Статья
11/17/2011

MediaElement.MarkerReached Event

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Occurs when a timeline marker is encountered during media playback.

Namespace: System.Windows.Controls
Assembly: System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public Event MarkerReached As TimelineMarkerRoutedEventHandler

public event TimelineMarkerRoutedEventHandler MarkerReached

<MediaElement MarkerReached="eventhandler"/>

Remarks

The MarkerReached event is not raised when the MediaElement seeks past a timeline marker. This event is raised whenever a marker associated with the media is reached. The marker might come from one of three locations:

Stored in the metadata of the currently opened media.
Associated with the currently opened media and coming from a separate stream.
Explicitly added to the Markers collection for the currently opened media, using script.

Examples

The following example creates a MediaElement object and responds to its MarkerReached event. Each time a timeline marker is reached, the example displays the timeline marker's Time, Type, and Text values.

    <Grid>
        <StackPanel>
            <TextBlock x:Name="timeTextBlock" FontSize="12">Time:</TextBlock>
            <TextBlock x:Name="typeTextBlock" FontSize="12">Type:</TextBlock>
            <TextBlock x:Name="valueTextBlock" FontSize="12">Value:</TextBlock>
            <Canvas>
              <MediaElement x:Name="media" Width="300" Height="200" 
               MarkerReached="OnMarkerReached" Source="thebutterflyandthebear.wmv"/>
            </Canvas>
        </StackPanel>
        

    </Grid>

        public void OnMarkerReached(object sender, TimelineMarkerRoutedEventArgs e)
        {

            timeTextBlock.Text = e.Marker.Time.Seconds.ToString();
            typeTextBlock.Text = e.Marker.Type.ToString();
            valueTextBlock.Text = e.Marker.Text;
  
        }

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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