Delen via


RateChangedRoutedEventHandler Delegate

Definition

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

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;
        }

Applies to