Visual Studio :: 2010 All AJAX Extensions Error "is Not A Known Element"?
Jun 25, 2010
I have vs2005 Pro, vs2008 Pro and vs2010 Pro installed on a Vista machine. Recently I upgraded a non-AJAX web site from vs2008 to vs2010. The web site works fine but now I'd like to use the UpdatePanel. However after I insert the ScriptManager I receive
the following error:
"Element 'ScriptManager' is not a known element. This can occur if there is a compilation error in the Web site, or the web.config file is missing."
All the posts I have read seem that I should not see this error in vs2010. I have even added the following to the web.config with no success:
[Code]....
As a side note, I am able to use the latest AJAX Control Toolkit for .NET 4.
Why can I not add ScriptManager control or UpdatePanel to a page in Visual Studio 2010?The drag( or double click) just fails - it seems like there is an incompatibility somewhere?UPDATE:This is 'default' install of 2010 Ultimate on Windows7, create a web application, cannot drag ScriptManager or UpdatePanel to the designer. Typing the declarations works.The cursor changes to the [+] icon when you drag it to the right place but nothing appears to happens on 'drop', briefly the documents name has * appended, this quickly changes back to normal, either is saves or does an undo.I'm assuming something is going wrong so it undos...but what is going wrong?
I'm getting ' Could not load file or assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.' when dragging AJAX Extention to any page.I've been uninstalling and reinstalling VS2005 whole day. Meanwhile there are no AJAX Control Toolkit in Toolbox and AJAX enabled templetes are missing.
Platform : Visual studio 2010 and mvc 2 In mvc application I used update panel, I am getting following error Sys.WebForms.PageRequestManagerParserErrorException I have tried all of these1. EnableSessionState="false" ValidateRequest="false" EnableEventValidation="false" 2. EnableSessionState="false" ValidateRequest="false" EnableEventValidation="false" but error is occured again but when try this 3. asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="false"/>When I take enablepartialrendering="false" it does refersh page.
Visual Studio 2010 Beta 2 locked up, and when I tried to restart it, it wouldn't load, so I did a devenv.exe /resetuserdata to get it going again. It reset everyhing in my options of the web app/ etc, and now some AJAX conrols don't work such as dragpanel. I assume that it is because something got reset that I haven't enabled again, but can't figure it out.
when i opened my Visual Studio 2010 i noticed that my ajax tab was missing from my toolbox and ajax control kit too.Then i noticed even that when i create new website, there is no web.config in it and it should be.WHAT IS GOIN ON???? :/
I tried to install Visual Studio Prof 2010 trail version in my system, but i got an error saying 'Please remove/uninstall Visual Studio 2010 load test controller' to proceed installation. i uninstalled my previous VS2008 software from system and i could not find anything like 'Remove/Uninstall Visual Studio 2010 load test controller' software in my Add/Remove Programs.
i installed Visual Studio 2010 Trial on Microsoft Site (install successfull)My Computer OS: Windows Server 2008 SP2I create WebApplication Project --> Default.aspx --> Design --> Toolbox --> Oh what ???? The Control ScriptManager is fail and UpdatePanel, ListView... too. :-S
On a webform that was working fine before, all of the sudden most of the controls on the page give me the following error in trying to use the controls in codebehind. Error 18 'DropDownList1' is not declared. It may be inaccessible due to its protection level. C:UsersJohnDocumentsVisual Studio 2010Projects2010App_PagesTestPage1.aspx.vb 29 107 2010
Element 'content' is not a known element. this can occur if there is a compilation error in the website, or the web.config file is missing.
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> <asp:Content --- showed a green wavy line , and on hover displayed the above error.
Now I am having certain problems.
1. Visual Studio 2010 hangs when I try to use ToolBox.
2. Intellisense for asp.net controls is not working.
I have tried replacing web.config file (frm backup) , tried to debug - it doesnt show anything.
All other websites are working alright. Have problem with only one of the websites.
I have an asp.net mvc 1.0 project. I upgraded the project and solution to Visual Studio 2010. However, I do not want to use asp.net mvc 2.0. My app compiles under mvc 1.0. All my references are to 1.0. I have copy local true and i am referencing mvc 1.0 from a lib folder, not the GAC.However I keep getting this error:
No parameterless constructor defined for this object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.MissingMethodException: No parameterless constructor defined for this object.
Source Error:An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:[MissingMethodException: No parameterless constructor defined for this object.] System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck) +0 [code]....
Its like it wants to keep using asp.net mvc 2.0, because its complaining about that GetControllerInstance method. This project works fine in vs 2008.
i used a jQuery plugin who try to call three or four method because some of them not implemented in some browser. code is working fine for me and it's work in all browser.when i try to debug the application in visual studio and internet explorer then i found the same errror everytime Microsoft JScript runtime error: Object doesn't support this property or method i see the same error every time. are it is not really so weird that they give me error every time even i put refresh and see error first then see the page in IE. i am trying to disable the script debugging for other and IE in IE but after that they never forget to give me error.well i am not want to go in the depth of this but someone tell if i can stop showing this window in my visual studio 2010.
I am getting this error, and cant figure out what the issue is.
Server Error in '/' Application.
Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.
Parser Error Message: 'JobManager.Contact' is not allowed here because it does not extend class 'System.Web.UI.Page'.
Source Error: Line 1: <%@ Page Title="Contact" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" Line 2: CodeBehind="Contact.aspx.cs" Inherits="JobManager.Contact" %> Line 3:
Source File: /Contact.aspx Line: 1 Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1
The code behind syntax is: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace JobManager { public partial class Contact : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } }
Have just loaded VWD 2010 and tried to create an SQL DB, the following error occurs "Failed to generate a user instance of SQL Server due to a failure in starting the process for the user interface. The connection will be closed."
Creating a .NET 3.5 website in 2010, and when I attempt to create public properties for a user control I whipped up it is giving me inline error:Visual Basic 9 does not support auto-implemented properties. I can, however, type GET on the next line 2010 populates the property just like it used to. However, when I expose a control property it craps out with a null reference error at runtime.
I upgraded from VS 2008 to VS 2010 and now the AJAX elements are not recognised by the source code editor, e.g. UpdatePanel, ScriptManager, etc. I get warnings in VS and no intellisense for those elements. When I run the site, all the AJAX controls work OK though.
I recently installed Windows 7 in my PC.I also insyalled Visual Studio 2005 in my system.
while creating web site throgh Visual Studio 2005 IDE , it is giving error that "The Web server does not appear to have the Front page server extensions Installed".
have here a (internal intranet) site where users can preserve places for the lunch and pause... :)Now, meanwhile the users count grows more and more and the ajax site that speeks with a webservice for the calculations und checks geting slower and slower... user 900+The site checks every 5 seconds for the actual state and uses groups for the users.Ok, now i have researched on the web, and found the comet/reverse ajax aproach that the service can push the clients with events.But i have not found any good asp.net tutorial with visual studio (2010) how i can use the asp.net standard controls and vs design mode.Is there a framework for that stuff?
