website compile error

Question

I am experiencing the following error while loading a website:

Server Error in '/DatingGridView' Application.
Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: 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.

Source Error:

Line 52:     
Line 53:      
Line 54:       
Line 55:      
Line 56:     


Source File: D:\VSProjects\DatingGridView\web.config    Line: 54

Assembly Load Trace: The following information can be helpful to determine why the assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' could not be loaded.

=== Pre-bind state information ===
LOG: User = PassionFruit-PC\PassionFruit!!!
LOG: DisplayName = System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
 (Fully-specified)
LOG: Appbase = file:///D:/VSProjects/DatingGridView/
LOG: Initial PrivatePath = D:\VSProjects\DatingGridView\bin
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: D:\VSProjects\DatingGridView\web.config
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\machine.config.
LOG: Post-policy reference: System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
LOG: Attempting download of new URL file:///C:/Users/PassionFruit!!!/AppData/Local/Temp/Temporary ASP.NET Files/datinggridview/5a514f00/39d65547/System.Web.Extensions.DLL.
LOG: Attempting download of new URL file:///C:/Users/PassionFruit!!!/AppData/Local/Temp/Temporary ASP.NET Files/datinggridview/5a514f00/39d65547/System.Web.Extensions/System.Web.Extensions.DLL.
LOG: Attempting download of new URL file:///D:/VSProjects/DatingGridView/bin/System.Web.Extensions.DLL.
LOG: Attempting download of new URL file:///D:/VSProjects/DatingGridView/bin/System.Web.Extensions/System.Web.Extensions.DLL.
LOG: Attempting download of new URL file:///C:/Users/PassionFruit!!!/AppData/Local/Temp/Temporary ASP.NET Files/datinggridview/5a514f00/39d65547/System.Web.Extensions.EXE.
LOG: Attempting download of new URL file:///C:/Users/PassionFruit!!!/AppData/Local/Temp/Temporary ASP.NET Files/datinggridview/5a514f00/39d65547/System.Web.Extensions/System.Web.Extensions.EXE.
LOG: Attempting download of new URL file:///D:/VSProjects/DatingGridView/bin/System.Web.Extensions.EXE.
LOG: Attempting download of new URL file:///D:/VSProjects/DatingGridView/bin/System.Web.Extensions/System.Web.Extensions.EXE.


Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433 

Answer 1

Your error clearly states:

Could not load file or assembly 'System.Web.Extensions'

Check that you are referencing this in your project and that your .NET framework is installed correctly.

Answer 2

There is a good discussion and solutions here:

http://forums.asp.net/t/1062125.aspx

Answer 3

System.Web.Extensions is required for MS Ajax and will appear in your D:\VSProjects\DatingGridView\web.config to enable the correct handlers for ASP.Net 2.0 (comes built in for 3.5). If you haven't installed the MS Ajax Extensions on the machine where you are running this site you'll have the kind of error you've posted.