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MediaPlayer

This is a migrated thread and some comments may be shown as answers.

Bader asked on 23 Nov 2010, 05:02 PM

Hello,

I have a problem with using telerik silverlight controls, for example the media player control.
This is the first time I use telerik silverlight controls, so please guide me step by step.
My code is based on following telerik demo http://demos.telerik.com/silverlight/#MediaPlayer/SmoothStreaming (First Look)

My MainPage.xaml:

<UserControl x:Class="SimpleMediaPlayer.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.MediaPlayer"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">

<Grid x:Name="LayoutRoot">

<telerik:RadMediaPlayer x:Name="player" VerticalContentAlignment="Top"

HorizontalContentAlignment="Center"

Header="{Binding RelativeSource={RelativeSource Self}, Path=MediaElement}"

SelectedIndex="0" >

<telerik:RadMediaPlayer.HeaderTemplate>

<DataTemplate>

<Border CornerRadius="3" Background="White" Padding="15 5" Margin="0 10 0 0">

<StackPanel>

<StackPanel Orientation="Horizontal" Margin="4">

<TextBlock Text="Bitrate: " Foreground="Black" />

<TextBlock Text="{Binding ., StringFormat=n0}" Foreground="Black" />

</StackPanel>

</Border>

</DataTemplate>

</telerik:RadMediaPlayer.HeaderTemplate>

<telerik:RadMediaItem IsStreamingSource="True" Header="Big Buck Bunny"

Source="http://video3.smoothhd.com.edgesuite.net/ondemand/Big Buck Bunny Adaptive.ism/Manifest"

StreamAttached="RadMediaItem_StreamAttached">

<telerik:RadMediaChapter Content="Chapter 1" Position="00:00:50" />

<telerik:RadMediaChapter Content="Chapter 2" Position="00:03:00" />

</telerik:RadMediaItem>

</telerik:RadMediaPlayer>

</Grid>

     <telerikQuickStart:QuickStart.ConfigurationPanel>

        <StackPanel Margin="3">

            <Button x:Name="FullScreenButton" Height="22" Click="FullScreenButton_Click"

                    Content="Toggle Full Screen" Margin="0,4,0,0" />

            <Button x:Name="PlayListButton" Height="22" Click="PlayListButton_Click"

                    Content="Toggle Play List" Margin="0,4,0,0" />

        </StackPanel>

    </telerikQuickStart:QuickStart.ConfigurationPanel>

</UserControl>

My MainPage.xaml.cs:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

using Microsoft.Expression.Encoder.AdaptiveStreaming;

using Telerik.Windows.Controls;

namespace SimpleMediaPlayer

{

public partial class MainPage : System.Windows.Controls.UserControl

{

public MainPage()

{

InitializeComponent();

}

private void RadMediaItem_StreamAttached(object sender, EventArgs e)

{

RadMediaItem item = sender as RadMediaItem;

if (item != null)

{

AdaptiveStreamingSource adaptiveSource = new AdaptiveStreamingSource();

adaptiveSource.MediaElement = this.player.MediaElement;

adaptiveSource.ManifestUrl = item.Source;

adaptiveSource.PlayBitrateChange += adaptiveSource_PlayBitrateChange;

adaptiveSource.StartPlayback();

}

void adaptiveSource_PlayBitrateChange(object sender, BitrateChangedEventArgs e)

{

this.player.Header = e.Bitrate;

}

private void FullScreenButton_Click(object sender, System.Windows.RoutedEventArgs e)

{

this.player.IsFullScreen = !this.player.IsFullScreen;

}

private void PlayListButton_Click(object sender, System.Windows.RoutedEventArgs e)

{

this.player.IsPlaylistVisible = !this.player.IsPlaylistVisible;

}

I the Design view I recieve the following error message:

System.Reflection.TargetInvocationException

Exception has been thrown by the target of an invocation.

at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)

at System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)

at System.Delegate.DynamicInvokeImpl(Object[] args)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

System.InvalidOperationException

An unhandled exception was encountered while trying to render the current silverlight project on the design surface. To diagnose this failure, please try to run the project in a regular browser using the silverlight developer runtime.

at Microsoft.Windows.Design.Platform.SilverlightViewProducer.OnUnhandledException(Object sender, ViewUnhandledExceptionEventArgs e)

at Microsoft.Windows.Design.Platform.SilverlightViewProducer.SilverlightContentHost.MeasureOverride(Size availableSize)

at System.Windows.FrameworkElement.MeasureCore(Size availableSize)