C#播放MP3音乐文件

网上搜集调整，测试通过。

记录

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 = 260)]        private string Name = "";        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]        private string durLength = "";        [MarshalAs(UnmanagedType.LPTStr, SizeConst = 128)]        private string TemStr = "";        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 = 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;        }                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);            ilong = APIClass.mciSendString(Name, TemStr, TemStr.Length, 0);            //ilong = APIClass.mciSendString("set media time format milliseconds", TemStr, TemStr.Length, 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);                durLength = durLength.Trim();                if (durLength == "")                {                    return mc.iPos = 0;                }                mc.iPos = unchecked((int)(Convert.ToInt32(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        );    }}