Row Selection by Checkbox Column only

[Lance]

I  have an unbound checkbox column that can be used to select rows in the grid. But I also need to disable the default method of selecting and highlighting the current row by clicking on it. I would only like to select and highlight the rows that have their respective checkboxes clicked.

I can't find any property that would disable row selection, so how can this be achieved?

[George]

Hi Lance,

Thank you for writing.

In order to have such functionality you should intercept the mouse input. You can execute custom logic if RadCheckmark is clicked. This must happen in a custom GridDataRowBehavior:

class MyRowBehavior : GridDataRowBehavior
{
    public override bool OnMouseDown(MouseEventArgs e)
    {
        RadCheckmark element = this.GridControl.ElementTree.GetElementAtPoint(e.Location) as RadCheckmark;
        if (element != null)
        {
            if (element.CheckState == ToggleState.On)
            {
                element.CheckState = ToggleState.Off;
            }
            else
            {
                element.CheckState = ToggleState.On;
            }

            GridCheckBoxCellElement cell = element.Parent.Parent as GridCheckBoxCellElement;
            cell.RowInfo.IsSelected = element.CheckState == ToggleState.On ? true : false;
        }

        return false;
    }
}

Now you can register the new behavior and configure the grid:

BaseGridBehavior baseBehavior = grid.GridBehavior as BaseGridBehavior;
baseBehavior.UnregisterBehavior(typeof(GridViewDataRowInfo));
baseBehavior.RegisterBehavior(typeof(GridViewDataRowInfo), new MyRowBehavior());

grid.Columns.Add(new GridViewCheckBoxColumn());
grid.Rows.AddNew();
grid.Rows.AddNew();
grid.Rows.AddNew();
grid.MultiSelect = true;
grid.CurrentRow = null;

I hope this helps.

Regards,
George
Telerik