摘要

在設置程序開始運行時，讓視頻全屏播放時，直接設置

windowsMediaPlay.fullScreen = true;

會報錯，代碼如下

                windowsMediaPlay.URL = _videoPath;
                windowsMediaPlay.Ctlcontrols.play();
                windowsMediaPlay.fullScreen = true;
                windowsMediaPlay.ClickEvent += windowsMediaPlay_ClickEvent;
                windowsMediaPlay.KeyUpEvent 
 
+= windowsMediaPlay_KeyUpEvent;
                windowsMediaPlay.StatusChange += windowsMediaPlay_StatusChange;

錯誤

抱著相信微軟的心情，就在猜想，可能是位置不對，是不是必須視頻在播放中才可以設置全屏？

所以在視頻狀態變化的事件中，這樣設置

        void windowsMediaPlay_StatusChange(object sender, EventArgs e)
        {
            /*  
             * 0 Undefined Windows Media Player is in an undefined state.(未定義) 
               1 Stopped Playback of the current media item is stopped.(停止) 
               2 Paused Playback of the current media item is paused. When a media item is paused, resuming 
 
playback begins from the same location.(停留) 
               3 Playing The current media item is playing.(播放) 
               4 ScanForward The current media item is fast forwarding. 
               5 ScanReverse The current media item is fast rewinding. 
               6 Buffering The current media item is getting additional data from the server.(轉換) 
               7 Waiting Connection is established, but the server is not sending data. Waiting for session to begin.(暫停) 
               8 MediaEnded Media item has completed playback. (播放結束) 
               9 Transitioning Preparing new media item. 
               10 Ready Ready to begin playing.(準備就緒) 
               11 Reconnecting Reconnecting to stream.(重新連接) 
           
 
*/
            //判斷視頻是否已停止播放  
            if ((int)windowsMediaPlay.playState == 1)
            {
                //停頓2秒鐘再重新播放  
                System.Threading.Thread.Sleep(1000);
                //重新播放  
                windowsMediaPlay.Ctlcontrols.play();
            }
            else if ((int)windowsMediaPlay.playState == 3)
            {
                windowsMediaPlay.fullScreen = true;
            }
        }

親測，解決問題。

[Winform]Media Player組件全屏播放的設置