Question

我正在尝试创建一个视频播放器，使用AxWindowsMediaPlayer一个接一个地播放一组视频。它目前在给定集合中播放一个视频，但不播放其他视频。我正在尝试实现下面示例链接中显示的方法，以便创建由PlayStateChange属性的案例8触发的自动播放方法，＆＃34;媒体完成播放。＆＃34;但是，即使是一个视频也不是这样播放的。

https://msdn.microsoft.com/en-us/library/windows/desktop/dd562460(v=vs.85).aspx

如果需要进一步解释，请告诉我，我很乐意详细说明。我非常感谢有关为什么这种方法不起作用的任何见解，我对C＃相对较新，并没有完全掌握代表的所有复杂性。我是否需要实现for循环以滚动浏览视频数据库，在此处称为it.video？这是我的代码：

 public void playItem(Item it)
    {
        player.CreateControl();
        player.Enabled = true;
        player.enableContextMenu = false;
        player.uiMode = "none";
        player.Name = "player";
        player.PlayStateChange += new AxWMPLib._WMPOCXEvents_PlayStateChangeEventHandler(player_PlayStateChange);
        player.URL = it.video;
    }

void player_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e)
    {

       if (p_onset)
        { player.Ctlcontrols.play(); }
       else if (e.newState == 8) // Media Finished
        {
            PlayNext();
        }
        else
        {
            player.Ctlcontrols.play();
            if (!Vars.playOne)
           { PlayNext(); }
        }
      }

使用BeginInvoke更新代码，需要以某种方式实现EndInvoke：

public void playItem(Item it)
    {
        WMPLib.IWMPMedia media;
        WMPLib.IWMPPlaylist playlist = player.playlistCollection.newPlaylist("myplaylist");
        for (int x = 0; x < _presented.count; x++)       
        {
            media = player.newMedia(_presented.getItem(x).video);
            playlist.appendItem(media);

        }
        player.currentPlaylist = playlist;
        player.PlayStateChange += player_PlayStateChange;
    }

    private void player_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e)
    {
        if (e.newState == 8)
        {
            this.player.BeginInvoke(new Action(() =>
            {
               if (p_onset)
                { 
                    player.Ctlcontrols.play(); 
                }
                else
                {
                    if (!Vars.playOne)
                    {
                       //playQueue++;
                       //PlayNext(); 
                    }
                }
            }));
        }
    }

Answer 1

实现我的特定目的的最佳方式是使用播放列表方法。延迟代码似乎会导致问题。这是我的解决方案：

public void playItem(ItemsPool it) 
    {
        player.CreateControl();
        player.Enabled = true;
        player.enableContextMenu = false;
        player.uiMode = "none";
        player.Name = "player";
        player.Anchor = AnchorStyles.Left |  AnchorStyles.Right | AnchorStyles.Bottom;
        WMPLib.IWMPMedia media; 
        WMPLib.IWMPPlaylist playlist = player.playlistCollection.newPlaylist("myplaylist"); 
        for (int x = 0; x < it.count; x++) 
         { 
            media = player.newMedia(it.getItem(x).video); 
         playlist.appendItem(media);  
        } 

        player.currentPlaylist = playlist;

        if (p_onset)
        { player.Ctlcontrols.play(); }
       else
        {
            if (!Vars.playOne)
          { PlayNext(); }
         }
        }

在C＃中使用AxWindowsMediaPlayer的PlayStateChange事件播放一个又一个视频

1 个答案: