Context menu left empty header cell

[Gerald]

Dear Telerik-guys,

Using your GridView I'd like to create the following:

In the grid there is an empty 'cell' in the header (on the left, see Grid1.png), here I'd like to create a context menu for some general gridfunctions (like Grid2.png).

Could you give me some pointers on how to accomplish this?

Thanks in advance!

[Jack]

Hi Gerald,

Thank you for this question. The specified cell is an element of type GridTableHeaderCellElement and you can draw an image inside it when you enable the custom drawing and handle the CellPaint event. Here is a sample:

this.radGridView1.EnableCustomDrawing = true;
void radGridView1_CellPaint(object sender, GridViewCellPaintEventArgs e)
{
    if (e.Cell is GridTableHeaderCellElement)
    {
        e.Graphics.DrawImage(Resources.arrow, 2, 2);
    }
}

To add a context menu, handle the MouseDown event of RadGridView:

void radGridView1_MouseDown(object sender, MouseEventArgs e)
{
    if (e.Button == System.Windows.Forms.MouseButtons.Right)
    {
        GridTableHeaderCellElement cell = this.radGridView1.ElementTree.GetElementAtPoint(e.Location) as GridTableHeaderCellElement;
        if (cell != null)
        {
            RadDropDownMenu menu = new RadDropDownMenu();
            menu.Items.Add(new RadMenuItem("Item 1"));
            menu.Items.Add(new RadMenuItem("Item 2"));
            menu.Items.Add(new RadMenuItem("Item 3"));
            menu.Show(this.radGridView1, e.Location);
        }
    }
}

I hope this helps.

 

Regards,
Jack
the Telerik team

[Gerald]

Hi Jack,

Just what I needed!
Thank you!