Changing controls dynamically causes viewstate error on postback

[Billkamm]

I have a search page where if the results are found it returns a datagrid with the results. If no resutls are found it returns a literal control that outputs text saying "no results found".

The problem is when I do a search and get a datagrid then do another search and get no results I get an error on the second search because it says the viewstate does not have the same structure.

How can I fix this? (Error information below)


Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

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.Web.HttpException: Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

 

[adamroof]

In your web.config

 <system.web>
    [b]<pages enableViewStateMac="false" />[/b]
    <customErrors mode=....

 

[Billkamm]

That solution does not fix my problem. I am getting the same error at the same point.

 

[adamroof]

i had EXACT SAME ISSUE on searching grid, no results and BAM, error with viewstate.

Maybe i did something else, but im pretty sure that was culprit...did you recompile, clear temp files, bla bla...

If not is postback handling?

http://www.dotnet247.com/247reference/msgs/49/246110.aspx

http://www.hanselman.com/blog/CommentView,guid,d5c54860-87d5-44d6-83ed-c82f08a9a5f5.aspx

 

[Billkamm]

Is there some sort of way to cause my dynamically controls (datagrid) to not be added to the viewstate?

 

[0ddball]

If you are doing your work on an event after Load possibly.

Other than that I'm too tired to work out what you're tyring to say - please post the code


Yet another unchecked rambling brought to you by:
Oddball