C # play MP3 music files

Online collection and adjustment, passed the test.

Record

Using system; using system. runtime. interopservices; using system. text; using system. io; using system. windows. forms; namespace windowsapplication7 {/// <summary> /// Summary of clsmci. /// </Summary> public class clsmci {public clsmci () {// todo: here, add the constructor logic //} // defines the string variable [financialas (unmanagedtype. byvaltstr, sizeconst = 260)] private string name = ""; [financialas (unmanagedtype. byvaltstr, sizeconst = 128)] private string durlength = ""; [financialas (unmanagedtype. lptstr, sizeconst = 128)] private string temstr = ""; int ilong; // defines the playback status enumeration variable public Enum state {mplaying = 1, mpuase = 2, mstop = 3}; // Structure Variable public struct structmci {public bool bmut; Public int idur; Public int IPOs; Public int ivol; Public int ibal; Public String INAME; public state;}; Public structmci MC = new structmci (); // gets the playback File Attribute Public String filename {get {return MC. INAME;} set {// asciiencoding ASC = new asciiencoding (); try {temstr = ""; temstr = temstr. padleft (127, convert. tochar (""); name = ""; name = Name. padleft (260, convert. tochar (""); MC. INAME = value; ilong = apiclass. getmediapathname (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 {}}// play public void play () {temstr = ""; temstr = temstr. padleft (127, convert. tochar (""); apiclass. mcisendstring ("play media", temstr, temstr. length, 0); MC. state = state. mplaying;} 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); ilong = apiclass. mcisendstring (name, temstr, temstr. length, 0); // ilong = apiclass. mcisendstring ("set media time format milliseconds", temstr, temstr. length, 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;} // total time 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) ;}// current time public int currentposition {get {durlength = ""; durlength = durlength. padleft (128, convert. tochar (""); apiclass. mcisendstring ("status Media Position", durlength, durlength. length, 0); durlength = durlength. trim (); If (durlength = "") {return MC. IPOs = 0;} MC. IPOs = unchecked (INT) (convert. toint32 (durlength)/1000f); Return MC. IPOs ;}} public class apiclass {[dllimport ("kernel32.dll", charset = charset. auto)] public static extern int getaskpathname (string lpszlongpath, string delimiter file, int cchbuffer); [dllimport ("winmm. DLL ", entrypoint =" mcisendstring ", charset = charset. auto)] public static extern int mcisendstring (string lpstrcommand, string lpstrreturnstring, int ureturnlength, int hwndcallback );}}