WPF: How can you add a new menuitem to a menu at runtime?

c#, wpf

Solution

//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);

Problem

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.

Original source