Question

I keep getting this error

Object reference not set to an instance of an object. 

What i want to do is when the button is clicked my panel is visible with a textbox of the id number, of the row that they clicked. by id number i mean the column id, and the number given to it by the database.

Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs)
    Dim button As Button = CType(e.Row.FindControl("button1"), Button)
    Dim id As Label = CType(e.Row.FindControl("id"), Label)

    button.OnClientClick = _
    Panel1.Visible = True
    Label2.Visible = True
    Label2.Text = id.Text

    UpdatePanel1.Update()



End Sub

Answer 1

Try to add the following condition to ensure whether the DataRow (rather than the HeaderRow) is being processes at this moment:

If e.Row.RowType = DataControlRowType.DataRow Then
    ...
End If