使用API函數(shù)mciSendString構成的媒體播放類

使用API函數(shù)mciSendString構成的媒體播放類.txt我自橫刀向天笑，笑完我就去睡覺。你的手機比話費還便宜。路漫漫其修遠兮，不如我們打的吧。/**C#沒有提供播放MP3等音頻文件的類，*要編寫播放MP3等音頻文件程序，*必須使用第三方控件或類。*本文使用API函數(shù)mciSendString，*編寫一個播放MP3等音頻文件的類。*/usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Runtime.InteropServices;namespace使用API函數(shù)mciSendString構成的媒體播放類{publicpartialclassForm1:Form{stringpath;publicForm1(){InitializeComponent();}clsMCImci=null;privatevoidbutton1_Click(objectsender,EventArgse){mci=newclsMCI();mci.FileName=path;gressBar1.Maximum=mci.Duration;mci.play();this.timer1.Enabled=true;}privatevoidbutton2_Click(objectsender,EventArgse){if(mci==null){}else{this.timer1.Enabled=false;mci.StopT();}}privatevoidbutton3_Click(objectsender,EventArgse){OpenFileDialogop=newOpenFileDialog();if(op.ShowDialog()==DialogResult.OK){path=op.FileName;}}privatevoidForm1_Load(objectsender,EventArgse){}privatevoidtimer1_Tick(objectsender,EventArgse){gressBar1.Value=mci.CurrentPosition;if(mci.CurrentPosition==mci.Duration){this.timer1.Enabled=false;}}}publicclassclsMCI{publicclsMCI(){////TODO:在此處添加構造函數(shù)邏輯//}//定義API函數(shù)使用的字符串變量[MarshalAs(UnmanagedType.ByValTStr,SizeConst=260)]privatestringName="";}///<summary>//////</summary>publicvoidPuase(){TemStr="";TemStr=TemStr.PadLeft(128,Convert.ToChar(""));ilong=APIClass.mciSendString("pausemedia",TemStr,TemStr.Length,0);mc.state=State.mPuase;}///<summary>//////</summary>///<paramname="name"></param>///<returns></returns>privatestringGetCurrPath(stringname){if(name.Length<1)return"";name=name.Trim();name=name.Substring(0,name.Length-1);returnname;}///<summary>///總時間///</summary>publicintDuration{get{durLength="";durLength=durLength.PadLeft(128,Convert.ToChar(""));APIClass.mciSendString("statusmedialength",durLength,durLength.Length,0);durLength=durLength.Trim();if(durLength=="")return0;durLength=durLength.Substring(0,durLength.IndexOf('\0'));return(int)(Convert.ToDouble(durLength)/1000f);}}///<summary>///當前時間///</summary>publicintCurrentPosition{get{durLength="";durLength=durLength.PadLeft(128,Convert.ToChar(""));APIClass.mciSendString("statusmediaposition",durLength,durLength.Length,0);durLength=durLength.Substring(0,durLength.IndexOf('\0'));mc.iPos=(int)(Convert.ToDouble(durLength)/1000f);returnmc.iPos;}}}publicclassAPIClass{[DllImport("kernel32.dll",CharSet=CharSet.Auto)]publicstaticexternintGetShortPathName(stringlpszLongPath,stringshortFile,intcchBuffer);[DllImport("winmm.dll",EntryPoint="mciSend