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Adding RadMediaPlayer events programmatically
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Michael Draisey
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Michael Draisey asked on 29 Apr 2009, 11:54 AM
Hi,

I'm creating my player programmatically and having problems getting at events due to this. Do you have an examples of programmatically creating a player and then registering events. Also a list of events and signatures would be great! I'm using vb.net but c# examples would be fine.

Thanks,

Michael

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Miroslav
Telerik team
answered on 29 Apr 2009, 01:53 PM
Hi Michael,

Strangely, all our examples have the MediaPlayer defined in Xaml, but it should make no difference how  you create it.

Here are the MediaPlayer specific events and how you register for them in C#:
using System.Windows;  
using System.Windows.Controls;  
using Telerik.Windows;  
using Telerik.Windows.Controls;  
 
namespace RoutedEventsSilverlight  
{  
    public partial class Page : UserControl  
    {  
        public Page()  
        {  
            InitializeComponent();  
 
            RadMediaPlayer mediaPlayer = new RadMediaPlayer();  
 
            //CLR Events, use them when you have access to the MP instance.  
            mediaPlayer.Loaded += new System.Windows.RoutedEventHandler(mediaPlayer_Loaded);  
            mediaPlayer.ChapterReached += new System.EventHandler<RadRoutedEventArgs>(mediaPlayer_ChapterReached);  
            mediaPlayer.CurrentStateChanged += new System.EventHandler<RadRoutedEventArgs>(mediaPlayer_CurrentStateChanged);  
            mediaPlayer.DownloadProgressChanged += new System.EventHandler<RadRoutedEventArgs>(mediaPlayer_DownloadProgressChanged);  
            mediaPlayer.MediaEnded += new System.EventHandler<RadRoutedEventArgs>(mediaPlayer_MediaEnded);  
            mediaPlayer.MediaOpened += new System.EventHandler<RadRoutedEventArgs>(mediaPlayer_MediaOpened);  
 
            //Roued events, can be used when the player is created as a part of a template or   
            //is otherwise inaccessible:  
            this.AddHandler(RadMediaPlayer.ChapterReachedEvent, new RoutedEventHandler(mediaPlayer_ChapterReached));  
            this.AddHandler(RadMediaPlayer.CurrentStateChangedEvent, new RoutedEventHandler(mediaPlayer_CurrentStateChanged));  
            this.AddHandler(RadMediaPlayer.DownloadProgressChangedEvent, new RoutedEventHandler(mediaPlayer_DownloadProgressChanged));  
            this.AddHandler(RadMediaPlayer.MediaEndedEvent, new RoutedEventHandler(mediaPlayer_MediaEnded));  
            this.AddHandler(RadMediaPlayer.MediaOpenedEvent, new RoutedEventHandler(mediaPlayer_MediaOpened));  
 
            //Add the MP to the visual tree:  
            LayoutRoot.Children.Add(mediaPlayer);  
        }  
 
        void mediaPlayer_MediaOpened(object sender, RoutedEventArgs e)  
        {  
        }  
 
        void mediaPlayer_MediaEnded(object sender, RoutedEventArgs e)  
        {  
        }  
 
        void mediaPlayer_DownloadProgressChanged(object sender, RoutedEventArgs e)  
        {  
        }  
 
        void mediaPlayer_CurrentStateChanged(object sender, RoutedEventArgs e)  
        {  
        }  
 
        void mediaPlayer_ChapterReached(object sender, RoutedEventArgs e)  
        {  
        }  
 
        void mediaPlayer_Loaded(object sender, System.Windows.RoutedEventArgs e)  
        {  
        }  
    }  
}  
 

And in VB:

Imports System.Windows   
Imports System.Windows.Controls   
Imports Telerik.Windows   
Imports Telerik.Windows.Controls   
 
Namespace RoutedEventsSilverlight   
    Public Partial Class Page   
        Inherits UserControl   
        Public Sub New()   
            InitializeComponent()   
              
            Dim mediaPlayer As New RadMediaPlayer()   
              
