public void Update(object sender, RoutedEventArgs e)
 {
     try
     {
         var columns     = (TableView.ItemsSource as DataView).Table.Columns.Cast <DataColumn>().Select(a => a.ToString()).ToList();
         var columnsData = (TableView.SelectedItem as DataRowView).Row.ItemArray.Select(a => a.ToString()).ToList();
         RowDataEntryField(columns);
         AddListBoxCombo.ForEach(a => a.Selected = columnsData[columns.IndexOf(a.TableFieldName)]);
         AddListBoxFields.ForEach(a => a.Input   = columnsData[columns.IndexOf(a.Text)]);
         InsertOrUpdate = true;
     }
     catch (Exception ex)
     {
         Notification(ex.Message);
     }
 }