关于C#中音频播放API函数的问题！
- C# code
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.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 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); 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); 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 ); }
这是我在网上查到的一个音乐播放的类。API函数由于以前没接触过。还请高手具体分析一下这个函数。
还有，在用这个累的函数时只能播放一个文件，当再次改一个名字调用play时就不可以了。对此怎样改才能向平时的播放器一样，实现暂停和停止呢？？
坐等回答！！
[解决办法]
c#播放音频文件
首先将C:\WINDOWS\system32下的wmp.dll应用到项目中；
WMPLib.WindowsMediaPlayerClass player = new WMPLib.WindowsMediaPlayerClass();
player.URL = @"F:\ding.wav";
player.uiMode = "None";
player.settings.volume = 100;
player.settings.playCount = 1;
player.play();
WMPLib.WindowsMediaPlayer 的用法
属性/方法名： 说明：
[基本属性]
URL: String; 指定媒体位置，本机或网络地址
uiMode:String; 播放器界面模式，可为Full, Mini, None, Invisible
playState:integer; 播放状态，1=停止，2=暂停，3=播放，6=正在缓冲，9=正在连接，10=准备就绪
enableContextMenu:Boolean; 启用/禁用右键菜单
fullScreen:boolean; 是否全屏显示
[controls] wmp.controls //播放器基本控制
controls.play; 播放
controls.pause; 暂停
controls.stop; 停止
controls.currentPosition:double; 当前进度
controls.currentPositionString:string; 当前进度，字符串格式。如“00:23”
controls.fastForward; 快进
controls.fastReverse; 快退
controls.next; 下一曲
controls.previous; 上一曲
[settings] wmp.settings //播放器基本设置
settings.volume:integer; 音量，0-100
settings.autoStart:Boolean; 是否自动播放
settings.mute:Boolean; 是否静音
settings.playCount:integer; 播放次数
[currentMedia] wmp.currentMedia //当前媒体属性
currentMedia.duration:double; 媒体总长度
currentMedia.durationString:string; 媒体总长度，字符串格式。如“03:24”
currentMedia.getItemInfo(const string); 获取当前媒体信息"Title"=媒体标题，"Author"=艺术家，"Copyright"=版权信息，"Description"=媒体内容描述，"Duration"=持续时间（秒），"FileSize"=文件大小，"FileType"=文件类型，"sourceURL"=原始地址
currentMedia.setItemInfo(const string); 通过属性名设置媒体信息
currentMedia.name:string; 同 currentMedia.getItemInfo("Title")
[currentPlaylist] wmp.currentPlaylist //当前播放列表属性
currentPlaylist.count:integer; 当前播放列表所包含媒体数
currentPlaylist.Item[integer]; 获取或设置指定项目媒体信息，其子属性同wmp.currentMedia
循环播放：currentMedia.settings.setMode("loop", true);
取消循环：currentMedia.settings.setMode("loop", false);
[解决办法]
指示MCI命令执行结果，是一个错误代码，如果出错可以根据这个代码查询错误原因，