【wpf基础】wpf MediaElement全屏播放视频功能

 最近在研究如何将视频全屏播放，一开始思路A：弹窗将MediaElement对象add到一个新的全屏窗体，报错

指定的元素已经是另一个元素的逻辑子元素。请先将其断开连接。

后续转换思路B：将本窗体其他控件隐藏掉，然后窗体最大化，去掉边框，然后把MediaElement设置成屏幕的宽高。

 点击【播放】，加载视频

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        MediaElement myPlayer = new MediaElement();

        public MainWindow()
        {
            InitializeComponent();

            myPlayer.Margin = new Thickness(1, 1, 1, 1);
            myPlayer.Width = ActualWidth;
            myPlayer.Height = ActualHeight;

            myPlayer.LoadedBehavior = MediaState.Manual;
            var mp4_path = AppDomain.CurrentDomain.BaseDirectory + "video.mp4";
            myPlayer.Source = new Uri(mp4_path, UriKind.RelativeOrAbsolute);

            (Content as Grid).Children.Add(myPlayer);
        }

        void myContent_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            if (FullScreenHelper.IsFullscreen(this))
                FullScreenHelper.ExitFullscreen(this);
            else
                FullScreenHelper.GoFullscreen(this);
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            myPlayer.Play();
        }

        private void Window_SizeChanged(object sender, SizeChangedEventArgs e)
        {
            myPlayer.Width = ActualWidth;
            myPlayer.Height = ActualHeight;
        }

    }
}

 双击视频，全屏播放

有需要这个效果的可以参考

源码：http://pan.baidu.com/s/1mi8qII8