Silverlight 5 dynamic stream URI setting

问题

I'm not familiar with Silverlight (5) but think I'm close to getting what I'm trying to do working. Grateful for any help.

Basically, I need to pass a dynamically generated smooth stream URI into the player and set "Media Source" correctly.

Steps I'm taking..

Client invocation, a single key-value pair..

<param name="InitParams" value="mediaurl=http://playready.directtaps.net/smoothstreaming/TTLSS720VC1/To_The_Limit_720.ism/Manifest" />

MainPage.xaml..

<!--Media:PlaylistItem DeliveryMethod="AdaptiveStreaming" MediaSource="mPlayer" /-->

App.xaml.cs

public Dictionary<string, string> PageData = new Dictionary<string, string>();
private void Application_Startup(object sender, StartupEventArgs e)
{
    var paramValues = e.InitParams;

    foreach (var param in paramValues)
    {
        this.PageData.Add(param.Key, param.Value);

    }

    this.RootVisual = new MainPage();

}

MainPage.xaml.cs..

public partial class MainPage : UserControl
{
    public MainPage()
    {
        InitializeComponent();

        App currentApp = (App)Application.Current;

        string uriString = currentApp.PageData["mediaurl"];

        MessageBox.Show(uriString);

        Microsoft.SilverlightMediaFramework.Core.Media.PlaylistItem item = new Microsoft.SilverlightMediaFramework.Core.Media.PlaylistItem();

        item.MediaSource = new Uri(uriString, UriKind.Absolute);

        item.DeliveryMethod =
          Microsoft.SilverlightMediaFramework.Plugins.Primitives.DeliveryMethods.AdaptiveStreaming;

        //Add PlaylistItem to the Media playlist
        Microsoft.SilverlightMediaFramework.Core.SMFPlayer SMFPlayer = new Microsoft.SilverlightMediaFramework.Core.SMFPlayer();

        SMFPlayer.Playlist.Add(item);

        SMFPlayer.Play();


    }
}

Visual Studio 2015 Compiler doesn't complain with MainPage.xaml.cs but it doesn't work. The Silverlight player plays static URIs fine, but not URIs passed in InitParam.

回答1:

You say that setting the url manually like this works...

<Media:PlaylistItem DeliveryMethod="AdaptiveStreaming" MediaSource="http://playready.directtaps.net/smoothstreaming/TTLSS720VC1/To_The_Limit_720.ism/Manifest" />

in that case then you need to update view so you can make control accessible by name from code behind (IDE).

<Media:PlaylistItem x:Name="playListItem" DeliveryMethod="AdaptiveStreaming"/>

and then in the code behind, reference that control

public partial class MainPage : UserControl
{
    public MainPage()
    {
        InitializeComponent();

        App currentApp = (App)Application.Current;

        string uriString = currentApp.PageData["mediaurl"];

        MessageBox.Show(uriString);

        //reference item by name
        Microsoft.SilverlightMediaFramework.Core.Media.PlaylistItem item = this.playListItem;

        item.MediaSource = new Uri(uriString, UriKind.Absolute);
        //...other code
    }
}

The other example from the link I sent you did it like this.

In MainPage.xaml

<Grid x:Name="LayoutRoot" Background="White" 
   xmlns:smf="http://schemas.microsoft.com/smf/2010/xaml/player">
    <smf:SMFPlayer HorizontalAlignment="Stretch" Margin="0" 
         x:Name="sMFPlayer" VerticalAlignment="Stretch" />
</Grid>

In MainPage.xaml.cs

using Microsoft.SilverlightMediaFramework.Core.Media;
using Microsoft.SilverlightMediaFramework.Plugins.Primitives;
//...
public partial class MainPage : UserControl
{
    public MainPage()
    {
        InitializeComponent();

        App currentApp = (App)Application.Current;

        string uriString = currentApp.PageData["mediaurl"];

        var item = new PlaylistItem();
        item.MediaSource = new Uri(uriString, UriKind.Absolute);
        item.DeliveryMethod = DeliveryMethods.AdaptiveStreaming;

        //Add PlaylistItem to the Media playlist
        sMFPlayer.Playlist.Add(item);
        sMFPlayer.Play();
    }
}

来源：https://stackoverflow.com/questions/36646767/silverlight-5-dynamic-stream-uri-setting

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silverlight