            'CLR Events, use them when you have access to the MP instance.   
            AddHandler mediaPlayer.Loaded, AddressOf mediaPlayer_Loaded   
            AddHandler mediaPlayer.ChapterReached, AddressOf mediaPlayer_ChapterReached   
            AddHandler mediaPlayer.CurrentStateChanged, AddressOf mediaPlayer_CurrentStateChanged   
            AddHandler mediaPlayer.DownloadProgressChanged, AddressOf mediaPlayer_DownloadProgressChanged   
            AddHandler mediaPlayer.MediaEnded, AddressOf mediaPlayer_MediaEnded   
            AddHandler mediaPlayer.MediaOpened, AddressOf mediaPlayer_MediaOpened   
              
            'Roued events, can be used when the player is created as a part of a template or   
            'is otherwise inaccessible:   
            Me.[AddHandler](RadMediaPlayer.ChapterReachedEvent, New RoutedEventHandler(mediaPlayer_ChapterReached))   
            Me.[AddHandler](RadMediaPlayer.CurrentStateChangedEvent, New RoutedEventHandler(mediaPlayer_CurrentStateChanged))   
            Me.[AddHandler](RadMediaPlayer.DownloadProgressChangedEvent, New RoutedEventHandler(mediaPlayer_DownloadProgressChanged))   
            Me.[AddHandler](RadMediaPlayer.MediaEndedEvent, New RoutedEventHandler(mediaPlayer_MediaEnded))   
            Me.[AddHandler](RadMediaPlayer.MediaOpenedEvent, New RoutedEventHandler(mediaPlayer_MediaOpened))   
              
            'Add the MP to the visual tree:   
            LayoutRoot.Children.Add(mediaPlayer)   
        End Sub   
          
        Private Sub mediaPlayer_MediaOpened(ByVal sender As ObjectByVal e As RoutedEventArgs)   
        End Sub   
          
        Private Sub mediaPlayer_MediaEnded(ByVal sender As ObjectByVal e As RoutedEventArgs)   
        End Sub   
          
        Private Sub mediaPlayer_DownloadProgressChanged(ByVal sender As ObjectByVal e As RoutedEventArgs)   
        End Sub   
          
        Private Sub mediaPlayer_CurrentStateChanged(ByVal sender As ObjectByVal e As RoutedEventArgs)   
        End Sub   
          
        Private Sub mediaPlayer_ChapterReached(ByVal sender As ObjectByVal e As RoutedEventArgs)   
        End Sub   
          
        Private Sub mediaPlayer_Loaded(ByVal sender As ObjectByVal e As System.Windows.RoutedEventArgs)   
        End Sub   
    End Class   
End Namespace  

Hopefully this is what you need,

All the best,
Miroslav
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Michael Draisey
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answered on 29 Apr 2009, 02:24 PM
Hi Miroslav,

That's great thanks. What i'm trying to achive is to have the 'Previous' and 'Next' buttons move the position of the video move by 10 second each way. The events that i need to attach to therefore are the Next and Previous buttons. What are the events for these buttons?

Thanks for the code, really helpful. I did try defining the RadMediaPlayer in XAML but i got validation errors, even for a basic declaration.

Thanks,

Michael
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Miroslav
Telerik team
answered on 01 May 2009, 11:29 AM
Hi Michael,

Sorry for the delayed reply!

Can you share more details on the error you get when you try to define the MediaPlayer in Xaml? Is this in some kind of View which is loaded dynamically? Can you send us a sample Xaml that crashed for you? I am asking for all this because the MediaPlayer should just work when defined in xaml.

Unfortunately there are no events that you can handle to implement the skip-forward and skip-backward feature. Currently the buttons will only go to the previous and next chapters. Even if you were able to get to the Click events on the buttons, they would still switch the chapters.

As a workaround I can suggest to add chapters to the MediaItems.

We are planning to add commands to the MediaPlayer that will let you customize the behavior of the buttons, but unfortunately I do not know when they will be implemented.

Greetings,
Miroslav
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Michael Draisey
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Michael Draisey
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