WPF selection of a TreeView item as context menu is called

Question

This problem relates mainly to context menus, but in my specific case it\'s about a TreeView control.

The TreeView item contains a StackPanel, and on that StackPanel

Answer 1

You can use a behavior for it:

using System.Windows;
using System.Windows.Controls;
using System.Windows.Interactivity;

public class SelectOnRMBBehavior : Behavior
{
    public static readonly DependencyProperty CurrentItemProperty = DependencyProperty.Register("CurrentItem", typeof(TreeViewItem), typeof(SelectOnRMBBehavior), new PropertyMetadata(null));

    public TreeViewItem CurrentItem
    {
        get
        {
            return (TreeViewItem)GetValue(CurrentItemProperty);
        }
        set
        {
            SetValue(CurrentItemProperty, value);
        }
    }

    protected override void OnAttached()
    {
        base.OnAttached();

        AssociatedObject.PreviewMouseRightButtonDown += AssociatedObject_PreviewMouseRightButtonDown;
    }

    private void AssociatedObject_PreviewMouseRightButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
    {
        if (CurrentItem!=null)
        {
            CurrentItem.IsSelected = true;
        }
    }

    protected override void OnDetaching()
    {
        AssociatedObject.PreviewMouseRightButtonDown -= AssociatedObject_PreviewMouseRightButtonDown;

        base.OnDetaching();
    }
}

and then just put your behavior to the element which will be clicked(I suppose a container in DataTemplate):