Button下拉式菜单

对于Button下拉式菜单，代码如下：

 

   
                           
                               
                                   
                                       
                                       
                                   
                                   
                                   
                                   
                               
                           

Backside代码如下：

   private void PopupMenu_Click(object sender, RoutedEventArgs e)
        {

            this.contextMenu.PlacementTarget = this.PopupMenu;
            this.contextMenu.Placement = System.Windows.Controls.Primitives.PlacementMode.Bottom;
            this.contextMenu.IsOpen = true;
        }