MVVM窗体show的弹窗事件

RestMatCutWin restMatCutWindow;//定义一个窗体的全局变量

　　private void RestMatCutWinExecute()
　　{

   if (restMatCutWindow==null)
            {
                restMatCutWindow = new RestMatCutWin();
                restMatCutWindow.Owner = Application.Current.MainWindow;
                restMatCutWindow.WindowStartupLocation = WindowStartupLocation.CenterOwner;
                restMatCutWindow.Closed += new EventHandler(restMatCutExecuteClose);
               
                restMatCutWindow.Show();
            }

　　}

  private void restMatCutExecuteClose(object sender, EventArgs e) { restMatCutWindow = null; }

　　

public ICommand RestMatCutWin { get { return new QueryCommand(RestMatCutWinExecute, IaBool); } }