[Csharp] Play Audio use winmm.dll

Today, I really early go to my company. It's a nice day.

In this post, I want show you a class C# to play audio use API winmm.dll, here is code snippet:

   1:      public class AudioPlayHelper

   2:      {

   3:          [DllImport("winmm.dll")]

   4:          private static extern long mciSendString(

   5:              string strCommand, StringBuilder strReturn, int iReturnLength, IntPtr hwndCallback);

   6:   

   7:          #region Play Audio

   8:   

   9:          public static void Play(string fileName, bool repeat)

  10:          {

  11:              mciSendString("open \"" + fileName + "\" type mpegvideo alias MediaFile",

  12:                          null, 0, IntPtr.Zero);

  13:   

  14:              mciSendString("play MediaFile" + (repeat ? " repeat" : String.Empty), null,

  15:                            0, IntPtr.Zero);

  16:          }

  17:   

  18:          public static void Play(byte[] embeddedResource, bool repeat)

  19:          {

  20:              ExtractResource(embeddedResource, Path.GetTempPath() + "resource.tmp");

  21:              mciSendString("open \"" + Path.GetTempPath() + "resource.tmp" +

  22:                            "\" type mpegvideo alias MediaFile", null, 0, IntPtr.Zero);

  23:              mciSendString("play MediaFile" + (repeat ? " repeat" : String.Empty),

  24:                            null, 0, IntPtr.Zero);

  25:          }

  26:   

  27:          public static void Pause()

  28:          {

  29:              mciSendString("stop MediaFile", null, 0, IntPtr.Zero);

  30:          }

  31:   

  32:          public static void Stop()

  33:          {

  34:              mciSendString("close MediaFile", null, 0, IntPtr.Zero);

  35:          }

  36:   

  37:          private static void ExtractResource(IEnumerable<byte> res, string filePath)

  38:          {

  39:              if (File.Exists(filePath)) return;

  40:   

  41:              var fs = new FileStream(filePath, FileMode.OpenOrCreate);

  42:              var bw = new BinaryWriter(fs);

  43:   

  44:              foreach (var b in res) bw.Write(b);

  45:   

  46:              bw.Close();

  47:              fs.Close();

  48:          }

  49:   

  50:          #endregion

  51:   

  52:          #region Record

  53:   

  54:          public static void Record()

  55:          {

  56:              mciSendString("open new type waveaudio alias MediaFile", null, 0, IntPtr.Zero);//cannot record mp3

  57:              mciSendString("record MediaFile", null, 0, IntPtr.Zero);

  58:          }

  59:   

  60:          public static void Save(string fileName)

  61:          {

  62:              mciSendString("save MediaFile \"" + fileName + "\"", null, 0, IntPtr.Zero); //extension .wav

  63:              mciSendString("close MediaFile ", null, 0, IntPtr.Zero);

  64:          }

  65:   

  66:          #endregion

  67:      }

Before add this code you need using System.Runtime.InteropServices;
This application will be play mp3 sound and record wav sound by easy call static function.
Hope you enjoy it!