relativesource

来源： https://stackoverflow.com/questions/26223601/relativesource-binding-not-resolving

来源： https://stackoverflow.com/questions/26223601/relativesource-binding-not-resolving

问题 have you ever have a problem like this: System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.UserControl', AncestorLevel='1''. BindingExpression:Path=DataContext; DataItem=null; target element is 'ContextMenu' (Name=''); target property is 'DataContext' (type 'Object') Code: <ContextMenu DataContext="{Binding Path=DataContext, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . Will there be RelativeSource FindAncestor, AncestorType... in Silverlight 4? 回答1: In Silverlight 4 the RelativeSource property of Binding still only supports "Self" and "TemplatedParent", there is no change from

问题 My target is to bind the Content -Property of the Label to the Tag -Property of the Elements the Style is applied to . But my solution doesn't seem to work: My style: <Style TargetType="TextBox" x:Key="HintedTextBox"> <Style.Resources> <VisualBrush AlignmentX="Left" AlignmentY="Center" Stretch="None" x:Key="HintedTextBox_Hint"> <VisualBrush.Visual> <Label Content="{Binding RelativeSource={RelativeSource Self}, Path=Tag}" Foreground="LightGray" /> </VisualBrush.Visual> </VisualBrush> </Style

问题 I have a DataSet bound to the Window.DataContext ; I also have a DataGrid : <DataGrid ItemsSource={Binding Tables[Items]}> <DataGrid.Columns> <DataGridTextBoxColumn Header={Binding Path=DataContext.Tables[Names]/Test, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}} /> </DataGrid.Columns> </DataGrid> Basically, I'm trying to bind the Header of that column to DataTable "Names", Column "Test", first row. However, I can't get it right. Note that I can bind it fine

问题 Using the default style <Style TargetType="{x:Type TabItem}"x:Key="HeaderStyleS"> <Setter Property="Header" Value="{Binding RelativeSource={RelativeSource Self}, Path=Content.DataContext.ViewName}" /> </Style> It works. But in my case I need to custom the TabItem So I used <Style TargetType="{x:Type TabItem}" x:Key="HeaderStyle"> <Setter Property="FocusVisualStyle" Value="{x:Null}"/> <Setter Property="Background" Value="Transparent"/> <Setter Property="Template"> <Setter.Value>

问题 First the code: <ListView ItemsSource="{Binding DataTransferModel.Output}" Background="Transparent" Margin="0" VerticalContentAlignment="Top" AlternationCount="2" Name="lvOutput" ScrollViewer.VerticalScrollBarVisibility="Auto" Grid.Row="2"> <ListView.ItemTemplate> <DataTemplate> <StackPanel Orientation="Horizontal" Margin="0,1"> <UserControls:OutputTextBox Text="{Binding Data, Mode=OneWay}" IsReadOnly="True" Grid.Row="2" TextWrapping="WrapWithOverflow" SelectedValue="{Binding Path=DataContext

问题 What I want to do is bind the text of a TextBlock to my custom ButtonSymbol property of the UserControl. Here is the XAML for the UserControl. The Binding part for the TextBlock needs to be filled in. <UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class=

问题 I created a ControlTemplate for my custom control MyControl . MyControl derives from System.Windows.Controls.Control and defines the following property public ObservableCollection<MyControl> Children{ get; protected set; } . To display the nested child controls I am using an ItemsControl ( StackPanel ) which is surrounded by a GroupBox . If there are no child controls, I want to hide the GroupBox . Everything works fine on application startup: The group box and child controls are shown if the