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• Cannot find System.Web.Script.Service namespace error after upgrading to Visual studio 2010

  - by Gavin

  I've just upgraded a VS 2008 project to VS 2010, converting the project but keeping the target as .NET 3.5 (SP1 is installed). My project worked without issue under VS 2008 on another machine. I've added references to System.Web.Extensions.dll but I'm still getting the following errors from code in the App_Code folder: 1) Cannot find System.Web.Script.Service namespace 2) Type 'System.Web.Script.Services.ScriptService' is not defined. 3) Type 'System.Runtime.Serialization.Json.DataContractJsonSerializer' is not defined. Anyone have any ideas what the problem might be as I'm pretty stumped? :(

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• Using DropDownList in EditTemplates of a GridView

  - by vaibhav

  I am working on a GridView in Asp.Net. When initially a the Page Loads, my gridview look like: When a user clicks, to edit a row, I am using edit templates to show 'Domain' in a DropDownList. But problem is , when the DropDownlist gets load with data, it lost the current value of the 'Domain'. i.e If I want to edit 4th Row, its domain which is currently set to 'Computers' is getting changed to 'MBA' which is ofcourse the first element return by the DataSource. I want to display the current value ('computers') as the selected value in DropDownList. But I am unable to get the value of Domain, which is being edited.

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• custom events in child userControls c# .net or Child to Parent Communication in UserControls

  - by Asad Malik

  Okay here is the scenario: I have a parent "SalesUC" UserControl which contains a "itemDetailsUC" UserControl, as well as a status label. (plz see sample below) What I want: If there occurs any exception in itemDetailsUC, it should be able to communicate the exception text to parent control (i.e. SalesUC). Remember: the "ItemDetailsUC" is also used in other controls that may or may not have status label. any suggestions, answers... please. Framework: .net 3.0/3.5 Language: c# Domain: Windows Application, WinForms, etc. Sample ScreenShot regards.

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• How can I resolve exception: Error executing child request for ChartImg.axd

  - by macleojw

  I'm using the Chart Controls for Mircosoft .NET Framerwork. Most of the time they work perfectly. However, if I leave a page for longer than 20-30 mins and then try to refresh the page, I get an error saying: Error executing child request for ChartImg.axd. Exception Details: System.Web.HttpException: Error executing child request for ChartImg.axd. If I update the page using an AJAX update panel I get the following error: Sys.WebForms.PageRequestManagerServerErrorException: Error executing child request for ChartImg.axd It seems that the chart handler stops after a period of inactivity. Most of the webpages I've looked at for this error are for situations when this error is displayed all the time. In my case it is only displayed after a period of inactivity. Can someone provide a better explanation of what is happening and suggest a solution?

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• .Net opening and clossing database connections

  - by Dan

  I currently designed the data access portion of our framework so that every time a business object needed to interact with the database it would have to open a connection, invoke the data access layer (to execute the query), and then close the connection. Then if it needed to run in a transaction it would open the connection, begin the transaction, invoke the data access layer (to execute the query) and then commit the transaction, close the transaction, and finally close the connection. I did it this way with the mindset of open late and close early...but what if I needed to call other BO's to submit data in a single transaction? Is there a better way to handle opening and closing connections as well as working with transactions? I'm a rookie at architecting applications so I hope I'm not doing this wrong...any help is appreciated.

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• What exactly is the "Multi-threaded Debug DLL" Runtime Library option doing in VS 2008?

  - by GregH

  I have a solution in VS 2008 that creates a DLL. I then use that DLL in another application. If I go in to the DLL projects property pages and change the following configuration for a DEBUG build then the built dll no long provides the desired functionality. If I change it back and rebuild the DLL, then the DLL does provide the correct functionality: Property Pages = Configuration Properties = C/C++ = Code Generation = Runtime Library If set to "Multi-threaded Debug DLL (/MDd)" then everything works as it should. I get the correct functionality from the DLL If set to "Multi-threaded DLL (/MD)" then the DLL does not function properly...no runtime errors or anything, it just doesn't work (The DLL is supposed to plot some lines on a map but does not in this mode). So the question is, why does using the /MDd flag result in correction functionality of the underlying code, while /MD results in incorrect functionality? A little background...somebody else developed the DLL in C++ and I am using this DLL in a VB.net application.

