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Empty grid and contextmenu.

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GridView
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Jose Mejia
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Jose Mejia asked on 18 Aug 2010, 02:06 PM
Hello everybody!

I have empty grid (Rows.Count == 0) and I need that  it's context menu openning on this grid.
Is it possible to force context menu openning handling, for example, right mouse click?

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Alexander
Telerik team
answered on 23 Aug 2010, 02:01 PM
Hello Jose Mejia,

Thank you for your question.

You can create a custom context menu by using this code snippet:

private RadDropDownMenu menu;
 
private void CreateCustomMenu()
{
    menu = new RadDropDownMenu();
    RadMenuItem menuItem = new RadMenuItem("Item1");
    menuItem.Click += new EventHandler(menuItem_Click);
    menu.Items.Add(menuItem);
}

Then you can use the MouseDown event of the RadGridView control to show the context menu:

private void radGridView1_MouseDown(object sender, MouseEventArgs e)
{
    if (e.Button != MouseButtons.Right)
    {
        return;
    }
 
    menu.Show(this.radGridView1, e.X, e.Y);
}
 
private void menuItem_Click(object sender, EventArgs e)
{
}

I hope it helps in your scenario.

Best regards,
Alexander
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Jose Mejia
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answered on 25 Aug 2010, 07:55 AM
Hello.
Thanks for reply.
One more question:
I have following code for handling menu openning:
private void _pointGridView_ContextMenuOpening(object sender, ContextMenuOpeningEventArgs e)
        {
             
             
            if (_pointGridView.CurrentRow is GridViewDataRowInfo)
            {
                if (_pointContextMenu == null || _pointContextMenu.IsDisposed)
                {
                    _pointContextMenu = GetPointMenu();
                }
 
                e.ContextMenu = _pointContextMenu;
                e.Cancel = false;
                return;
            }
 
            for (int i = 0; i < e.ContextMenu.Items.Count; i++)
            {
                if (!PointFilterMenuItems.Contains(e.ContextMenu.Items[i].Text))
                {
                     
                    e.ContextMenu.Items[i].Visibility = ElementVisibility.Collapsed;
                }
            }
        }

It works great but when I click on a column header it shows context menu (because expr(_pointntGridView.CurrentRow is GridViewDataRowInfo) is true). Is there any possibility to prevent this? For example, when I click on a column header nothing happens.
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Alexander
Telerik team
answered on 27 Aug 2010, 04:56 PM
Hello Jose Mejia,

Thank you for writing me back.

Please consider the following code snippet. It demonstrates how to check whether the clicked cell is from the header row:

private void radGridView1_ContextMenuOpening(object sender, ContextMenuOpeningEventArgs e)
{
    if (e.ContextMenuProvider is GridHeaderCellElement)
    {
        e.Cancel = true;
    }
}

I hope it helps. Please do not hesitate to write back, if you have further questions.

Kind regards,
Alexander
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Jose Mejia
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Alexander
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Jose Mejia
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