RateChangedRoutedEventHandler Delegate

Definition

Namespace:

Windows.UI.Xaml.Media

Represents the method that will handle the RateChanged event. This event fires when PlaybackRate or DefaultPlaybackRate change either via user interaction or from code.

public delegate void RateChangedRoutedEventHandler(Platform::Object ^ sender, RateChangedRoutedEventArgs ^ e);

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.Guid(149529175, 44549, 18587, 136, 57, 40, 198, 34, 93, 35, 73)]
class RateChangedRoutedEventHandler : MulticastDelegate

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.Guid(149529175, 44549, 18587, 136, 57, 40, 198, 34, 93, 35, 73)]
public delegate void RateChangedRoutedEventHandler(object sender, RateChangedRoutedEventArgs e);

Public Delegate Sub RateChangedRoutedEventHandler(sender As Object, e As RateChangedRoutedEventArgs)

Parameters

sender

Object

Platform::Object

IInspectable

The object where the handler is attached.

e

RateChangedRoutedEventArgs

The event data.

Attributes

ContractVersionAttribute GuidAttribute

Windows requirements

Device family	Windows 10 (introduced in 10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (introduced in v1.0)

Examples

This example uses C# code-behind to add a handler to a MediaElement named "myMediaElement" defined in XAML (not shown). The handler gets the PlaybackRate from the MediaElement. That information could be presented in UI as a number, or could be part of logic that displays different UI for normal playback or accelerated/slowed playback. Note that the current rate is obtainable from the MediaElement event source, it isn't carried in the event data.

Note

myMediaElement_RateChanged is raised when either the PlaybackRate or the DefaultPlaybackRate changes, so it is possible that myMediaElement.PlaybackRate queried below is unchanged from previous value.

public MainPage()
        {
            this.InitializeComponent();
            myMediaElement.RateChanged += myMediaElement_RateChanged;
        }

        void myMediaElement_RateChanged(object sender, RateChangedRoutedEventArgs e)
        {
            Double CurrentPlayBackRate = myMediaElement.PlaybackRate;
        }