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Error Creating Control In Aspx Page

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Create Aspx Page In Visual Studio 2012

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official information source from the .NET Web Development and Tools group at Microsoft. Controls State: "Error Creating Control" in the Design View in Visual Studio 2010 ★★★★★★★★★★★★★★★ April 15, 2010 by Web Development Tools Microsoft // 33 create aspx page in notepad Comments 0 0 0 In VS 2010, if you are accessing the Session state in the OnInit(…) method of your page, similar to the following code snippet:

then you will encounter an “Error Creating Control” for ASP.NET controls when viewing the Design view of the page. For example, if you have an ASP.NET button control on the page, the designer will display the error: “Error Creating Control – Button1 Session state can create aspx page in mvc project only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System. Web.SessionStateModule or a custom session state module is included in the \\ section in the application configuration.”. Screen shot of the error: We are seeing this error because at the design time, some objects such as Session, are not available, or being null. However, the project still runs perfectly at runtime. To workaround the issue, you can add code to check for the existence of the Session object as shown below, then the design view will render correctly. We are considering adding a fix for this issue during the VS 2010 SP1 timeframe. UPDATE: There are some confusion from the readers about the post, so I’m updating the blog to clarify the issue and the workarounds. 1. Steps to reproduce the issue for a website Add a file Class1.cs under App_Code directory. Replace the content of the file with the following code: namespace ClassLibrary1 { public class MyCustomPage : System.Web.UI.Page { protected override void OnInit(EventArgs e) { base.OnInit(e); int count = Session.Count; } } } In a webform with no code behind, replace the Page directive with the following line: <%@ Page Language

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for Android UI for Windows Universal UI for Windows Phone PRODUCTIVITY & QUALITY JustCode JustMock Testing Framework Debugging Fiddler JustDecompile JustTrace Reporting & Data Access Reporting Report Server Data Access DEPLOYMENT Modulus https://blogs.msdn.microsoft.com/webdev/2010/04/15/controls-state-error-creating-control-in-the-design-view-in-visual-studio-2010/ Mobile App Development Telerik Platform AppBuilder Analytics Backend Services Testing Test Studio Mobile Testing API Testing Digital Content & Experience Progress Sitefinity CMS Progress Sitefinity Digital Experience Cloud ENTERPRISE FREE TRIALS PRICING SUPPORT & LEARNING ABOUT US YOUR ACCOUNT Search Your Account Telerik Platform Telerik Forums / UI for ASP.NET AJAX Forum / General Discussions / Error Creating Control solution found! Cancel http://www.telerik.com/forums/error-creating-control-solution-found The title field is required! UI for ASP.NET AJAX Resources Buy Try Feed for this thread 5 posts, 0 answers King Wilder 240 posts Member since: Oct 2007 Posted 17 Jan 2012 Link to this post I just found this nasty error this morning, for what seemed like no reason. And I found a solution that worked for me, but it might not be readily available to fix for everyone, I'll explain. I've attached two screenshots, a before and after that displays my Visual Studio 2010 Design Views with the errors and the fixed result. The part that helped me figure it out was with the RadScheduler. It displayed a much more helpful message that helped me find the solution. If you notice in the "error" screen shot the RadTreeView and RadMenu controls do not display anything but the error message. But when I dragged a RadScheduler on the page, it displayed amuch more helpful message. Since I had just upgraded my ASP.NET AJAX controls to the latest version yesterday, the local cached version was still the prior version. This is what caused the errors. So here's what I did: Cl

by: ASPOSE - the market leader of .NET and Java APIs for file formats – natively work with DOCX, XLSX, PPT, PDF, images and more Rick Strahl @RickStrahl Posts - 1079 https://weblog.west-wind.com/posts/2009/Feb/16/Error-Creating-Control-Errors-in-the-ASPNET-Designer Comments - 13806 RSS Feed Rick's Sites Rick's GitHub Projects Rick's FoxPro Web Log West Wind Message Board CodePaste.net GeoCrumbs.net Rick's Products Markdown Monster WebSurge Html Help Builder Web Monitor Find this content useful? Consider making a small donation to show your support. Tweets by @RickStrahl Error Creating Control Errors in the ASP.NET Designer February 16, 2009 - from Maui, Hawaii 18 comments Tweet I’ve been getting a lot of Error Creating aspx page Control in the designer recently. Well, probably recently only because I’ve been using the designer a bit over the last couple of days to build some data entry heavy pages that use my DataBinder control, which is a lot easier to set up using the designer than in markup since it’s an extender control. But more than a few times in the last few days Visual Studio had decided to mangle my create aspx page control with an error like this: It looks like somehow Visual Studio is failing to properly sync the files in the BIN directory (which are not actually used in the designer) and the temporary copy of the assemblies that simulates the ASP.NET temporary assembly directory. How these files can get out of sync or how they even can be differentiated is something I don’t understand. I’ve been trying to pinpoint what causes the problem and it seems (although I can’t duplicate it 100%) that when the underlying control assembly changes these errors start popping up in the designer. In this particular project I am using controls in my own Web Control project and since I’m working on the library at the moment this control assembly gets recompiled occasionally. Every time a change is made it seems like Visual Studio screws this up. The resolution? Restart Visual Studio which cleans out the temporary assembly folder. When I come back in and re-open the page everything is as it should be. It seems this behavior is something new though – I’ve done heavy control development and never really noticed issues with this until Visual Studio 2008 released possibly even as late as SP1. In the past I’ve always been able to use the designer’s Refresh op

 

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