devexpress中的gridControl添加自增列

 private void view_CustomDrawRowIndicator(object sender, DevExpress.XtraGrid.Views.Grid.RowIndicatorCustomDrawEventArgs e)
      {
          e.Appearance.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Far;
          if (e.Info.IsRowIndicator)
          {
              if (e.RowHandle >= 0)
              {
                  e.Info.DisplayText = e.RowHandle.ToString();
              }
              else if (e.RowHandle < 0 && e.RowHandle > -1000)
              {
                  e.Info.Appearance.BackColor = System.Drawing.Color.AntiqueWhite;
                  e.Info.DisplayText = "G" + e.RowHandle.ToString();
              }
          }
      }