我需要你的建议，请：）
我在FlipView中有一个绑定到title属性的文本框，它显示了页面的当前标题。
<TextBlock x:Name="jmeno" FontSize="26.667" FontWeight="Light" Text="{Binding Title}" TextWrapping="Wrap" />
我有一个显示视频的媒体元素。
<MediaElement x:Name="mmedia" Source="Video/prvniVideo.mp4" Height="300" Grid.Row="1" KeyUp="mmedia_KeyUp" />
我想在不同的页面上打开不同的视频，我试图像这样完成它 - 读取texblock的实际显示值，并根据该决定，在media元素中打开哪个视频。
像这样。
string AktualniStranka;
AktualniStranka = jmeno.Text;
if (AktualniStranka == "Exercise 1")
{
mmedia.Source = new Uri("ms-appx:/Video/prvniVideo.mp4", UriKind.RelativeOrAbsolute);
mmedia.Play();
}
else
{
mmedia.Source = new Uri("ms-appx:/Video/Gumm.mp4", UriKind.RelativeOrAbsolute);
mmedia.Play();
}
但它不起作用 - 我试图只阅读文本块的文本并将其放在另一个文本块中，它也不起作用，我花了差不多整整一天试图让它工作..请帮助伙计们：）
完整的XAML代码：
<common:LayoutAwarePage
x:Name="pageRoot"
x:Class="ContosoCookbook.ItemDetailPage"
DataContext="{Binding DefaultViewModel, RelativeSource={RelativeSource Self}}"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:ContosoCookbook"
xmlns:data="using:ContosoCookbook.Data"
xmlns:common="using:ContosoCookbook.Common"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Page.Resources>
<!-- Collection of items displayed by this page -->
<Style x:Name="transportStyle" TargetType="Button">
<Setter Property="Height" Value="40" />
<Setter Property="Width" Value="75" />
<Setter Property="FontSize" Value="11" />
</Style>
<CollectionViewSource
x:Name="itemsViewSource"
Source="{Binding Items}"
d:Source="{Binding AllGroups[0].Items, Source={d:DesignInstance Type=data:SampleDataSource, IsDesignTimeCreatable=True}}"/>
<common:ListConverter x:Key="ListConverter" />
<Style x:Key="BragAppBarButtonStyle" TargetType="Button" BasedOn="{StaticResource AppBarButtonStyle}">
<Setter Property="AutomationProperties.AutomationId" Value="BragAppBarButton"/>
<Setter Property="AutomationProperties.Name" Value="Brag"/>
<Setter Property="Content" Value=""/>
</Style>
<Style x:Key="ReminderAppBarButtonStyle" TargetType="Button" BasedOn="{StaticResource AppBarButtonStyle}">
<Setter Property="AutomationProperties.AutomationId" Value="ReminderAppBarButton"/>
<Setter Property="AutomationProperties.Name" Value="Reminder"/>
<Setter Property="Content" Value=""/>
</Style>
<local:ProductLicenseDataSource x:Key="License" />
<common:BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
</Page.Resources>
<Page.BottomAppBar>
<AppBar x:Name="PageAppBar" Padding="10,0,10,0">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="50*"/>
<ColumnDefinition Width="50*"/>
</Grid.ColumnDefinitions>
<StackPanel x:Name="LeftCommands" Orientation="Horizontal" Grid.Column="0" HorizontalAlignment="Left">
<Button x:Name="BragButton" HorizontalAlignment="Left" Style="{StaticResource BragAppBarButtonStyle}" Click="OnBragButtonClicked" />
<Button x:Name="PinRecipeButton" HorizontalAlignment="Left" Style="{StaticResource PinAppBarButtonStyle}" Click="OnPinRecipeButtonClicked" />
<Button x:Name="ReminderButton" HorizontalAlignment="Left" Style="{StaticResource ReminderAppBarButtonStyle}" Click="OnReminderButtonClicked" />
</StackPanel>
<StackPanel x:Name="RightCommands" Orientation="Horizontal" Grid.Column="1" HorizontalAlignment="Right">
</StackPanel>
</Grid>
</AppBar>
</Page.BottomAppBar>
<!--
This grid acts as a root panel for the page that defines two rows:
* Row 0 contains the back button and page title
* Row 1 contains the rest of the page layout
-->
<Grid
Style="{StaticResource LayoutRootStyle}"
DataContext="{Binding Group}"
