[Winform]Media Player播放控制面板控制，单击事件截获

摘要

在项目中有这样的一个需求，需要在一台宣传机器上循环播放一段视频，并在体验的用户单击鼠标左键的时候推出全屏，可以让用户体验电脑的其它功能。

解决方案

考虑到都是windows系统的，所以采用了windows自带的播放器，Windows Media Player Com组件作为视频播放器。

如图

但是，为了更好满足需求，下面的播放控制面板需要隐藏，该怎么做呢？最后找到解决方案，设置播放器属性

windowsMediaPlay.uiMode = "none";

循环播放的代码，这里为播放器添加播放列表，代码如下：

 string[] filePaths = Directory.GetFiles(_videoDirPath).Where(x => x.EndsWith(".mp4") || x.EndsWith(".wmv")).ToArray();
                //添加循环播放列表
                foreach (var item in filePaths)
                {
                    windowsMediaPlay.currentPlaylist.appendItem(windowsMediaPlay.newMedia(item));
                }
                //不再任务栏显示
                this.ShowInTaskbar = false;
                this.FormClosing += VideoFrm_FormClosing;
                windowsMediaPlay.ClickEvent += windowsMediaPlay_ClickEvent;
                windowsMediaPlay.KeyUpEvent += windowsMediaPlay_KeyUpEvent;
                windowsMediaPlay.StatusChange += windowsMediaPlay_StatusChange;
                windowsMediaPlay.ErrorEvent += windowsMediaPlay_ErrorEvent;
                windowsMediaPlay.DoubleClickEvent += windowsMediaPlay_DoubleClickEvent;
                windowsMediaPlay.Ctlcontrols.play();

那么，如何在用户单击的时候，让程序最小化？

注意

在uiMode = "none"的情况下，单击会触发视频暂停的事件，并不会退出。视频暂停，是不是视频状态变化了呢？所以在截获单击视频事件，我们完全可以在视频暂停的时候，对其进行截获。statechange事件对应的方法如下：

       void windowsMediaPlay_StatusChange(object sender, EventArgs e)
        {
            /*
             * 0 Undefined Windows Media Player is in an undefined state.(未定义)
               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.(转换)
               7 Waiting Connection is established, but the server is not sending data. Waiting for session to begin.(暂停)
               8 MediaEnded Media item has completed playback. (播放结束)
               9 Transitioning Preparing new media item.
               10 Ready Ready to begin playing.(准备就绪)
               11 Reconnecting Reconnecting to stream.(重新连接)
           */
            try
            {
                switch (windowsMediaPlay.playState)
                {
                    case WMPLib.WMPPlayState.wmppsBuffering:
                        break;
                    case WMPLib.WMPPlayState.wmppsLast:
                        break;
                    case WMPLib.WMPPlayState.wmppsMediaEnded:
                        break;
                    case WMPLib.WMPPlayState.wmppsPaused:
                        //单击了视频则退出
                        HideVideo();
                        break;
                    case WMPLib.WMPPlayState.wmppsPlaying:
                        if (!windowsMediaPlay.fullScreen)
                        {
                            windowsMediaPlay.fullScreen = true;
                        }
                        break;
                    case WMPLib.WMPPlayState.wmppsReady:
                        break;
                    case WMPLib.WMPPlayState.wmppsReconnecting:
                        break;
                    case WMPLib.WMPPlayState.wmppsScanForward:
                        break;
                    case WMPLib.WMPPlayState.wmppsScanReverse:
                        break;
                    case WMPLib.WMPPlayState.wmppsStopped:
                        break;
                    case WMPLib.WMPPlayState.wmppsTransitioning:
                        break;
                    case WMPLib.WMPPlayState.wmppsUndefined:
                        break;
                    case WMPLib.WMPPlayState.wmppsWaiting:

                        break;
                    default:
                        break;
                }
            }
            catch (Exception ex)
            {
                LogInfoData.WriteLog(new LogInfo
                           {
                               Dt = DateTime.Now,
                               IsSend = false,
                               Message = ex.Message,
                               Op = "media_state_change_err"
                           });
            }
        }

关于双击全屏截获的逻辑也可以在这里处理，双击之前肯定会有一次单击，所以在这里也能进行双击最大化的处理。