wpf的mvvmlight控件事件绑定

先use命名空间

 xmlns:intr="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

然后在需要绑定事件的控件上加上（ListViewLoadedCommand是绑定命令，lvmenu是绑定的元素）

<intr:Interaction.Triggers>
     <intr:EventTrigger EventName="Loaded">
          <intr:InvokeCommandAction Command="{Binding Path=ListViewLoadedCommand}" CommandParameter="{Binding ElementName=lvmenu}">
          </intr:InvokeCommandAction>
     </intr:EventTrigger>
</intr:Interaction.Triggers>

后台代码

 #region 事件绑定
        private RelayCommand<ListView> _listViewLoadedCommand;
        /// <summary>
        /// 菜单点击事件
        /// </summary>
        public RelayCommand<ListView> ListViewLoadedCommand
        {
            get
            {
                if (_listViewLoadedCommand == null)
                {
                    _listViewLoadedCommand = new RelayCommand<ListView>((lv) => ShowForm(lv));
                }
                return _listViewLoadedCommand;
            }
            set { _listViewLoadedCommand = value; }
        }

        //显示菜单
        private void ShowForm(ListView lv)
        {
            _lvmeun = (ListView)lv;
            //_lvmeun.MouseDown += lvmeun_MouseDown;
            _lvmeun.PreviewMouseDoubleClick += _lvmeun_PreviewMouseDoubleClick;
        }

        private void _lvmeun_PreviewMouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            e.Handled = true;
            var lv = (ListView)sender;
            if (lv.SelectedItem != null)
            {
                MessageBox.Show(((SystemMeun)lv.SelectedItem).name);
            }
        }
        #endregion