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• How to update model?

  - by Alexander Efimov

  Hi, guys. I have an ASP.NET MVC page where the model is being edited. On each action executing I have a new controller, so I don't get an updated model. I'm saving a model instance into Session["MyModelKey"]. But every time an action is executed, I have unmodified instance there even if I have changed values in textboxes which were created like this: @Html.LabelFor(model = model.EMail) @Html.TextBoxFor(model = model.EMail) @Html.LabelFor(model = model.Country) @Html.TextBoxFor(model = model.Country) @Html.ActionLink("MyAction", "MyController") Controller: public class MyController : Controller { public ActionResult MyAction() { //Every time this action is executed - I have a new controller instance //So I have null in View.Model //I get Session["MyModelKey"] here, //But the model instance properties are not updated //even though I have updated E-mail and Country properties of the model in the UI } } So, how can I get an updated model? Thanks in advance.

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• Check ReturnUrl is valid before redirecting

  - by Josh

  I'm using ASP.NET Membership and Form Authentication and before redirecting to the returnURL I wanted to validate it. For those unfamiliar with the workflow, basically if you request a page that requires that you are authenticated, you are redirected to a login page. In the URL string you'll see a parameter called returnURL, e.g. http://example.com/login.aspx?ReturnUrl=%2fprotected%2fdefault.aspx Whether you use this in a redirect such as Response.Redirect(returnURL) or indirectly through the FormsAuthentication.RedirectFromLoginPage method, it passes without validating returnURL. FormsAuthentication.RedirectFromLoginPage does have a security check that it is isn't leaving the domain, but that still doesn't stop someone from putting enough random characters to cause an error. I tried using System.IO.File.Exists(Server.MapPath(returnURL)) but given enough illegal characters it cause Server.MapPath to error. Note: URLEncoding doesn't work because we are not cleaning a parameter, but the primary URL. Any other suggestions for validating or cleaning the returnURL value?

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• how i can get AspNetAccessProvider?

  - by loviji

  Hello, in my asp.net web application i used ASPNetSQLProvider for membership. Now i need use ASPNETAccessProvider. I wrote in webconfig file: <membership defaultProvider="AccessMembershipProvider" > <providers> <clear /> <add name="AccessMembershipProvider" type="System.Web.Security.AccessMembershipProvider" connectionStringName="AccessConnection" /> </providers> </membership> and trying to create user, and code fails : Could not load type 'System.Web.Security.AccessMembershipProvider'. How can i fix this?

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• String Manipultation - Get String between two other Strings?

  - by Ben

  I have a large piece of text in which there is something simular to this: !#_KT_#!COMMANDHERE!#_KT_#! I want, in VB.Net, to get the 'COMMANDHERE' part of the string, how would I go about doing this? I have this so far: Dim temp As String = WebBrowser1.Document.Body.ToString Dim startIndex As Integer = temp.IndexOf("!#__KT__#!") + 1 Dim endIndex As Integer = temp.IndexOf("!#__KT__#!", startIndex) Dim extraction As String = temp.Substring(startIndex, endIndex - startIndex).Trim TextBox1.Text = extraction However this only removes the LAST string eg: #_KT_#! COMMAND. Any help is appreciated!

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• serverside controls vs html controls from AJAX point of view

  - by devmania

  hi, i know this question have been mentioned alot here but mine is a little more updated, now with ASP.net 4 and new Ajax client templating plus JASON services. so if i got all these new capabilities will i really need server side controls as long as i can bind on client side, create data-views on client side heck i can even use data-context and apply CRUD operations on clients side. so i actually i wont need button_click server side event or what so ever... i am asking this because i own some commercial Controls like Telerik and Component art and they both offer client side operations ow but still i am confused as to my knowledge creating these controls will still have to go through Page Life cycle please advise me.

