Failed to load ViewState.

[nithagowda]

Hello,

I have a DropDownList for source type and a panel for displaying TreeView based on the source type.. The problem is- if i select different source type drom ddlSrcType, other than the item which was selected in the previous run the following error message is displayed.. Please help me in this regard..

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.

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:

[HttpException (0x80004005): 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.]
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +483
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +195
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +424
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +195
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +424
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +195
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +424
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +195
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +424
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +195
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +424
System.Web.UI.Page.LoadAllState() +559
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2238


Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832

Nitha