Hi,
I created this simple sample Form with
the close button.
Everything is working as expected when NOT using
the Interop.WMPLib.dll
I've seen other applications using this without problems but why isn't
the Form process closed when I just add
the line:
SoundPlayer myPlayer = new SoundPlayer();
and of course dispose it:
if (myPlayer != null)
{
myPlayer.Dispose();
myPlayer = null;
}
The Form closes but
the debugger VS2008 is still active.
The Form project and
the dll are still active.
If you send me an email to
[email protected], I can send you
the zipped project.
Below is
the class for
the dll:
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Runtime.InteropServices;
using WMPLib;
namespace WindowsMobile.Utilities
{
public delegate void SoundPlayerStateChanged(SoundPlayer sender, SoundPlayerState newState);
public enum SoundPlayerState
{
Stopped,
Playing,
Paused,
}
public class SoundPlayer : IDisposable
{
[DllImport("coredll")]
public extern static int waveOutSetVolume(int hwo, uint dwVolume);
[DllImport("coredll")]
public extern static int waveOutGetVolume(int hwo, out uint dwVolume);
WindowsMediaPlayer myPlayer = new WindowsMediaPlayer();
public SoundPlayer()
{
myPlayer.uiMode = "invisible";
myPlayer.settings.volume = 100;
}
string mySoundLocation = string.Empty;
public string SoundLocation
{
get { return mySoundLocation; }
set { mySoundLocation = value; }
}
public void Pause()
{
myPlayer.
controls.pause();
}
public void PlayLooping()
{
Stop();
myPlayer.URL = mySoundLocation;
myPlayer.settings.setMode("loop", true);
}
public int Volume
{
get { return myPlayer.settings.volume; }
set { myPlayer.settings.volume = value; }
}
public void Play()
{
Stop();
myPlayer.URL = mySoundLocation;
myPlayer.
controls.play();
}
public void Stop()
{
myPlayer.
controls.stop();
myPlayer.close();
}
#region IDisposable Members
public void Dispose()
{
try
{
Stop();
}
catch (Exception)
{
}
// need this otherwise
the process won't exit?!
try
{
int ret = Marshal.FinalReleaseComObject(myPlayer);
}
catch (Exception)
{
}
myPlayer = null;
GC.Collect();
}
#endregion
}
}
