Question

I have a simple WPF application with a menu. I need to add menu items dynamically at runtime. When I simply create a new menu item, and add it onto its parent MenuItem, it does not display in the menu, regardless of if UpdateLayout is called.

What must happen to allow a menu to have additional items dynamically added at runtime?

Note: the following code doesn’t work.

            MenuItem mi = new MenuItem();             mi.Header = 'Item to add';             mi.Visibility = Visibility.Visible;             //addTest is a menuitem that exists in the forms defined menu             addTest.Items.Add(mi);             addTest.UpdateLayout(); 

At the moment, the default menu items are defined in the xaml file. I want to add additional menu items onto this menu and its existing menu items. However, as stated, the above code does nothing.

Answer 1

//Add to main menu MenuItem newMenuItem1 = new MenuItem(); newMenuItem1.Header = 'Test 123'; this.MainMenu.Items.Add(newMenuItem1);  //Add to a sub item MenuItem newMenuItem2 = new MenuItem(); MenuItem newExistMenuItem = (MenuItem)this.MainMenu.Items[0]; newMenuItem2.Header = 'Test 456'; newExistMenuItem.Items.Add(newMenuItem2);