WinForm播放mp3音频代码段 #region 播放音频 public class Mp3Player { //定义API函数使用的字符串变量 [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)] private string Name = ""; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)] private string durLength = ""; [MarshalAs(UnmanagedType.LPTStr, SizeConst = 128)] private string TemStr = ""; private int ilong; //定义播放状态枚举变量 public enum State { mPlaying = 1, mPuase = 2, mStop = 3 }; //结构变量 public struct structMCI { public bool bMut; public int iDur; public int iPos; public int iVol; public int iBal; public string iName; public State state; }; public structMCI mc = new structMCI(); //取得播放文件属性 public string FileName { get { return mc.iName; } set { //ASCIIEncoding asc = new ASCIIEncoding(); try { TemStr = ""; TemStr = TemStr.PadLeft(127, Convert.ToChar(" ")); Name = Name.PadLeft(260, Convert.ToChar(" ")); mc.iName = value; ilong = APIClass.GetShortPathName(mc.iName, Name, Name.Length); Name = GetCurrPath(Name); //Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media"; Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media"; ilong = APIClass.mciSendString("close all", TemStr, TemStr.Length, 0); ilong = APIClass.mciSendString(Name, TemStr, TemStr.Length, 0); ilong = APIClass.mciSendString("set media time format milliseconds", TemStr, TemStr.Length, 0); mc.state = State.mStop; } catch { } } } //播放 public void play() { TemStr = ""; TemStr = TemStr.PadLeft(127, Convert.ToChar(" ")); APIClass.mciSendString("play media", TemStr, TemStr.Length, 0); mc.state = State.mPlaying; } //停止 public void StopT() { TemStr = ""; TemStr = TemStr.PadLeft(128, Convert.ToChar(" ")); ilong = APIClass.mciSendString("close media", TemStr, 128, 0); ilong = APIClass.mciSendString("close all", TemStr, 128, 0); mc.state = State.mStop; } public void Puase() { TemStr = ""; TemStr = TemStr.PadLeft(128, Convert.ToChar(" ")); ilong = APIClass.mciSendString("pause media", TemStr, TemStr.Length, 0); mc.state = State.mPuase; } private string GetCurrPath(string name) { if (name.Length < 1) return ""; name = name.Trim(); name = name.Substring(0, name.Length - 1); return name; } //总时间 public int Duration { get { durLength = ""; durLength = durLength.PadLeft(128, Convert.ToChar(" ")); APIClass.mciSendString("status media length", durLength, durLength.Length, 0); durLength = durLength.Trim(); if (durLength == "") return 0; return (int)(Convert.ToDouble(durLength) / 1000f); } } //当前时间 public int CurrentPosition { get { durLength = ""; durLength = durLength.PadLeft(128, Convert.ToChar(" ")); APIClass.mciSendString("status media position", durLength, durLength.Length, 0); mc.iPos = (int)(Convert.ToDouble(durLength) / 1000f); return mc.iPos; } } } public class APIClass { [DllImport("kernel32.dll", CharSet = CharSet.Auto)] public static extern int GetShortPathName( string lpszLongPath, string shortFile, int cchBuffer ); [DllImport("winmm.dll", EntryPoint = "mciSendString", CharSet = CharSet.Auto)] public static extern int mciSendString( string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback ); } #endregion /* *下面的代码可以放到按钮控件内 /* #region 播放 Mp3Player mp3Play = new Mp3Player() { FileName = @"C:\ProgramData\User\music.mp3", }; mp3Play.play(); #endregion #region 暂停 Mp3Player mp3Play = new Mp3Player() { }; mp3Play.Puase(); #endregion