Prevent selection of cells

[Thomas]

Hello,

i have implemented a method that prevent the selections of cells in the first 3 columns. this method works, but it is extreme slowly. This is my method. Is there a better way to prevent selection?

private void Event_SelectionChanged(object sender, EventArgs e)
 {
       GridViewCellInfo[] cells = (from GridViewCellInfo entry in
           this.SelectedCells where entry.ColumnInfo.Index <
           CurveContentGridView.FIRST_DATACOLUMN_INDEX ||
           entry.RowInfo.Index == -1
            select entry).ToArray();

        for (int i = 0; i < cells.Length; i++)
        {
             cells[i].IsSelected = false;
        }
}

[Svett]

Hi Thomas,

When you change the IsSelected property of GridViewCellInfo instances you cause SelectionChanged event to be fired. Therefore, the logic that is inside the event handler is executed again. You can create a boolean field which will be updated when you are clearing the cells that you do not want to be selected. You can use the following code snippet:

private bool resetSelection = false;

private void radGridView2_SelectionChanged(object sender, EventArgs e)
{
    if (resetSelection)
    {
        return;
    }

    GridViewCellInfo[] cells = (from GridViewCellInfo entry in
                                    this.radGridView2.SelectedCells
                                where entry.ColumnInfo.Index <
                                    FIRST_DATACOLUMN_INDEX ||
                                    entry.RowInfo.Index == -1
                                select entry).ToArray();

    resetSelection = true;
    for (int i = 0; i < cells.Length; i++)
    {
        cells[i].IsSelected = false;
    }
    resetSelection = false;
}

Best wishes,
Svett
the Telerik team