C#调用API为什么不能正常播放声音文件

红帽小小 2008-04-02 03:01:59



using System;

using System.Collections;

using System.ComponentModel;

using System.Runtime.InteropServices;



namespace PlaySound

{

    internal class Helpers

    {

        [Flags]

        public enum PlaySoundFlags : int

        {

            SND_SYNC = 0x0000,    /*  play  synchronously  (default)  */  //同步  

            SND_ASYNC = 0x0001,    /*  play  asynchronously  */  //异步  

            SND_NODEFAULT = 0x0002,    /*  silence  (!default)  if  sound  not  found  */

            SND_MEMORY = 0x0004,    /*  pszSound  points  to  a  memory  file  */

            SND_LOOP = 0x0008,    /*  loop  the  sound  until  next  sndPlaySound  */

            SND_NOSTOP = 0x0010,    /*  don't  stop  any  currently  playing  sound  */

            SND_NOWAIT = 0x00002000,  /*  don't  wait  if  the  driver  is  busy  */

            SND_ALIAS = 0x00010000,  /*  name  is  a  registry  alias  */

            SND_ALIAS_ID = 0x00110000,  /*  alias  is  a  predefined  ID  */

            SND_FILENAME = 0x00020000,  /*  name  is  file  name  */

            SND_RESOURCE = 0x00040004    /*  name  is  resource  name  or  atom  */

        }



        [DllImport("Winmm")]

        public static extern bool PlaySound(string szSound, IntPtr hMod, PlaySoundFlags flags);

    }



    public class Sound

    {

        //播放

        public static void Play(string strFileName)

        {

            Helpers.PlaySound(strFileName, IntPtr.Zero, Helpers.PlaySoundFlags.SND_ASYNC);

        }



        //关闭

        public static void Stop()

        {

            Helpers.PlaySound(null, IntPtr.Zero, Helpers.PlaySoundFlags.SND_ASYNC);

        }

    }

}