Question

I’m using C# and I have a list of objects, and I want to show all the objects in a context menu, each object is shown as a MenuItem.

When one MenuItem is clicked, I want to refer to the associated object in the MenuItem_Click() function.

List<MyObject> MyList = new List<MyObject>();
ContextMenu menu = new ContextMenu();

foreach(MyObject o in MyList)
{
     MenuItem item = new MenuItem();
     item.Header = o.Name;
     item.Click += MenuItem_Click;
     menu.Items.add(item);
}

menu.IsOpen=true;

void MenuItem_Click(object sender, RoutedEventArgs e){

    // Assume the 5th MenuItem is clicked, I need to refer to the 5th object in MyList
    // how to do it?

}

Answer 1

A quick dirty hack that fits the code you currently have: use the Tag property.

foreach(MyObject o in MyList)
{
    MenuItem item = new MenuItem();
    item.Header = o.Name;
    item.Tag = o;
    item.Click += MenuItem_Click;
    menu.Items.add(item);
}

then you can refer to it this way:

private void MenuItem_Click(object sender, RoutedEventArgs e)
{
    var myObj = (MyObject)((MenuItem)sender).Tag;
}