c#中用Win32API实现的媒体播放类,支持mp3\wma\wmv

这个是从别人的blog是看到的.

经过我的验证,完全可以使用,而且不仅支持mp3,还支持wma,wmv.播放wmv的话会自动弹出一个视频播放小窗口.

代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.IO;
using System.Windows.Forms;

namespace winformFlash
... {
/**////<summary>
///用Win32Api实现的媒体播放类.支持Mp3,wma,wmv
///</summary>
classMp3
...{
publicMp3()
...{
}
//定义API函数使用的字符串变量
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=260)]
privatestringName="";
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=128)]
privatestringdurLength="";
[MarshalAs(UnmanagedType.LPTStr,SizeConst=128)]
privatestringTemStr="";
intilong;
//定义播放状态枚举变量
publicenumState
...{
mPlaying=1,
mPuase=2,
mStop=3
};
//结构变量
publicstructstructMCI
...{
publicboolbMut;
publicintiDur;
publicintiPos;
publicintiVol;
publicintiBal;
publicstringiName;
publicStatestate;
};

publicstructMCImc=newstructMCI();

//取得播放文件属性
publicstringFileName
...{
get
...{
returnmc.iName;
}
set
...{
//ASCIIEncodingasc=newASCIIEncoding();
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)+"aliasmedia";
Name="open"+Convert.ToChar(34)+Name+Convert.ToChar(34)+"aliasmedia";
ilong=APIClass.mciSendString("closeall",TemStr,TemStr.Length,0);
ilong=APIClass.mciSendString(Name,TemStr,TemStr.Length,0);
ilong=APIClass.mciSendString("setmediatimeformatmilliseconds",TemStr,TemStr.Length,0);
mc.state=State.mStop;
}
catch
...{
MessageBox.Show("出错错误!");
}
}
}
//播放
publicvoidplay()
...{
TemStr="";
TemStr=TemStr.PadLeft(127,Convert.ToChar(""));
APIClass.mciSendString("playmedia",TemStr,TemStr.Length,0);
mc.state=State.mPlaying;
}
//停止
publicvoidStopT()
...{
TemStr="";
TemStr=TemStr.PadLeft(128,Convert.ToChar(""));
ilong=APIClass.mciSendString("closemedia",TemStr,128,0);
ilong=APIClass.mciSendString("closeall",TemStr,128,0);
mc.state=State.mStop;
}

publicvoidPuase()
...{
TemStr="";
TemStr=TemStr.PadLeft(128,Convert.ToChar(""));
ilong=APIClass.mciSendString("pausemedia",TemStr,TemStr.Length,0);
mc.state=State.mPuase;
}
privatestringGetCurrPath(stringname)
...{
if(name.Length<1)return"";
name=name.Trim();
name=name.Substring(0,name.Length-1);
returnname;
}
//总时间
publicintDuration
...{
get
...{
durLength="";
durLength=durLength.PadLeft(128,Convert.ToChar(""));
APIClass.mciSendString("statusmedialength",durLength,durLength.Length,0);
durLength=durLength.Trim();
if(durLength=="")return0;
return(int)(Convert.ToDouble(durLength)/1000f);
}
}

//当前时间
publicintCurrentPosition
...{
get
...{
durLength="";
durLength=durLength.PadLeft(128,Convert.ToChar(""));
APIClass.mciSendString("statusmediaposition",durLength,durLength.Length,0);
mc.iPos=(int)(Convert.ToDouble(durLength)/1000f);
returnmc.iPos;
}
}
}
}

　 public class APIClass
　 ... {
　　[DllImport("kernel32.dll",CharSet=CharSet.Auto)]
　　publicstaticexternintGetShortPathName(
　　　stringlpszLongPath,
　　　stringshortFile,
　　　intcchBuffer
　　);

　　[DllImport("winmm.dll",EntryPoint="mciSendString",CharSet=CharSet.Auto)]
　　publicstaticexternintmciSendString(
　　　stringlpstrCommand,
　　　stringlpstrReturnString,
　　　intuReturnLength,
　　　inthwndCallback
　　);
　}

代码下载: Mp3ForCSharp.zip

代码来源:http://myliulongtao.icode.youkuaiyun.com/post/2007/06/13/54135