玩在Silverlight中声音的MediaElement和微卡利

本文介绍了玩在Silverlight中声音的MediaElement和微卡利的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

如何播放使用微卡利在Silverlight中的MP3？

How can I play an MP3 in Silverlight using Caliburn Micro?

本的MediaElement的玩（）方法需要基于视图模型一个布尔变量来执行。

The MediaElement's "play()" method needs to be executed based on a boolean variable in the ViewModel.

在此先感谢！

推荐答案

使用的IResult。 样品code 编辑：基于一个布尔值，如果你描述的这个场景我可以改变样品

Use an IResult. sample code based on a Boolean value, if you describe the scenario of this I can alter the sample.

查看：

<Grid> <MediaElement AutoPlay="False" Source="../Assests/Kalimba.mp3"></MediaElement> <Button x:Name="Play" Content="Play" Height="50" Width="150" /> </Grid>

视图模型：

public class MediaViewModel : Screen { public MediaViewModel() { DisplayName = "Media Sample"; } public IEnumerable<IResult> Play() { var result = new PlayMediaResult(); yield return result; } }

PlayMediaResult：

PlayMediaResult:

public class PlayMediaResult : IResult { public void Execute(ActionExecutionContext context) { var view = context.View as FrameworkElement; var mediaElement = FindVisualChild<MediaElement>(view); if (mediaElement != null) { mediaElement.Play(); Completed(this, new ResultCompletionEventArgs {}); } Completed(this, new ResultCompletionEventArgs {}); } public event EventHandler<ResultCompletionEventArgs> Completed; public static TChildItem FindVisualChild<TChildItem>(DependencyObject obj) where TChildItem : DependencyObject { for (var i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++) { var child = VisualTreeHelper.GetChild(obj, i); if (child != null && child is TChildItem) return (TChildItem) child; var childOfChild = FindVisualChild<TChildItem>(child); if (childOfChild != null) return childOfChild; } return null; } } }