Vb.net error object variable or with block variable not set

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I have to reorder a Telerik grid but is giving me the error in row1 = rdgComponentes.DataSource.[Select]([String].Format("Sequencia = '{0}'", key1.ToString()))(0)

Here is the code:

Dim upbtn As ImageButton = DirectCast(sender, ImageButton)
Dim item As GridDataItem = DirectCast(upbtn.NamingContainer, GridDataItem)
Dim index As Integer = item.ItemIndex
If index = 0 Then
    Return
End If
Dim movedItem As GridItem = TryCast(TryCast(rdgComponentes.MasterTableView.Controls(0), Table).Rows(index), GridItem)
Dim beforeItem As GridItem = TryCast(TryCast(rdgComponentes.MasterTableView.Controls(0), Table).Rows(index - 1), GridItem)
Dim key1 As Object = rdgComponentes.MasterTableView.DataKeyValues(index)("Sequencia")
Dim row1 As DataRow
row1 = rdgComponentes.DataSource.[Select]([String].Format("Sequencia = '{0}'", key1.ToString()))(0)
MoveDataRowUp(row1)
rdgComponentes.Rebind()

What I have tried:

i think that the problem is nne of the objects on that line is Nothing.

Posted 23-Aug-16 7:03am

Member 12699640

Updated 26-Aug-16 5:56am

NewPast

v2

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Patrice T · Answer 1 · 2016-08-23T07:20:00

You should learn to use the debugger as soon as possible. Rather than guessing what your code is doing, It is time to see your code executing and ensuring that it does what you expect.

The debugger allow you to follow the execution line by line, inspect variables and you will see that there is a point where it stop doing what you expect.
Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]

The debugger is here to show you what your code is doing and your task is to compare with what it should do.
When the code don't do what is expected, you are close to a bug.