C# 如何设置Mediaplayer的播放列表索引（ExpressionMediaPlayer:Mediaplayer）

我的XAML页面上有一个Mediaplayer控件，如下所示：

<CustomMediaElement:CustomMediaPlayer 
                x:Name="custMediaElement"  
                VerticalAlignment="Center"
                Width="600" Height="300"  Visibility="Collapsed" />

private void setPlayList()
            {
                IEnumerable eLevelData = null;
                eLevelData = pMainPage.GetDataFromDictonary(pMainPage.strChildFolderID);

                    foreach (RMSMedia folderItems in eLevelData)
                    {
                        string strmediaURL = folderItems.strMediaFileName;
                        if (hasExtension(strmediaURL) == "wmv" || hasExtension(strmediaURL) == "mp4" || hasExtension(strmediaURL) == "mp3" || hasExtension(strmediaURL) == "mpg")
                        {
                            PlaylistItem playListItem = new PlaylistItem();
                            string thumbSource = folderItems.strAlbumcoverImage;
                            playListItem.MediaSource = new Uri(strmediaURL, UriKind.RelativeOrAbsolute);

                            playListItem.Title = folderItems.strAlbumName;

                            if (!string.IsNullOrEmpty(thumbSource))

                                playListItem.ThumbSource = new Uri(thumbSource, UriKind.RelativeOrAbsolute);

                            playList.Items.Add(playListItem);
                        }
                }


                custMediaElement.Playlist = playList;

            }

int currentPlayListItem = listBox.SelectedIndex;
custMediaElement.GoToPlaylistItem(currentPlayListItem);

现在，当用户单击包含所有歌曲标题的列表框项目时，我想更改Mediaplayer的播放索引

当用户点击歌曲标题列表中的第三首歌曲标题时，mediaPlayer应播放第三首歌曲，或者如果用户点击第七首歌曲标题，mediaPlayer应播放第七首歌曲

我的座右铭是从列表框中选择所选索引，并将其分配给mediaPlayer的播放列表索引

当我在

播放列表中添加一块手表时

我可以看到，

播放列表

，

项目

，

[0]

播放索引1

播放列表

，

项目

，

[1]

播放索引2

但是，当我试图从代码设置它时，相同的属性

playlyindex

似乎不可用。请帮忙

谢谢，

---

Subhen

没有那么复杂。我只是不确定方法。所以答案如下：

<CustomMediaElement:CustomMediaPlayer 
                x:Name="custMediaElement"  
                VerticalAlignment="Center"
                Width="600" Height="300"  Visibility="Collapsed" />

private void setPlayList()
            {
                IEnumerable eLevelData = null;
                eLevelData = pMainPage.GetDataFromDictonary(pMainPage.strChildFolderID);

                    foreach (RMSMedia folderItems in eLevelData)
                    {
                        string strmediaURL = folderItems.strMediaFileName;
                        if (hasExtension(strmediaURL) == "wmv" || hasExtension(strmediaURL) == "mp4" || hasExtension(strmediaURL) == "mp3" || hasExtension(strmediaURL) == "mpg")
                        {
                            PlaylistItem playListItem = new PlaylistItem();
                            string thumbSource = folderItems.strAlbumcoverImage;
                            playListItem.MediaSource = new Uri(strmediaURL, UriKind.RelativeOrAbsolute);

                            playListItem.Title = folderItems.strAlbumName;

                            if (!string.IsNullOrEmpty(thumbSource))

                                playListItem.ThumbSource = new Uri(thumbSource, UriKind.RelativeOrAbsolute);

                            playList.Items.Add(playListItem);
                        }
                }


                custMediaElement.Playlist = playList;

            }

int currentPlayListItem = listBox.SelectedIndex;
custMediaElement.GoToPlaylistItem(currentPlayListItem);