我真的坚持这一点。到目前为止,MSDN 论坛上没有人能够帮助我。
我有一个 MVVM 应用程序,一个经过编辑的 AppStudio 应用程序。我在应用程序上添加了播客功能。该功能非常有效,因为播客音频从不在后台播放。
我已在 MediaElement 上声明它是支持后台的媒体。这是我的观点的 XAML
<DataTemplate x:Key="PodCast1DetailDetail">
<ScrollViewer>
<StackPanel>
<TextBlock Margin="0,16" Text="{Binding Title, Converter={StaticResource TextPlainConverter}, ConverterParameter = 140}" Style="{StaticResource SubHeaderText}" />
<MediaElement x:Name="PodCast"
Source="{Binding Enclosure}"
PosterSource="{Binding PodcastImg}"
CurrentStateChanged="Media_CurrentStateChanged"
RateChanged="Media_RateChanged"
AreTransportControlsEnabled ="True"
AudioCategory="BackgroundCapableMedia"
Stretch="UniformToFill"
Width="340"
Height="auto"
MediaFailed="Media_MediaFailed"
MediaOpened="Media_MediaOpened"
MediaEnded="Media_MediaEnded"
AutoPlay="False"
HorizontalAlignment="Stretch"/>
<!--<Image Source="{Binding ImageUrl, Converter={StaticResource ThumbnailConverter}, ConverterParameter=300}" Stretch="Uniform" />-->
<TextBlock Margin="0,12" Style="{StaticResource ItemContentText}" Text="{Binding Content, Converter={StaticResource TextPlainConverter}}" />
<!--<controls:WebControl Html="{Binding Content}" Width="auto" Height="1000" Foreground="{StaticResource AppForegroundColor}" />-->
</StackPanel>
</ScrollViewer>
</DataTemplate>
这是详细信息页面上的 XAML:
<FlipView x:Name="FlipViewPodCast" Grid.Row="1" TabIndex="1"
DataContext="{Binding NextCastModel}"
ItemsSource="{Binding Items}"
ItemTemplate="{StaticResource NextCast1DetailDetail}"
SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
ItemContainerStyle="{StaticResource FlipItemStyle}">
</FlipView>
在详细页面后面的所有代码之后:
using System;
using System.Diagnostics;
using System.Threading;
using System.Net.NetworkInformation;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
using Windows.ApplicationModel.DataTransfer;
using Windows.Media;
using Windows.Media.Playback;
using Windows.UI.Core;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
using AppStudio.Services;
using AppStudio.ViewModels;
namespace AppStudio.Views
{
public sealed partial class PodCastDetail : Page
{
private NavigationHelper _navigationHelper;
private DataTransferManager _dataTransferManager;
public PodCastDetail()
{
this.InitializeComponent();
_navigationHelper = new NavigationHelper(this);
}
public PodCastViewModel PodCastModel { get; private set; }
public NavigationHelper NavigationHelper
{
get { return _navigationHelper; }
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
_dataTransferManager = DataTransferManager.GetForCurrentView();
_dataTransferManager.DataRequested += OnDataRequested;
_navigationHelper.OnNavigatedTo(e);
PodCastModel = NavigationServices.CurrentViewModel as PodCastViewModel;
if (PodCastModel != null)
{
PodCastModel.ViewType = ViewTypes.Detail;
}
DataContext = this;
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
_navigationHelper.OnNavigatedFrom(e);
_dataTransferManager.DataRequested -= OnDataRequested;
}
private void OnDataRequested(DataTransferManager sender, DataRequestedEventArgs args)
{
if (PodCastModel != null)
{
PodCastModel.GetShareContent(args.Request);
}
}
}
}
有人可以帮帮我吗?我真的坚持这一点。谢谢