C#中用API实现MP3等音频文件的播放类
具体源码如下：
本文引用地址：http://www.eepw.com.cn/article/166946.htm一、使用API函数mciSendString构成的媒体播放类。
using System;
using System.Runtime.InteropServices;
using System.Text;
using System.IO ;
namespace clsMCIPlay
{
///
/// clsMci 的摘要说明。
///
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(Unmana
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.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
{
MessageBox.Show(出错错误!);
}
}
}
//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
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