C#播放MP3源代码

代码如下：

 using System;
 using System.Runtime.InteropServices;
 using System.Text;
 using System.IO ;
 using System.Windows.Forms;
 namespace WindowsApplication7
 {
 /// <summary>
 /// clsMci 的摘要说明。
 /// </summary>
 　public class clsMCI
 {
 public clsMCI()
 {
 //
 // TODO: 在此处添加构造函数逻辑
 //
 　　}

 //定义API函数使用的字符串变量
 　　[MarshalAs(UnmanagedType.ByValTStr,SizeConst=)]
 private string Name = "" ;
 [MarshalAs(UnmanagedType.ByValTStr,SizeConst=)]
 private string durLength = "" ;
 [MarshalAs(UnmanagedType.LPTStr,SizeConst=)]
 private string TemStr ="";
 int ilong;
 //定义播放状态枚举变量
 　　public enum State
 {
 mPlaying = ,
 mPuase = ,
 mStop =
 };
 //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(,Convert.ToChar(" "));
 Name = Name.PadLeft(,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() + Name + Convert.ToChar() + " alias media";
 ilong = APIClass.mciSendString("close all", TemStr, TemStr.Length , );
 ilong = APIClass.mciSendString( Name, TemStr, TemStr.Length, );
 ilong = APIClass.mciSendString("set media time format milliseconds", TemStr, TemStr.Length , );
 mc.state = State.mStop;
 }
 catch
 {
 }
 }
 }
 //播放  http://sosoft.cnblogs.com/
 　　public void play()
 {
 TemStr = "";
 TemStr = TemStr.PadLeft(,Convert.ToChar(" "));
 APIClass.mciSendString("play media", TemStr, TemStr.Length , );
 mc.state = State.mPlaying ;
 }
 //停止
 　　public void StopT()
 {
 TemStr = "";
 TemStr = TemStr.PadLeft(,Convert.ToChar(" "));
 ilong = APIClass.mciSendString("close media", TemStr, , );
 ilong = APIClass.mciSendString("close all", TemStr, , );
 mc.state = State.mStop ;
 }

 public void Puase()
 {
 TemStr = "";
 TemStr = TemStr.PadLeft(,Convert.ToChar(" "));
 ilong = APIClass.mciSendString("pause media", TemStr, TemStr.Length, );
 mc.state = State.mPuase ;
 }
 private string GetCurrPath(string name)
 {
 if(name.Length <) return "";
 name = name.Trim();
 name = name.Substring(,name.Length-);
 return name;
 }
 //总时间
 　　public int Duration
 {
 get
 {
 durLength = "";
 durLength = durLength.PadLeft(,Convert.ToChar(" ")) ;
 APIClass.mciSendString("status media length", durLength, durLength.Length, );
 durLength = durLength.Trim();
 if(durLength == "") return ;
 return (int)(Convert.ToDouble(durLength) / 1000f);
 }
 }

 //当前时间
 　　public int CurrentPosition
 {
 get
 {
 durLength = "";
 durLength = durLength.PadLeft(,Convert.ToChar(" ")) ;
 APIClass.mciSendString("status media position", durLength, durLength.Length, );
 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
 );
 }
 }

 clsMCI cm = new clsMCI();
             cm.FileName = "keleyi.mp3";//文件名
             cm.play();