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• PerformanceCounters on .NET 4.0 & Windows 7

  - by scott

  I have a program that works fine on VS2008 and Vista, but I'm trying it on Windows 7 and VS2010 / .NET Framework 4.0 and it's not working. Ultimately the problem is that System.Diagnostics.PerformanceCounterCategory.GetCategories() (and other PerformanceCounterCategory methods) is not working. I'm getting a System.InvalidOperationException with the message "Cannot load Counter Name data because an invalid index '' was read from the registry." I can reproduce this with the very simple program shown below: class Program { static void Main(string[] args) { foreach (var pc in System.Diagnostics.PerformanceCounterCategory.GetCategories()) { Console.WriteLine(pc.CategoryName); } } } I did make sure I'm running the program as an admin. It doesn't matter if I run it with VS/Debugger attached or not. I don't have another machine with Windows 7 or VS2010 to test it on, so I'm not sure which is complicating things here (or both?). It is Windows 7 x64 and I've tried forcing the app to run in both x32 and x64 but get the same results.

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• Will Visual Studio 2010 only run 4.0 unit tests?

  - by Bjorn Bailleul

  I have different projects written in .NET 3.5 and some unit test projects to cover them. When converting my solution to be used in Visual Studio 2010 I keep all my projects in 3.5 but the unit tests are forced to 4.0? This way I cannot use them with my regular projects anymore. Resulting in this: Could not load file or assembly 'xxx.xxx.Core.UnitTest' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded. So I can't unit test any project less then 4.0? Or am I doing something wrong here?

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• Commands to compile programs using .NET

  - by Arjun Vasudevan

  In case I have .NET framework installed in my computer + all the necessary other language support (Perl Interpreter, etc) What are the commands I should give in the console to compile programs in the following languages: 1. C 2. C++ 3. Java 4. Python 5. VB 6. C# 7. Perl 8. Ruby Like we have for VB- *vbc program_name.vb*, what are the commands to compile programs in other languages?

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• Killing a deadlocked Task in .NET 4 TPL

  - by Dan Bryant

  I'd like to start using the Task Parallel Library, as this is the recommended framework going forward for performing asynchronous operations. One thing I haven't been able to find is any means of forcible Abort, such as what Thread.Abort provides. My particular concern is that I schedule tasks running code that I don't wish to completely trust. In particular, I can't be sure this untrusted code won't deadlock and therefore I can't be certain if a Task I schedule using this code will ever complete. I want to stay away from true AppDomain isolation (due to the overhead and complexity of marshaling), but I also don't want to leave a Task thread hanging around, deadlocked. Is there a way to do this in TPL?

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• How Do You Insert Large Blobs Into Oracle 10G Using System.Data.OracleClient?

  - by discwiz

  Trying to insert 315K Gif files into an Oracle 10g database. Everytime I get this error "ora-01460: unimplemented or unreasonable conversion requested" whe I run the stored procedure. It appears that there is a 32K limit if I use a stored procedure. I read online that this does not apply if you are doing a direct insert, but I do not know how to create the insert string for a Byte Array. This is a thick client running on the server so not worried about SQL Injection attacks. Any help would be greatly appreciated. FYI, code in vb.net. Thanks, Dave

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• Efficiency Question for an Ajax App

  - by Kubi

  Hi, Currently I am dealing with a web application which uses a txt file as a database for testing for now. But we will connect it to a server later on. My question is, if there is a more efficient way to get my objects than the way I am using now. During the page_init I am getting all my objects into a Collection as List, then I am populating the ajax toolkit accordion objects in the page with that. I have some client side buttons which fires callbacks for getting some other objects to populate the accordions in an update panel. And I am using .net Collections too much like dictionary and list, I am wondering if using arrays is more efficient. Could you advise me about how to make this site better and faster ? Is it better or possible to initialize those TravelP objects in javascript at the beginning and use it like that ? Any comments would be greatly appreciated, Thanks

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• Returning to last viewed List page after insert/edit with ASP.NET Dynamic Data

  - by Pat James

  With a pretty standard Dynamic Data site, when the user edits or inserts a new item and saves, the page does a Response.Redirect(table.ListActionPath), which takes the user back to page 1 of the table. If they were editing an item on page 10 (or whatever) and want to edit the next item on that page, they have to remember the page number and navigate back to it. What's the best way to return the user to the list page they last viewed? I can conceive of some solutions using cookies, session state, or query string values to retain this state and making my own Page Template to incorporate it, but I can't help thinking this must be something that was considered when Dynamic Data was created, and there must be something simpler or built-in to the framework that I'm missing here.

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• Which Java MVC Framework best aligns with the Web Application Security Framework Manifesto?

