Null exception exception While navigating to PlayListItem

Question

I am trying to play the selected media from a PlayList if the selected index is not zero, as shown below:

if (playList.Items.Count == 0)
   {
      setPlayList();
          if (selectedIndex!= 0)
               { 
                  if(custMediaElement.Playlist!=null)
                  custMediaElement.GoToPlaylistItem(selectedIndex);
               }
    }

But I get a Null Reference exception when trying to jump to a PlayList element using the selected index, as described above. This works fine if I don’t use it custMediaElement.GoToPlaylistItem(selectedIndex);, but in this case Media Player always plays the 1st element, no matter which song I select from the list.

Below are a few details from Stack Trace:

ExpressionMediaPlayer.MediaPlayer.DoOpenPlaylistItem(PlaylistItem playlistItem)
at ExpressionMediaPlayer.MediaPlayer.GoToPlaylistItem(Int32 playlistItemIndex)

Thank,

Subhen

Answer 1

After you dug the resulting method:

 custMediaElement.GoToPlaylistItemOnNextTick(currentPlayListItem);