using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.IO;
using System.Windows.Forms;
namespace Mp3Player
{
public class MciPlay
{
//定义API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;
//定义播放状态枚举常量
public enum State
{
mPlaying=1,
mPause=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();
public MciPlay()
{
//构造函数
}
//取得播放文件属性
public string FileName
{
get
{
return mc.iName;
}
set
{
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";
ilong = APIClass.mciSendString("stop media", TemStr, TemStr.Length, 0);
ilong = APIClass.mciSendString("close media", TemStr, TemStr.Length, 0);
MessageBox.Show(ilong.ToString());
Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media"; 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!");
}
}
}
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("stop media", TemStr, 128, 0);
ilong = APIClass.mciSendString("close media", 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.mPause;
}
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 == "\0")
{
return 0;
}
else
{
return (int)(Convert.ToDouble(durLength) / 1000);
}
}
} //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)/1000);
return mc.iPos;
}
}
//播放状态
public int Mp3State()
{
return ((int)mc.state);
}
}
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
);
}}
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- 像这样的两个函数,仅仅是一个函数参数的不同,就要写成两个函数,请高手赐教了,如何写成一个函数来代替。请看代码:
ilong = APIClass.mciSendString("close media", TemStr, 128, 0);
之后,还有再初始化什么的。
你都把 MEDIA释放了 那播放的时候要重新
Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media";
ilong = APIClass.mciSendString(Name, TemStr, TemStr.Length, 0);下面你可以参考下
http://blog.csdn.net/zgke/archive/2008/12/08/3476765.aspx