转：C#播放MP3的类

class MP3PLAYER
{
private const uint cchReturnLen = 256;
private StringBuilder sRet = new StringBuilder((int)cchReturnLen);
public static uint SND_ASYNC = 0x0001;              // play asynchronously
public static uint SND_FILENAME = 0x00020000;       // name is file name

[DllImport("winmm.dll")]
public static extern uint mciSendString(string lpszCommand, StringBuilder lpszReturnString, uint cchReturn, IntPtr hwndCallback);

[DllImport("Kernel32", CharSet = CharSet.Auto)]
static extern Int32 GetShortPathName(String path, StringBuilder shortPath, Int32 shortPathLength);

public void MyPlay(string name)
{
mciSendString(@"close all", null, 0, IntPtr.Zero);
mciSendString(@"open " + name + " alias song", sRet, cchReturnLen, IntPtr.Zero);         //打开，文件名的别名为song
mciSendString("play song", sRet, cchReturnLen, IntPtr.Zero);                             //播放
}

public string PlayStatus()
{
mciSendString("status song mode", sRet, cchReturnLen, IntPtr.Zero);                     //查看播放状态
return sRet.ToString();
}

public void stop()                                                                          //停止播放
{
mciSendString(@"close all", null, 0, IntPtr.Zero);
}

public void Pause()
{
mciSendString("pause song", null, 0, IntPtr.Zero);
}

public void Close()
{
mciSendString("close song", null, 0, IntPtr.Zero);
}
}