d:DataContext="{Binding AllGroups[0], Source={d:DesignInstance Type=data:SampleDataSource, IsDesignTimeCreatable=True}}">
<Grid.RowDefinitions>
<RowDefinition Height="140"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!--
The remainder of the page is one large FlipView that displays details for
one item at a time, allowing the user to flip through all items in the chosen
group
-->
<FlipView
x:Name="flipView"
AutomationProperties.AutomationId="ItemsFlipView"
AutomationProperties.Name="Item Details"
TabIndex="1"
Grid.RowSpan="2"
ItemsSource="{Binding Source={StaticResource itemsViewSource}}">
<FlipView.ItemContainerStyle>
<Style TargetType="FlipViewItem">
<Setter Property="Margin" Value="0,137,0,0"/>
</Style>
</FlipView.ItemContainerStyle>
<FlipView.ItemTemplate>
<DataTemplate>
<UserControl Loaded="StartLayoutUpdates" Unloaded="StopLayoutUpdates">
<ScrollViewer x:Name="scrollViewer" Style="{StaticResource VerticalScrollViewerStyle}" Grid.Row="1">
<!-- Three-column grid for item-detail layout -->
<Grid Margin="120,0,20,20">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="600" />
<ColumnDefinition Width="40" />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<StackPanel Orientation="Vertical" Grid.Column="0">
<TextBlock x:Name="jmeno" FontSize="26.667" FontWeight="Light" Text="{Binding Title}" TextWrapping="Wrap" />
</StackPanel>
<StackPanel Orientation="Vertical" Grid.Column="4">
<TextBlock FontSize="26.667" FontWeight="Light" Text="Description" Margin="0,0,0,16"/>
<TextBlock FontSize="26.667" FontWeight="Light" Text="{Binding ShortDesctiption}" TextWrapping="Wrap"/>
<ScrollViewer Style="{StaticResource VerticalScrollViewerStyle}">
<Grid>
<TextBlock FontSize="20" FontWeight="Light" Text="{Binding Directions}" TextWrapping="Wrap" Visibility="{Binding IsLicensed, Source={StaticResource License}, Converter={StaticResource BooleanToVisibilityConverter }}" />
<Button Width="225" Height="120" Background="#30ffffff" Click="OnPurchaseProduct" Visibility="{Binding IsTrial, Source={StaticResource License}, Converter={StaticResource BooleanToVisibilityConverter }}">
<Button.Content>
<TextBlock Text="{Binding FormattedPrice, Source={StaticResource License}}" TextWrapping="Wrap" TextAlignment="Center" />
</Button.Content>
</Button>
</Grid>
</ScrollViewer>
</StackPanel>
</Grid>
<VisualStateManager.VisualStateGroups>
<!-- Visual states reflect the app's view state inside the FlipView -->
<VisualStateGroup x:Name="ApplicationViewStates">
<VisualState x:Name="FullScreenLandscape"/>
<VisualState x:Name="Filled"/>
<!-- Respect the narrower 100-pixel margin convention for portrait -->
<VisualState x:Name="FullScreenPortrait">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="image" Storyboard.TargetProperty="MaxHeight">
<DiscreteObjectKeyFrame KeyTime="0" Value="400"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<!-- When snapped, the content is reformatted and scrolls vertically -->
<VisualState x:Name="Snapped">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="scrollViewer" Storyboard.TargetProperty="Style">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource VerticalScrollViewerStyle}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="image" Storyboard.TargetProperty="MaxHeight">
<DiscreteObjectKeyFrame KeyTime="0" Value="160"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</ScrollViewer>
</UserControl>
</DataTemplate>
</FlipView.ItemTemplate>
</FlipView>
<!-- MEDIA PANEL-->
<StackPanel Orientation="Vertical" Grid.Row="1" >
