in C#. As far as I can see, the .NET api has support for this through the System.Security.Cryptography.Pkcs namespace. However it seems that the implementation can only work on byte arrays. So what do I do when I have a large encrypted file that does not fit into the memory? Am I missing something here, or is there another way to do this on a Stream level instead of using bytearrays?

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• .NET Membership with Repository Pattern

  - by Zac

  My team is in the process of designing a domain model which will hide various different data sources behind a unified repository abstraction. One of the main drivers for this approach is the very high probability that these data sources will undergo significant change in the near future and we don't want to be re-writing business logic when this happens. One data source will be our membership database which was originally implemented using the default ASP.Net Membership Provider. The membership provider is tied to the System.Web.Security namespace but we have a design guideline requiring that our domain model layer is not dependent upon System.Web (or any other implementation/environment dependency) as it will be consumed in different environments - nor do we want our websites directly communicating with databases. I am considering what would be a good approach to reconciling the MembershipProvider approach with our abstracted n-tier architecture. My initial feeling is that we could create a "DomainMembershipProvider" which interacts with the domain model and then implement objects in the model which deal with the repository and handle validation/business logic. The repository would then implement data access using our (as-yet undecided) ORM/data access tool. Are there are any glaring holes in this approach - I haven't worked closely with the MembershipProvider class so may well be missing something. Alternatively, is there an approach that you think will better serve the requirements I described above? Thanks in advance for your thoughts and advice. Regards, Zac

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• Loginview control asp.net mvc

  - by vikitor

  Hello all, I have been searching and haven't got luck, I got a tutorial to use the loginview control in order to display or hide parts of the views to different user roles in my application. The thing is that the tutorial I've found is for ASP.NET and I've been told by one of my colleages that it is the same framework for ASP.NET MVC but the way to use it is different. Have you got any good tutorial to recommend? EDIT: I've got all my application set up, and the login and the roles already configured (via asp.net membership provider). This is all already running. The thing is that if I have role a and role b I want role a to be able to actually see the links to the actions it is authorized to work with, and not b for example. If in the Index of my application I've got a link to "Edit" and only the role a can access to the action, then it will be displayed just for logged in users that belong to role a, and not to those who belong to role b Thank you, Vikitor

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• Ajax call with jQuery in ASP.NET MVC does not pass parameters

  - by desmati

  The Route is: routes.MapRoute( "Ajax", // Route name "BizTalk/Services/{action}", // URL with parameters new { // Parameter defaults controller = "BizTalk" } ); My Controller is: public JsonResult AjaxTest(string s, int i, bool b) { return Json("S: " + s + "," + "I: " + i + "," + "B: " + b); } My jQuery Code: $(document).ready(function() { $("#btn_test").click(function() { var s = "test"; var i = 8; var b = true; $.ajax({ type: "POST", cache: false, url: "/BizTalk/Services/AjaxTest", data: { i: i, s: s, b: b }, contentType: "application/json; charset=utf-8", dataType: "json", success: function(msg) { } }); }); });

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• Microsoft.Biztalk.explorerom.dll reference in asp.net application resulting system.nullreferenceexce

  - by sheetal.oza

  Hi, I have a asp.net application in order to start/stop applications and ports of Biztalk server 2006 r2. I have used "Microsoft.Biztalk.explorerom.dll (C:/Program Files/Biztalk Server 2006/Developer tool) " to achieve this. This is working fine on development machine since biz talk server is installed on local machine. But in the production environment (asp.net web server ,windows 2003 and iis 6.0)...this give System.nullreferenceexception (object reference not set..) at BtsCatalogExplorer explorer = (BtsCatalogExplorer)myGroup.CreateInstance(typeof(BtsCatalogExplorer)) my biztalk server and sql server are on two different box. In my setup (asp.net web application)..adding Microsoft.Biztalk.explorerom.dll and Microsoft.Biztalk.Applicationdeployment.engine.dll to GAC. But still no luck. Do i need to install biz talk server on my local machine even though I am connecting to different biz talk server?? And help is appreciated...

