Using HierarchicalDataTemplate in a context menu

[Nic]

Hi,

With Hristo's help, I have got a menu working with the HierarchicalDataTemplate.See http://www.telerik.com/community/forums/silverlight/menu/radmenu-and-hierarchicaldatatemplate.aspx

I now want to do the same with the RadContextMenu, and have applied the same concept by creating a derived RadContextMenu (named MyContextMenu) and overriding the same methods (inserting the same code).

However, when I then try to attach my context menu to an element like so:

myTextBlock.SetValue(MyContextMenu.ContextMenuProperty, contextMenuInstance);

then an ArgumentNullException is thrown from the above line (Value cannot be null. Parameter name: meth).

Is there perhaps some thing I should be initializing in my derived class MyContextMenu's constructor?

Thanks,
Nic

[Hristo]

Hi Nic,

This is indeed a bug and will be fixed for the next (Q1) release. I have updated your Telerik Points.
As a workaround for the moment you can define OnEventTriggered method in your inherited context menu like this:

public class MyContextMenu : RadContextMenu
{
    public static void OnEventTriggered(object sender, EventArgs e)
    {
        FrameworkElement fe = sender as FrameworkElement;
        if (fe != null)
        {
            RadContextMenu menu = GetContextMenu(fe);
            if (menu != null)
            {
                menu.IsOpen = false;
                bool modifierKeyPressed = (Keyboard.Modifiers & menu.ModifierKey) == menu.ModifierKey;
                if (modifierKeyPressed)
                {
                    menu.IsOpen = true;
                }
            }
        }
    }
}

Let me know if this works for you.

Best wishes,
Hristo
the Telerik team

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[Nic]

Hi Hristo,

Thanks for pointing out this as a bug and providing a temporary workaround to keep me going until the Q1 release. I'm looking forward to that.

Much appreciated!
Nic