The HamburgerMenu control uses the HamburgerMenuListBox control to show the menu items. You can use a DataTemplate with an Expander control with an HamburgerMenuListBox control as the Child to show submenu items:

The HamburgerMenu control uses the HamburgerMenuListBox control to show the menu items. You can use a DataTemplate with an Expander control with an HamburgerMenuListBox control as the Child to show submenu items:

You can then insert the submenu items in the tag property:

This is what the result looks like:


_Originally posted by @derSteff18 in https://github.com/MahApps/MahApps.Metro/issues/3018#issuecomment-1687413625_

I add subItems to the inner HamburgerMenuItemCollection dynamically from code behind. I set the Command for the sub-menu, but it isn't fired if I click the sub-menu. This is my code:

public partial class MainUC : UserControl
{
public MainUC()
{
InitializeComponent();
}
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
LoadPersonalizedTrend();
}
.
.
.

private void LoadPersonalizedTrend()
{
mnuTrendCollection.Clear();
HamburgerMenuGlyphItemForTrend mnu = new HamburgerMenuGlyphItemForTrend();
mnu.IsPersonalizedTrend = true;
mnu.Label = "Test 1";
mnu.Glyph = "ChartMultiple";
mnu.Command = new DelegateCommand(Execute);
mnuTrendCollection.Add(mnu);
}

private void Execute(object o)
{
MessageBox.Show("Hello");
}

}

public class DelegateCommand : ICommand
{
private readonly Func _canExecute;
private readonly Action _execute;

public DelegateCommand(Action execute) : this(execute, s => true)
{
}

public DelegateCommand(Action execute, Func canExecute)
{
_execute = execute;
_canExecute = canExecute;
}

public bool CanExecute(object parameter)
{
return _canExecute(parameter);
}

public void Execute(object parameter)
{
_execute(parameter);
}

public event EventHandler CanExecuteChanged;
}

If I do the same with a first level menu item it works. Itried also to use the ItemClick event, but it doesn't work for the subitems.

Thanks

Start by reproducing the issue with HamburgerMenu, HamburgerMenuListBox, and a dynamically populated nested HamburgerMenuItemCollection. Trace how Command and ItemClick are handled for first-level and submenu items; done means commands or item-click events fire for dynamically added submenu items.

Written by the indexing model from the issue text.