Failed to load viewstate

Last post 07-07-2009 7:40 AM by reven_gr. 1 replies.

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Failed to load viewstate

07-07-2009, 7:09 AM

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reven_gr
Member since 06-22-2009, 1:24 AM
Posts 173

hi there,

i have a page with a gridview and 2 detailsview. the detailsviews show the details of the gridview selected record.

in order to update them simultaneously i have also write a code that when i press the edit button of the first detailsview

insert the second one into edit mode.

in that edit mode i have made local controls in order to read the values of the second detailsview.

    Private Sub DetailsView1_ModeChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DetailsViewModeEventArgs) Handles DetailsView1.ModeChanging
        If e.NewMode.Equals(DetailsViewMode.Edit) Then
            Me.DetailsView2.ChangeMode(DetailsViewMode.Edit)

        ElseIf e.NewMode.Equals(DetailsViewMode.ReadOnly) Then
            Me.DetailsView2.ChangeMode(DetailsViewMode.ReadOnly)
        End If
End Sub

    Private Sub DetailsView1_ItemUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DetailsViewUpdateEventArgs) Handles DetailsView1.ItemUpdating
        Dim id As String = Me.DetailsView2.SelectedValue
        Dim data1 As DropDownList = Me.DetailsView2.FindControl("DropDownList1")
        Dim data2 As DropDownList = Me.DetailsView2.FindControl("DropDownList2")        
        SqlDataSource3.UpdateCommand = "..."
        SqlDataSource3.Update()
        SqlDataSource3.DataBind()
        Me.DetailsView2.DataBind()
End Sub

i get the following error:

Server Error in '/' Application.

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(Object savedState) +310
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +136
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +224
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +136
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +224
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +136
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +224
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +136
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +224
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +136
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +224
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +136
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +224
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +136
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +224
   System.Web.UI.Page.LoadAllState() +439
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1092

what's wrong the cobe in vb, or the code in asp?

any ideas ?

thanks.