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shanshan
110
ultraGrid selected Rows change efficiency
posted

Hi


I set contextmenuStrip for the ultraGrid.Click the button of the contextmenuStrip to
select the ultraGrid all rows.The currnet UltraGrid has the least 5000 data.
Then change the selected row in a column of data.
Such as:
   this.UltraGrid.ActiveRow = null;
            this.UltraGridSelected.Rows.Clear();
            for (int i = 0; i < this.UltraGrid.Rows.Count; i++)
            {
                this.UltraGrid.Rows[i].Selected = true;
            }
(Or use the foreach,Bind)

   if (this.UltraGrid.Selected.Rows.Count > 1)
                {
                   for (int i = 0; i < this.UltraGridSelected.Rows.Count; i++)
                   {
                     this.UltraGrid.Selected.Rows[i].Cells["Cloumn6"].Value = strProType;
                   }
                }


But this efficiency is very low,resulting in slow page.
There is better way to solve this problem?

  • 69832
    Offline posted

    Note that this only works in a single band grid, but this code uses the ISelectionManager interface to range select rows, which applies the selection in one atomic operation rather than one for each row:

    private void SelectAllRows( UltraGrid grid )
    {
        UltraGridRow first = grid.Rows.Count > 0 ? grid.Rows[0] : null;
        UltraGridRow last = grid.Rows.Count > 0 ? grid.Rows[grid.Rows.Count - 1] : null;

        if ( first != null && last != null )
        {
            ISelectionManager selectionManager = grid as ISelectionManager;
            selectionManager.SetPivotItem( first, false );
            selectionManager.SelectItem( first, false );
            selectionManager.SelectRange( last, false );
        }
    }