Failed to load viewstate. The control tree into which...

[Rajneesh]

Hi,
I am facing issue when trying to edit or delete a row of rad grid-view. I have one RadPageView and inside this i am loading a User Control and in user control i have a RadGrid. Till now its working fine but it throws error when someone (By mistake) trying to edit a row and same time click edit for other row of next item after this if i click update/cancel or any other location it throws error as 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.

So i want only one edit option should be enable at once. if so then error will not come. For more information i have attached a screenshot. If you have still any doubt please let me know...

Thanks...

[Rajneesh]

Hi,
Still working and unable to find any solution. now i did as:

Protected Sub radGridEngMemberAccess_EditCommand(sender As Object, e As Telerik.Web.UI.GridCommandEventArgs) Handles radGridEngMemberAccess.EditCommand
       Dim _itemName As String = e.Item.UniqueID

       Dim nestedViewItems As GridItem() = radGridEngMemberAccess.MasterTableView.GetItems(GridItemType.NestedView)
       For Each nestedViewItem As GridNestedViewItem In nestedViewItems
           For Each nestedView As GridTableView In nestedViewItem.NestedTableViews
               For Each Data As GridDataItem In nestedView.Items
                   If String.Equals(Data.UniqueID, _itemName) Then
                       If Not String.Equals(Data.Edit, True) Then
                           Data.Edit = False
                       End If
                   Else
                       Data.Edit = False
                   End If

               Next
           Next
       Next
   End Sub

But when i click on edit button of next nested grid and looping then previous row state shows edit = false. so its still in edit mode and error remains same as 2 rows of different grid are in edit mode.

Waiting for reply.......

[Marin]

Hello Rajneesh,

You can try setting the AllowMultiRowEdit property of the RadGrid  to "false". This way only one row should remain in edit mode at a time.

All the best,
Marin
the Telerik team

[Rajneesh]

I tried but nothing change.
:(