<Border BorderThickness="5" BorderBrush="White" Background="Black" HorizontalAlignment="Left" Margin="165,50,0,0" VerticalAlignment="Top">
<ContentControl x:Name="VideoContainer" Height="300" KeyUp="VideoContainer_KeyUp" >
<MediaElement x:Name="mmedia" Source="Video/prvniVideo.mp4" Height="300" Grid.Row="1" KeyUp="mmedia_KeyUp" />
</ContentControl>
</Border>
<StackPanel Orientation="Horizontal" Margin="140,20,0,0">
<Button Name="btnPlay" Click="btnPlay_Click"
Style="{StaticResource transportStyle}" Content="Play" />
<Button Name="btnPause" Click="btnPause_Click"
Style="{StaticResource transportStyle}" Content="Pause" />
<Button Name="btnStop" Click="btnStop_Click"
Style="{StaticResource transportStyle}" Content="Stop" />
<Button Name="btnReverse" Click="btnReverse_Click"
Style="{StaticResource transportStyle}" Content="Rewind" />
<Button Name="btnForward" Click="btnForward_Click"
Style="{StaticResource transportStyle}" Content="Forward" />
<Button Name="btnVolumeUp" Click="btnVolumeUp_Click"
Style="{StaticResource transportStyle}" Content="-" />
<Button Name="btnVolumeDown" Click="btnVolumeDown_Click"
Style="{StaticResource transportStyle}" Content="+" />
<Button Name="btnMute" Click="btnMute_Click"
Style="{StaticResource transportStyle}" Content="Mute" />
</StackPanel>
<Button x:Name="btnFullScreenToggle" Click="btnFullScreenToggle_Click"
Style="{StaticResource transportStyle}" Content="Full Screen ON" Margin="290,0,0,0" Width="302" />
<TextBlock x:Name="poser" FontSize="26.667" FontWeight="Light" Text="poser" TextWrapping="Wrap" />
</StackPanel>
<!-- FlipView used in portrait mode -->
<FlipView
x:Name="portraitFlipView"
AutomationProperties.AutomationId="ItemsFlipView"
AutomationProperties.Name="Item Details"
Grid.Row="1"
Margin="0,-3,20,0"
ItemsSource="{Binding Source={StaticResource itemsViewSource}}"
Visibility="Collapsed">
<FlipView.ItemTemplate>
<DataTemplate>
<UserControl Loaded="StartLayoutUpdates" Unloaded="StopLayoutUpdates">
<ScrollViewer x:Name="scrollViewer" Style="{StaticResource VerticalScrollViewerStyle}" Grid.Row="1">
<!-- Vertical StackPanel for item-detail layout -->
<StackPanel Orientation="Vertical" Margin="100,0,20,0">
<StackPanel Orientation="Vertical">
<TextBlock FontSize="26.667" FontWeight="Light" Text="{Binding Title}" TextWrapping="Wrap"/>
<Image x:Name="image" Width="400" Margin="0,20,0,40" Stretch="Uniform" Source="{Binding Image}" HorizontalAlignment="Left"/>
</StackPanel>
<StackPanel Orientation="Vertical">
<TextBlock FontSize="26.667" FontWeight="Light" Text="Ingredients" Margin="0,0,0,16"/>
<TextBlock FontSize="20" FontWeight="Light" LineHeight="32.5" Text="{Binding Ingredients, Converter={StaticResource ListConverter}}" TextWrapping="Wrap" />
</StackPanel>
<StackPanel Orientation="Vertical">
<TextBlock FontSize="26.667" FontWeight="Light" Text="Directions" Margin="0,24,0,16"/>
<ScrollViewer Style="{StaticResource VerticalScrollViewerStyle}">
<Grid>
<TextBlock FontSize="20" FontWeight="Light" Text="{Binding Directions}" TextWrapping="Wrap" Visibility="{Binding IsLicensed, Source={StaticResource License}, Converter={StaticResource BooleanToVisibilityConverter }}" />
<Button Width="225" Height="120" Background="#30ffffff" Click="OnPurchaseProduct" Visibility="{Binding IsTrial, Source={StaticResource License}, Converter={StaticResource BooleanToVisibilityConverter }}">
<Button.Content>
<TextBlock Text="{Binding FormattedPrice, Source={StaticResource License}}" TextWrapping="Wrap" TextAlignment="Center" />
