Empty grid and contextmenu.

[Jose Mejia]

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?

[Alexander]

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
the Telerik team

[Jose Mejia]

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.

[Alexander]

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
the Telerik team