您好我有一个MediaElement
在DataTemplate
之内,但我无法从后面的代码访问它。下面如何从后台代码访问数据模板中的控件?
我张贴XAML代码:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="605*"/>
<ColumnDefinition Width="151*"/>
</Grid.ColumnDefinitions>
<GroupBox Header="My Videos" Height="177" VerticalAlignment="Top" Margin="5,320,5,0" Grid.ColumnSpan="2">
<ListBox x:Name="VideoList" ItemsSource="{Binding Videos }" Width="auto" Height=" auto" Margin="0,0,0,0" Grid.ColumnSpan="2" >
<DataTemplate x:Name="DTVideos">
<ListBoxItem Name="lbivid1" BorderThickness="2" Width="240" Selected="lbivid_Selected" >
<MediaElement Name="vidList" Height="150" Width="150" Source="{Binding SourceUri}" Position="00:00:05" LoadedBehavior="Pause" ScrubbingEnabled="True"/>
</ListBoxItem>
</DataTemplate>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" Margin="0,0,0,0"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ListBox>
</GroupBox>
<GroupBox Header="Preview" Height="320" Width="400" VerticalAlignment="Top" DockPanel.Dock="Left">
<MediaElement x:Name="videoPreview" HorizontalAlignment="Left" Height="300" VerticalAlignment="Top" Width="388"/>
</GroupBox>
后面的代码:
private void lbivid_Selected(object sender, RoutedEventArgs e)
{
imagePreview.Visibility = Visibility.Hidden;
string urlStr = (VidList.Source).ToString();
Uri temp = new Uri(UrlStr);
videoPreview.Source = temp;
}
能有人对你,请告诉我怎么能做到呢?
可能的重复http://stackoverflow.com/questions/8126700/how-do-i-access-an-element-of-a-control-template-from-within-code-behind –
重复[Access a在ContentPresenter的DataTemplate后面的代码中名为TextBox](http://stackoverflow.com/questions/1415771/access-a-named-textbox-in-the-code-behind-from-a-contentpresenters-datatemplate)..请看这个问题的答案。你也可以在[在CodeBehind的DataTemplate中访问XAML控件?](http://stackoverflow.com/questions/13166726/access-xaml-control-in-datatemplate-from-codebehind)文章中找到不同的答案。 – Sheridan
如何使用MVVM?获取并设置MediaElement的来源 – JSJ