WMP Playlist Fix

//
// WMPPlayListTool - Simple Windows Media Player Playlist Controller.
// Copyright (C) 2009-2013 John Janssen
// http://www.travelisfun.net 
//
// This program is free software; you can redistribute it and/or modify
// it any way you want as long as the above copyright statement is maintained.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
//

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using Shell32;
using System.IO;

namespace WPLControlLib
{
  /// <summary>
  /// 
  /// </summary>
  public class MP3File
  {
    /// <summary>
    /// The filename without the path.
    /// </summary>
    public String FileName { get; private set; }
    /// <summary>
    /// The path of the file location.
    /// </summary>
    public string FilePath { get; private set; }

    /// <summary>
    /// The full path including filename.
    /// </summary>
    public String FullPath
    {
      get
      {
        if (FilePath.Length != 0)
          return Path.Combine(FilePath, FileName);
        return FileName;
      }
      set
      {
        FileName = value.Substring(value.LastIndexOf('\\') + 1);
        FilePath = value.Substring(0, value.LastIndexOf('\\'));
      }
    }
    public String FileExt
    {
      get
      {
        int pos = FileName.LastIndexOf('.');
        if (pos != -1)
          return FileName.Substring(pos);
        return String.Empty;
      }
    }
    public String ArtistName { get; set; }
    public String AlbumName { get; set; }
    public int TrackNumber { get; set; }
    public String SongTitle { get; set; }
    public MP3File()
    {
      FileName = string.Empty;
    }
    public MP3File(String filename)
    {
      Load(filename);
    }
    /// <summary>
    /// 
    /// </summary>
    /// <param name="filename"></param>
    /// <returns></returns>
    public Boolean Load(String filename)
    {
      FullPath = filename;
      return Load();
    }
    /// <summary>
    /// 
    /// </summary>
    /// <returns></returns>
    public Boolean Load()
    {
      if (!File.Exists(FullPath))
        return false;

      Boolean result = false;
      //create shell instance
      Shell32.Shell shell = new Shell();
      //set the namespace to file path
      Folder folder = shell.NameSpace(FilePath);
      //get ahandle to the file
      FolderItem folderItem = folder.ParseName(FileName);
      //did we get a handle ?
      if (folderItem != null)
      {
        //query information from shell regarding file
        int art = Environment.OSVersion.Version.Major < 6 ? 9 : 13;
        int alb = Environment.OSVersion.Version.Major < 6 ? 17 : 14;
        int song = Environment.OSVersion.Version.Major < 6 ? 10 : 21;
        int trk = Environment.OSVersion.Version.Major < 6 ? 19 : 26;
        ArtistName = folder.GetDetailsOf(folderItem, art);
        AlbumName = folder.GetDetailsOf(folderItem, alb);
        SongTitle = folder.GetDetailsOf(folderItem, song);
        String trackNumber = folder.GetDetailsOf(folderItem, trk);
        if (trackNumber.Length != 0)
        {
          int tracknum = 0;
          Int32.TryParse(folder.GetDetailsOf(folderItem, trk), out tracknum);
          TrackNumber = tracknum;
        }
        result = true;
      }
      //clean up
      folderItem = null;
      folder = null;
      shell = null;
      return result;
    }
  }
  /// <summary>
  /// 
  /// </summary>
  public class ShellID3TagControl
  {
    public static MP3File ReadID3Tags(String FileFullPath)
    {
      FileFullPath = Path.GetFullPath(FileFullPath);
      if (!File.Exists(FileFullPath))
        return null;
      try
      {
        //return mp3File instance
        return new MP3File(FileFullPath);
      }
      catch
      {
        return null;
      }
    }
  }
}