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• Excel Reader ASP.NET

  - by user304429

  I declared a DataGrid in a ASP.NET View and I'd like to generate some C# code to populate said DataGrid with an Excel spreadsheet (.xlsx). Here's the code I have: <asp:DataGrid id="DataGrid1" runat="server"/> <script language="C#" runat="server"> protected void Page_Load(object sender, EventArgs e) { string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\FileName.xlsx;Extended Properties=""Excel 12.0;HDR=YES;"""; // Create the connection object OleDbConnection oledbConn = new OleDbConnection(connString); try { // Open connection oledbConn.Open(); // Create OleDbCommand object and select data from worksheet Sheet1 OleDbCommand cmd = new OleDbCommand("SELECT * FROM [sheetname$]", oledbConn); // Create new OleDbDataAdapter OleDbDataAdapter oleda = new OleDbDataAdapter(); oleda.SelectCommand = cmd; // Create a DataSet which will hold the data extracted from the worksheet. DataSet ds = new DataSet(); // Fill the DataSet from the data extracted from the worksheet. oleda.Fill(ds, "Something"); // Bind the data to the GridView DataGrid1.DataSource = ds.Tables[0].DefaultView; DataGrid1.DataBind(); } catch { } finally { // Close connection oledbConn.Close(); } } </script> When I run the website, nothing really happens. What gives?

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• Silverlight Cannot find XML data source

  - by Nick

  Hello.. I am very new to Silverlight development. I understand that this is client side technology therefore the paradyme is differant from that of conventional ASP.NET development. Having said that, I don't understand where my server side code is deployed. I have a silver light \ MVC application. I am trying to read an XML document from within my 'Models' folder. The following peice of code is executed from within a class that is in the same location as the XML document, 'Models'. The load() results in a SystemIOFileNotFound exception. I noticed that when building the application the XML document is not laid down in the same location as the web project's assembly. I assume this is specific to the fact that this is a Silverlight project. Can someone tell me what I'm missing? _xdoc = new XDocument(); _xdoc = XDocument.Load(new Uri("videos.xml",UriKind.Relative).ToString());

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• trying to connect mysql with vb.net

  - by user225269

  I've found this at connection strings.com http://connectionstrings.com/mysql Do I need to download connector-net from this site: http://dev.mysql.com/downloads/connector/net/ I recycled the code that I used in connecting vb.net with ms sql: Imports system.data.sqlclient idnum = TextBox1.Text lname = TextBox2.Text fname = TextBox3.Text skul = TextBox4.Text Using sqlcon As New SqlConnection("Server=localhost;Port=3306;Database=testing;Uid=root;Pwd=nitoryolai123$%^;") sqlcon.Open() Dim sqlcom As New SqlCommand() sqlcom.Connection = sqlcon sqlcom.CommandText = "INSERT INTO [student](ID, LASTNAME, FIRSTNAME, SCHOOL) VALUES (@ParameterID, @ParameterLastName, @ParameterFirstName, @ParameterSchool)" sqlcom.Parameters.AddWithValue("@ParameterID", TextBox1.Text) sqlcom.Parameters.AddWithValue("@ParameterLastName", TextBox2.Text) sqlcom.Parameters.AddWithValue("@ParameterFirstName", TextBox3.Text) sqlcom.Parameters.AddWithValue("@ParameterSchool", TextBox4.Text) sqlcom.ExecuteNonQuery() End Using But I get this error: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) Please help, what solutions would you recommend to this problem?

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• Using C# and VB.NET in one solution

  - by Younes

  I'm busy on a small project to convert an Access2003 db to .NET. I am trying to integrate my functionality in an excisting project that is being used for Administration of some kind. The code in this project is vb.net. I started by setting up my Data Access Layer, which seems to work fine. I can make new web pages that acces the data I need. However when i start to use class files to set up my Business Logic Layer i can't build my project when using C# instead of VB. I Dislike VB and like to program in C# as i know the syntax alot better etc. Is it possible to program using C# knowing that VB.NET was the language chosen to buold the entire project on? If not, what will be the smartest way to integrate my module into the project using my favorite programming language? (Make a project and reference to the dll?)

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• ASP.NET csv excel issue with strange characters

  - by cfdev9

  I'm exporting a table of data to csv format, eg "COL1","COL2","COL3" "1","some text", "£232.00" "2","some more text", "£111.00" "3","other text", "£2.00" The code to export is fairly simple using an ashx handler context.Response.Clear() context.Response.ContentType = "text/csv" context.Response.AddHeader("Content-disposition", "attachment;filename=data.csv") context.Response.AddHeader("Cache-Control", "must-revalidate") context.Response.AddHeader("Pragma", "must-revalidate") context.Response.Write(data) context.Response.Flush() context.Response.End() My issue is when excel trys to open the exported file the character  appears before all £ signs, eg £232.00 when the value should be £232.00

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