private void dataTable_RowChanged(Object dt, DataRowChangeEventArgs e)
        {
            try
            {
                // RowChanged wird Zellenweise aufgerufen
                if (((DataTable)dt).Rows.Count == 1) return;
 
                if (e.Row.Table.Rows.Count % ((int)(RowsCounttoLoad / 100) + 1) _
                  == 0)
                    this.OnFillIsRunning((DataTable)dt);
            }
            catch (System.Exception ex)
            {
                MessageBox.Show(ex.ToString(), "dataTable_RowChanged");
            }
        }