如何在UWP中的Pivot中获取Pivot.ItemTemplate内的控件？(How to get controls inside Pivot.ItemTemplate in Pivot in UWP?)
我有以下代码：
<ScrollViewer x:Name="swipeBetweenPages" Grid.Row="1"> <Pivot DataContext="{StaticResource ViewModel}" x:Name="pivot" Margin="0,-45,0,0" HeaderTemplate="{StaticResource headerTest}" ItemTemplate="{StaticResource pivotTemplate}" ItemsSource="{Binding Articles}" SelectionChanged="pivot_SelectionChanged"> </Pivot> </ScrollViewer> <Page.Resources> <ViewModels:ArticleViewModel x:Key="ViewModel" /> <DataTemplate x:Key="headerTest"> </DataTemplate> <DataTemplate x:Key="pivotTemplate"> <StackPanel Margin="-15 0 -15 0"> <Grid> <Grid.Background> <ImageBrush AlignmentX="Center" AlignmentY="Center" ImageSource="Assets/PlaceHolder.jpg"></ImageBrush> </Grid.Background> <Image q42controls:ImageExtensions.CacheUri="{Binding ImageURL}" Tag="{Binding ImageURL}" Tapped="ImageView"></Image> </Grid> <StackPanel Background="White"> <TextBlock x:Name="HeadLine" Text="{Binding HeadLine}" Margin="10 5 0 -5" TextWrapping="Wrap" FontSize="20" Foreground="Black" FontFamily="{StaticResource HeadlineCommonFamiy}" Pivot.SlideInAnimationGroup="GroupTwo" Height="63" FontWeight="Bold" TextTrimming="CharacterEllipsis"/> <TextBlock Text="{Binding Abstract}" TextWrapping="Wrap" FontSize="15" FontStyle="Italic" Pivot.SlideInAnimationGroup="GroupTwo" Margin="10 5 0 10" FontFamily="{StaticResource AbstractCommonFamily}"/> </StackPanel> <StackPanel x:Name="descriptionSP" Background="White"> <RichTextBlock IsTextSelectionEnabled="False" x:Name="richTextBlock" local:Properties.Html="{Binding ArticleDetail}" TextWrapping="Wrap" Pivot.SlideInAnimationGroup="GroupTwo" Margin="10 5 0 10" FontFamily="{StaticResource ContentControlThemeFontFamily}"> </RichTextBlock> </StackPanel> </StackPanel> </DataTemplate> </Page.Resources>如何在stackpanel中获取RichTextBlock控件？
现在，我正在使用C＃end中的以下代码：
private T FindElementInVisualTree<T>(DependencyObject parentElement) where T : DependencyObject { var count = VisualTreeHelper.GetChildrenCount(parentElement); if (count == 0) return null; for (int i = 0; i < count; i++) { var child = VisualTreeHelper.GetChild(parentElement, i); if (child != null && child is T) return (T)child; else { var result = FindElementInVisualTree<T>(child); if (result != null) return result; } } return null; } RichTextBlock richTextBlock = new RichTextBlock(); StackPanel rootStackPanel = new StackPanel(); StackPanel childStackPanel = new StackPanel(); PivotItem item = (sender as Pivot).ContainerFromItem((sender as Pivot).SelectedItem) as PivotItem; rootStackPanel = item.ContentTemplate.LoadContent() as StackPanel; childStackPanel = rootStackPanel.FindName("descriptionSP") as StackPanel; richTextBlock = rootStackPanel.FindName("richTextBlock") as RichTextBlock; Paragraph paragraph = new Paragraph(); Run run = new Run(); // Customize some properties on the RichTextBlock. richTextBlock.IsTextSelectionEnabled = true; richTextBlock.SelectionHighlightColor = new SolidColorBrush(Windows.UI.Colors.Pink); richTextBlock.Foreground = new SolidColorBrush(Windows.UI.Colors.Blue); richTextBlock.FontWeight = Windows.UI.Text.FontWeights.Light; richTextBlock.FontFamily = new FontFamily("Arial"); richTextBlock.FontStyle = Windows.UI.Text.FontStyle.Italic; richTextBlock.FontSize = 50; //run.Text = "This is some sample text to demonstrate some properties."; //Add the Run to the Paragraph, the Paragraph to the RichTextBlock. paragraph.Inlines.Add(run); richTextBlock.Blocks.Add(paragraph); // Add the RichTextBlock to the visual tree (assumes stackPanel is decalred in XAML). //childStackPanel.Children.Add(richTextBlock); //rootStackPanel.Children.Add(richTextBlock);但我无法获得RichTextBlock控件。 我得到一个null值。 请帮帮我。 谢谢。
I have the following code:
