Embedded ListView question

[Jim]

I'm working a project where there is a ListView embedded within another ListView. 
I'm having difficulty performing a databind on the embedded ListView when the user deletes an entry from it.  I receive "Object reference not set to an instance of an object" as an error.  The entry does get deleted but I'm unable to refresh the ListView to reflect the deleted entry.  Thanks very much for any assistance!

Code:

 

 

Protected Sub lvMissionSubTasks_ItemDeleting(sender As Object, e As Telerik.Web.UI.RadListViewCommandEventArgs) Handles lvMissionSubTasks.ItemDeleting

 

 

 

If TypeOf e.ListViewItem Is RadListViewItem Then

 

 

 

Dim lbl As Label = TryCast(e.ListViewItem.FindControl("lblItemID"), Label)

 

 

 

Dim de As New LaunchChecklist.BUS.Items

 

de.Delete(

 

CInt(lbl.Text))

 

 

 

'lvMissionSubTasks.DataBind()

 

 

 

Dim lv As RadListView = DirectCast(e.ListViewItem.FindControl("lvMissionLevel3SubTasks"), RadListView)

 

lv.DataBind()

 

 

End If

 

 

 

End Sub

 

[Jim]

Any suggestions?

[Antonio Stoilkov]

Hello Jim,

The thrown exception occurs because one of defined variables value is null. The two possibilities are the lbl Label control or the lv RadListView control. In order to resolve your issue you could set up a breakpoint and see where the exception is thrown and from which of the two controls. The next step is to further investigate how to access the control so the FindControl method finds it successfully.

Kind regards,
Antonio Stoilkov
the Telerik team