  - by jm04469

  Has anyone in the stackoverflow community ever studied the security characteristics of various J2EE frameworks? I would love to understand what framework best aligns with the Web Application Security Framework Manifesto http://labs.securitycompass.com/papers/secure-web-application-framework-manifesto-v0-08.pdf

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• Using LLBL as Model in MVC

  - by Quentin J S

  I have settled on trying to use ASP.NET MVC but the first part I want to replace is the Model. I am using LLBL Pro for the model. I have a table called "Groups" that is a simple look up table. I want to take thhe results of the table and populate a list in MVC. Something that should be very simple... or so I thought.... I've tried all kinds of things as I was getting errors like: The model item passed into the dictionary is of type 'System.Collections.Generic.List1[glossary.EntityClasses.GroupEntity]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable1[glossary.CollectionClasses.GroupCollection]'. private GroupCollection gc = new GroupCollection(); public ActionResult Index() { gc.GetMulti(null); return View( gc.?????? ); } This is all I am trying to do, I've tried lots of variations, but my goal is simply to take the data and display it.

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• PHP CMS with independent framework.

  - by Simon

  We currently use MySource Matrix CMS for large projects, Wordpress CMS for small projects and Zend Framework for bespoke applications... I'm not trying to confuse and compare a CMS to a framework, that has been done before :-) I want to identify a few CMSs for review that have foundations in strong (preferably independent) PHP frameworks. The only one I have looked at is SilverStripe CMS and Sapphire Framework. We have many clients that have a CMS for internet and/ or extranet and then various other bespoke applications that are then integrated via various means to look like they're in the CMS. I believe it will be more productive and beneficial to have a common framework between these branches so they can be natively merged. Hope this makes sense. PS. I have used custom assets in MySource Matrix and specific modules in other CMS but you feel you are working for the CMS not the application you are building.

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• How do I control when a contextMenuStrip is displayed?

  - by GregH

  In vb.net (2008), I want to be able to control when a contextMenuStrip (context menu) is displayed. I don't want it to always appear when the right mouse button is clicked...only when certain criteria within my program are met. I figure I would use addHandler but I'm not exactly clear on how to completely control the opening of the contextMenuStrip. I know I would issue a call to the "open" method to render the contextMenuStrip. However, I am unclear as to how to completely take over control of when to render the contextMenuStrip.

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• Translating delegate usage from C# to VB

  - by Homeliss

  ContactManager.PostSolve += PostSolve; I am having a problem converting this piece of code from C# to VB.NET. ContactManager.PostSolve is a delegate. I tried the following but it doesn't work, it says PostSolve is not an event of ContactManager: AddHandler ContactManager.PostSolve, AddressOf PostSolve The following works, but this only allows me to have one handler for the delegate: ContactManager.PostSolve = new PostSolveDelegate(AddressOf PostSolve) Is there a way for me to do the same thing in VB that was done in the first piece of code? Thanks!

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• System.Threading.Tasks - Limit the number of concurrent Tasks

  - by James

  I have just started to look at the new "System.Threading.Tasks" goodness in .Net 4.0, and would like to know if there is any build in support for limiting the number of concurrent tasks that run at once, or if this should be manually handled. E.G: If I need to call a calculation method 100 times, is there a way to set up 100 Tasks, but have only 5 execute simultaneously? The answer may just be to create 5 tasks, call Task.WaitAny, and create a new Task as each previous one finishes. I just want to make sure I am not missing a trick if there is a better way to do this. Thanks for any help.

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• RenderAction not finding action method in current controller in current area

  - by Andrew Davey

  I'm creating an ASP.NET MVC 2 (RTM) project that uses areas. The Index action of the Home controller of one area needs to use RenderAction to generate a sub-section of the page. The action called is also defined in the same Home controller. So the call should just be: <% Html.RenderAction("List") %> However, I get an exception: A public action method 'List' was not found on controller 'RareBridge.Web.Areas.Events.Controllers.HomeController'. Note that I'm not in the "Events" area! I'm in a completely different area. If I remove the "Events" home controller, then the exception still occurs but names a different controller (still not the one I want it to call). I've also tried providing the controller name and area to the RenderAction method, but the same exception occurs. What is going on here? BTW: I am using Autofac as my IoC container

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