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Reading Attribute Values from a CD or DVD

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[The feature associated with this page, Windows Media Player SDK, is a legacy feature. It has been superseded by MediaPlayer. MediaPlayer has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer instead of Windows Media Player SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Throughout this topic, the Player object was defined in the following manner:

AxWMPLib.AxWindowsMediaPlayer Player;
using WMPLib;

The following C# example code retrieves the values of all attributes in the current disc that is in the drive and writes them to a file.

private void logDiscAttributes()
{
    int iCDCount = 0; // Count of CD and DVD drives
    int iAttrCount = 0; // Attribute count.
    int iPLCount = 0; // Playlist item count.

    IWMPCdromCollection cdCollection;
    IWMPPlaylist playlist;
    IWMPMedia media;
    string strAttribName = "";
    string strAttribValue = "";
    string strText = "";

    // Create a StreamWriter object to write
    // the output to a file.
    StreamWriter sw = new StreamWriter(strOutFile, true);

    cdCollection = Player.cdromCollection;
    iCDCount = cdCollection.count;

    // Loop through the CD and DVD drives.
    for (int i = 0; i < iCDCount; i++)
    {
        playlist = cdCollection.Item(i).Playlist;

        // Loop through the playlist attributes.
        iAttrCount = playlist.attributeCount;
        for (int j = 0; j < iAttrCount; j++)
        {
            strText += "Playlist Attribute: \t";
            strAttribName = playlist.get_attributeName(j);
            strText += "\t" + strAttribName + "\t";
            strAttribValue = playlist.getItemInfo(strAttribName);
            strText += strAttribValue + "\n";
        }

        // Loop through the playlist.
        iPLCount = playlist.count;
        for (int k = 0; k < iPLCount; k++)
        {
            media = playlist.get_Item(k);

            // Loop through the media attributes.
            iAttrCount = media.attributeCount;
            for (int m = 0; m < iAttrCount; m++)
            {
                strText += "Track or Chapter [" + m.ToString() + "]";
                strAttribName = media.getAttributeName(m);
                strText += "\t" + strAttribName + "\t";
                strText += "Read Only: " + media.isReadOnlyItem(strAttribName) + "\t";
                strAttribValue = media.getItemInfo(strAttribName);
                strText += strAttribValue + "\n";
            }
        }
    }

    sw.Write(strText);
    sw.Close();

    MessageBox.Show(strOutFile + " created");
}

Media Item Attributes

Media Object