private void click(object sender, System.Windows.Input.MouseButtonEventArgs e) { if (i == 1) //打开了主窗口 { img.Source = new BitmapImage(new Uri("pack://application:,,,/resource/swopen.png")); //变换图标 window.Hide(); //隐藏主窗口 i = 0; //主窗口为隐藏 } else//没有打开主窗口 { img.Source = new BitmapImage(new Uri("pack://application:,,,/resource/swhide.png")); //变换图标 window.Show(); //显示主窗口 i = 1; //主窗口为显示 } }