<ScrollViewer x:Name="swipeBetweenPages" Grid.Row="1"> <Pivot DataContext="{StaticResource ViewModel}" x:Name="pivot" Margin="0,-45,0,0" HeaderTemplate="{StaticResource headerTest}" ItemTemplate="{StaticResource pivotTemplate}" ItemsSource="{Binding Articles}" SelectionChanged="pivot_SelectionChanged"> </Pivot> </ScrollViewer> <Page.Resources> <ViewModels:ArticleViewModel x:Key="ViewModel" /> <DataTemplate x:Key="headerTest"> </DataTemplate> <DataTemplate x:Key="pivotTemplate"> <StackPanel Margin="-15 0 -15 0"> <Grid> <Grid.Background> <ImageBrush AlignmentX="Center" AlignmentY="Center" ImageSource="Assets/PlaceHolder.jpg"></ImageBrush> </Grid.Background> <Image q42controls:ImageExtensions.CacheUri="{Binding ImageURL}" Tag="{Binding ImageURL}" Tapped="ImageView"></Image> </Grid> <StackPanel Background="White"> <TextBlock x:Name="HeadLine" Text="{Binding HeadLine}" Margin="10 5 0 -5" TextWrapping="Wrap" FontSize="20" Foreground="Black" FontFamily="{StaticResource HeadlineCommonFamiy}" Pivot.SlideInAnimationGroup="GroupTwo" Height="63" FontWeight="Bold" TextTrimming="CharacterEllipsis"/> <TextBlock Text="{Binding Abstract}" TextWrapping="Wrap" FontSize="15" FontStyle="Italic" Pivot.SlideInAnimationGroup="GroupTwo" Margin="10 5 0 10" FontFamily="{StaticResource AbstractCommonFamily}"/> </StackPanel> <StackPanel x:Name="descriptionSP" Background="White"> <RichTextBlock IsTextSelectionEnabled="False" x:Name="richTextBlock" local:Properties.Html="{Binding ArticleDetail}" TextWrapping="Wrap" Pivot.SlideInAnimationGroup="GroupTwo" Margin="10 5 0 10" FontFamily="{StaticResource ContentControlThemeFontFamily}"> </RichTextBlock> </StackPanel> </StackPanel> </DataTemplate> </Page.Resources>How to get the RichTextBlock control inside the stackpanel?
Now, I am trying with the following code in the C# end:
private T FindElementInVisualTree<T>(DependencyObject parentElement) where T : DependencyObject { var count = VisualTreeHelper.GetChildrenCount(parentElement); if (count == 0) return null; for (int i = 0; i < count; i++) { var child = VisualTreeHelper.GetChild(parentElement, i); if (child != null && child is T) return (T)child; else { var result = FindElementInVisualTree<T>(child); if (result != null) return result; } } return null; } RichTextBlock richTextBlock = new RichTextBlock(); StackPanel rootStackPanel = new StackPanel(); StackPanel childStackPanel = new StackPanel(); PivotItem item = (sender as Pivot).ContainerFromItem((sender as Pivot).SelectedItem) as PivotItem; rootStackPanel = item.ContentTemplate.LoadContent() as StackPanel; childStackPanel = rootStackPanel.FindName("descriptionSP") as StackPanel; richTextBlock = rootStackPanel.FindName("richTextBlock") as RichTextBlock; Paragraph paragraph = new Paragraph(); Run run = new Run(); // Customize some properties on the RichTextBlock. richTextBlock.IsTextSelectionEnabled = true; richTextBlock.SelectionHighlightColor = new SolidColorBrush(Windows.UI.Colors.Pink); richTextBlock.Foreground = new SolidColorBrush(Windows.UI.Colors.Blue); richTextBlock.FontWeight = Windows.UI.Text.FontWeights.Light; richTextBlock.FontFamily = new FontFamily("Arial"); richTextBlock.FontStyle = Windows.UI.Text.FontStyle.Italic; richTextBlock.FontSize = 50; //run.Text = "This is some sample text to demonstrate some properties."; //Add the Run to the Paragraph, the Paragraph to the RichTextBlock. paragraph.Inlines.Add(run); richTextBlock.Blocks.Add(paragraph); // Add the RichTextBlock to the visual tree (assumes stackPanel is decalred in XAML). //childStackPanel.Children.Add(richTextBlock); //rootStackPanel.Children.Add(richTextBlock);But I am not able to get the control RichTextBlock. I am getting a null value. Please help me. Thanks.
最满意答案
您可以使用PivotItem ContentTemplate来获取PivotItem的模板，例如：
PivotItem item = (sender as Pivot).ContainerFromItem((sender as Pivot).SelectedItem) as PivotItem; var rootStackPanel = item.ContentTemplate.LoadContent() as StackPanel; var richtb = rootStackPanel.FindName("richtb") as RichTextBlock;我首先给RichTextBlock命名为“richtb”。
You can use ContentTemplate of PivotItem to get the template of PivotItem for example like this:
PivotItem item = (sender as Pivot).ContainerFromItem((sender as Pivot).SelectedItem) as PivotItem; var rootStackPanel = item.ContentTemplate.LoadContent() as StackPanel; var richtb = rootStackPanel.FindName("richtb") as RichTextBlock;And I firstly gave a name to the RichTextBlock as "richtb".
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