How do I tell if a playlist is a music playlist in c#?

Question

I've attached my code so far, my problem is all the playlists return "auto" or "wpl" for their type. (This is all using a WMPLib reference)

mediaplayer = new WindowsMediaPlayer();
// Init. Playlists
IWMPPlaylistCollection plcollection = mediaplayer.playlistCollection;
plarray = plcollection.getAll();
int i = 0, count = plarray.count;
string[] t = new string[count];

// Here is where I want to sort out non-music playlists
// And add them to the ListBox
for (i = 0; i < count - 1; i++)
   t[i] = plarray.Item(i).getItemInfo("PlaylistType");

for (i = 0; i < count; i++ )
   PlaylistBox.Items.Add("" + plarray.Item(i).name);

Unrelated, but if you know how to attach the playlists as data instead of strings that would be helpful too :)

What do you expect each to return? Also, a playlist is not restricted to a single media type. — Grant Thomas, Mar 17 '11 at 00:36
I'm making a music player, so I need to be sure that the playlists only have music in them. Is that not possible? — Eric Fossum, Mar 17 '11 at 01:07

score 1 · Accepted Answer · answered Mar 17 '11 at 01:40

I guess you can iterate through playlist items and if item's "MediaType" attribute equals "audio" deem this list as the one containing audio files. Smth like this:

private bool ListHasAudio(IWMPPlaylist playList)
{
    if (playList != null && playList.count > 0)
    {
        for (int n = 0; n < playList.count; n++)
        {
            IWMPMedia media = playList.get_Item(n);
            string mediaType = media.getItemInfo("MediaType");
            if (mediaType != null && mediaType.Equals("audio", StringComparison.CurrentCultureIgnoreCase))
                return true;
        }
    }
    return false;
}

here's how you can use it:

var mediaplayer = new WindowsMediaPlayer();
// Init. Playlists
IWMPPlaylistCollection plcollection = mediaplayer.playlistCollection;
var plarray = plcollection.getAll();
// Load list box items
for (int i = 0; i < plarray.count; i++)
{
    IWMPPlaylist playList = plarray.Item(i);
    if (ListHasAudio(playList))
        PlaylistBox.Items.Add(playList.name);
}

hope this helps, regards

Did not think that I'd have to iterate the lists, but that makes sense. Thanks for the answer, I've updated your code to reflect my answer, but still good stuff! — Eric Fossum, Mar 19 '11 at 22:46

How do I tell if a playlist is a music playlist in c#?

1 Answers1