Viewstate - The state information is invalid

[Phil]

Hi All:

Like others, I am experiencing the following error in my orders selection grid. 

The state information is invalid for this page and might be corrupted.
   at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError)
   at System.Web.UI.ViewStateException.ThrowViewStateError(Exception inner, String persistedState)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()
   at System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
   at System.Web.UI.Page.LoadAllState()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
Inner Exception Trace:   Invalid viewstate.
    Client IP: 127.0.0.1
    Port:
    Referer: http://localhost:52506/WebUI/OrderSelection.aspx
    Path: /WebUI/OrderSelection.aspx
    User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; MS-RTC EA 2; MALC)
    ViewState: /wEPDwULL...

Inner Exception Trace:   Invalid length for a Base-64 char array.
   at System.Convert.FromBase64String(String s)
   at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)
   at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState)
   at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState)
   at System.Web.UI.HiddenFieldPageStatePersister.Load()

The grid allows filtering and contains 2 RadDatePickers.  If I change a value in the picker and press enter, I get the above error.  If I tab out of the field then no error.

I have tried EnableLinqExpressions="False", but no luck.

Phil

[Iana Tsolova]

Hello Phil,

Can you share the grid declaration and the code for binding the grid?
Any additional information on your scenario and setup might help us find the cause of the issue.

Best wishes,
Iana
the Telerik team

[Phil]

Hi:
This morning I made a reference example and have made some headway on the issue.  It is the weekend, so I will have to wait till Monday to see it solves the problem.
Phil

[Phil]

Hi:
I think placing the grid in a RadAjaxPanel solves the problem.  In my production application, I have things in the master page that I need, so a RadAjaxPanel will cause problems.
Phil