Creating the Windows Media Player Control Programmatically
When you add the Windows Media Player control to a form from the Toolbox, an object of the class AxWMPLib.AxWindowsMediaPlayer is created. This wrapper class gives the Player all the functionality of an ActiveX control, including access to UI properties such as Location and Size.
If you do not require the properties exposed by AxWindowsMediaPlayer, or if your application does not have a graphical user interface, you can create a Player control programmatically. In this case, you create an object of the WMPLib.WindowsMediaPlayer class.
Note Because the WindowsMediaPlayer object is not wrapped as an ActiveX control, it does not have any properties inherited from System.Windows.Forms.Control. As a result, the Controls property is not renamed to CtlControls, as it is in AxWindowsMediaPlayer.
To create the Windows Media Player control programmatically, you must first add a reference to wmp.dll, which is found in the \Windows\system32 folder. Adding this reference creates WMPLib.dll in your project folder, and a reference to WMPLib appears in Solution Explorer.
The following example code, part of a Form1 class, shows how to create a Player object and play a file. When playback ends, or if the file cannot be played, the form is closed.
' [ Visual Basic ]
Dim WithEvents Player As WMPLib.WindowsMediaPlayer
Private Sub PlayFile(ByVal url As String)
Player = New WMPLib.WindowsMediaPlayer
Player.URL = url
Player.controls.play()
End Sub
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles MyBase.Load
' TODO Insert a valid path in the line below.
PlayFile("c:\media\myaudio.wma")
End Sub
Private Sub Player_MediaError(ByVal pMediaObject As Object) _
Handles Player.MediaError
MessageBox.Show("Cannot play media file.")
Me.Close()
End Sub
Private Sub Player_PlayStateChange(ByVal NewState As Integer) _
Handles Player.PlayStateChange
If NewState = WMPLib.WMPPlayState.wmppsStopped Then
Me.Close()
End If
End Sub
// [ C# ]
WMPLib.WindowsMediaPlayer Player;
private void PlayFile(String url)
{
Player = new WMPLib.WindowsMediaPlayer();
Player.PlayStateChange +=
new WMPLib._WMPOCXEvents_PlayStateChangeEventHandler(Player_PlayStateChange);
Player.MediaError +=
new WMPLib._WMPOCXEvents_MediaErrorEventHandler(Player_MediaError);
Player.URL = url;
Player.controls.play();
}
private void Form1_Load(object sender, System.EventArgs e)
{
// TODO Insert a valid path in the line below.
PlayFile(@"c:\myaudio.wma");
}
private void Player_PlayStateChange(int NewState)
{
if ((WMPLib.WMPPlayState)NewState == WMPLib.WMPPlayState.wmppsStopped)
{
this.Close();
}
}
private void Player_MediaError(object pMediaObject)
{
MessageBox.Show("Cannot play media file.");
this.Close();
}
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Build date: 2/15/2012
Hi guys,
When you get time, you might want to change the method from:
private void Player_PlayStateChange(int NewState) <--Um, no.
{
if ((WMPLib.WMPPlayState)NewState == WMPLib.WMPPlayState.wmppsStopped)
{
this.Close();
}
}
TO:
void axWMPlayer_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e) // yes!
{
if ((WMPLib.WMPPlayState)e.newState == WMPLib.WMPPlayState.wmppsStopped)
{
this.Close();
}
}
Cheers,
-Mike
- 3/19/2012
- Reddgum
- 11/2/2011
- NaxxSystems - Peter S