</Button.Content>
</Button>
</Grid>
</ScrollViewer>
</StackPanel>
</StackPanel>
</ScrollViewer>
</UserControl>
</DataTemplate>
</FlipView.ItemTemplate>
</FlipView>
<FlipView
x:Name="snappedFlipView"
AutomationProperties.AutomationId="ItemsFlipView"
AutomationProperties.Name="Item Details"
Grid.Row="1"
Margin="0,-3,0,0"
ItemsSource="{Binding Source={StaticResource itemsViewSource}}"
Visibility="Collapsed">
<FlipView.ItemTemplate>
<DataTemplate>
<UserControl Loaded="StartLayoutUpdates" Unloaded="StopLayoutUpdates">
<ScrollViewer x:Name="scrollViewer" Style="{StaticResource VerticalScrollViewerStyle}" Grid.Row="1">
<!-- Vertical StackPanel for item-detail layout -->
<StackPanel Orientation="Vertical" Margin="20,0,20,0">
<StackPanel Orientation="Vertical">
<TextBlock FontSize="20" FontWeight="Light" Text="{Binding Title}" TextWrapping="Wrap"/>
<Image x:Name="image" Width="260" Margin="0,12,0,40" Stretch="Uniform" Source="{Binding Image}" HorizontalAlignment="Left"/>
</StackPanel>
<StackPanel Orientation="Vertical">
<TextBlock FontSize="20" FontWeight="Light" Text="Ingredients" Margin="0,0,0,16"/>
<TextBlock FontSize="16" FontWeight="Light" TextWrapping="Wrap" Text="{Binding Ingredients, Converter={StaticResource ListConverter}}" />
</StackPanel>
</StackPanel>
</ScrollViewer>
</UserControl>
</DataTemplate>
</FlipView.ItemTemplate>
</FlipView>
<!-- Back button and page title -->
<Grid HorizontalAlignment="Left" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button x:Name="backButton" Click="GoBack" IsEnabled="{Binding Frame.CanGoBack, ElementName=pageRoot}" Style="{StaticResource BackButtonStyle}"/>
<TextBlock x:Name="pageTitle" Text="{Binding Title}" Style="{StaticResource PageHeaderTextStyle}" Grid.Column="1" IsHitTestVisible="false"/>
<Button Name="btnFullScreenOff" Click="btnFullScreenToggle_Click"
Style="{StaticResource transportStyle}" Content="Full Screen OFF" HorizontalAlignment="Right" Grid.Column="1" Margin="0,56,495,36" RenderTransformOrigin="-9.161,0.266" Height="48" Width="106" Visibility="Collapsed" />
</Grid>
<VisualStateManager.VisualStateGroups>
<!-- Visual states reflect the application's view state -->
<VisualStateGroup x:Name="ApplicationViewStates">
<VisualState x:Name="FullScreenLandscape"/>
<VisualState x:Name="Filled"/>
<!-- The back button respects the narrower 100-pixel margin convention for portrait -->
<VisualState x:Name="FullScreenPortrait">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PortraitBackButtonStyle}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="flipView" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="portraitFlipView" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<!-- The back button and title have different styles when snapped -->
<VisualState x:Name="Snapped">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedBackButtonStyle}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="pageTitle" Storyboard.TargetProperty="Style">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedPageHeaderTextStyle}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="flipView" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="snappedFlipView" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
完整的C＃代码：
答案 0 :(得分：0)
我看到你试图从你的Textblock（jmeno）的名字中获取显示的值，对吗？
你不应该这样做。您的文本块在datatemplate中定义，为其指定名称的唯一原因是应用故事板。
你应该做的是获取Flipview的SelectedItem对象（这是你的可视元素datacontext），并获取该数据对象的Title属性。
所以：
（flipView.SelectedItem as -WhateverYourTypeIs - ）。标题，你应该有你的价值。