After deleting a row, HasChange() dosen't trigger RRS feed

  • Question

  • This is Delete method :
        Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click 
            Dim currentID As Integer = 0 
            currentID = Me.BindingContext(myDataset, "Employees").Position 
            'mark as deleted 
        End Sub 

    and this is Undo method:

        Private Sub btnCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCancel.Click 
            If myDataset.HasChanges Then 
                btnReload_Click(sender, e) 
            End If 
        End Sub 
    But after deleting, HasChanges() doesn't trigger... Why ?

    Just one more question! , why I always have to refresh DataSet after all changes by using Fill() ?! Any better idea?!

    Monday, February 16, 2009 1:52 PM


  • Hi,

    In you Delete method you should call Delete for the row and not RemoveAt in order to enable HasChanges, Rows.RemoveAt completly removes the row from the table, Delete puts it on Delete State and will notify that there is a change in the DataSet/DataTable

    So it should look like this 


    Please let me know if this helps

    This posting is provided "AS IS" with no warranties, and confers no rights.
    • Marked as answer by Afshin_Zavar Wednesday, March 4, 2009 5:04 PM
    Tuesday, March 3, 2009 7:57 PM