我正在尝试从单独的窗口使用 RadDiagram 命令。我的绑定不起作用,因为“找不到与引用‘ElementName=Diagram’进行绑定的源”。我的(简化的)XAML 如下所示:
<UserControl x:Class="Client.Wpf.EditableLayoutControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
xmlns:s="clr-namespace:Client.Wpf" xmlns:Converters="clr-namespace:Client.Wpf.Converters"
mc:Ignorable="d" DataContext="{Binding RelativeSource={RelativeSource Self}}"
d:DesignHeight="300" d:DesignWidth="800" Background="Transparent" Name="Root">
<UserControl.Resources>
<Converters:MultiBoolToVisibilityConverter x:Key="multiBoolToVis"/>
<Converters:ObjectToBooleanConverter x:Key="objToBool"/>
<telerik:InvertedBooleanConverter x:Key="invBool"/>
</UserControl.Resources>
<telerik:RadDocking HasDocumentHost="False" BorderThickness="0" Name="DockingStation">
<telerik:RadSplitContainer>
<telerik:RadPaneGroup>
<telerik:RadPane CanDockInDocumentHost="False" Title="Controls" >
<telerik:RadPane.TitleTemplate>
<DataTemplate>
<Grid Margin="0 5">
<ContentPresenter Content="{Binding}" VerticalAlignment="Center"/>
<telerik:RadButton Command="telerik:DiagramCommands.Undo" CommandTarget="{Binding Path=Diagram, Source={RelativeSource FindAncestor, AncestorType={x:Type s:EditableLayoutControl}}}" />
</Grid>
</DataTemplate>
</telerik:RadPane.TitleTemplate>
<telerik:RadTabControl ...></telerik:RadTabControl>
</telerik:RadPane>
</telerik:RadPaneGroup>
</telerik:RadSplitContainer>
<telerik:RadSplitContainer>
<telerik:RadPaneGroup>
<telerik:RadPane PaneHeaderVisibility="Collapsed" HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch">
<Grid>
<telerik:RadDiagram Name="Diagram">...
</telerik:RadDiagram>
</Grid>
</telerik:RadPane>
</telerik:RadPaneGroup>
</telerik:RadSplitContainer>
</telerik:RadDocking>
</UserControl>
有问题的代码行是来自 DataTemplate 内部的这个美丽:
CommandTarget="{Binding Path=Diagram, Source={RelativeSource FindAncestor, AncestorType={x:Type s:EditableLayoutControl}}}"
那行代码不起作用,因为 Diagram 不是属性,并且绑定需要属性。使用 ElementName 而不是 Path 也不起作用,因为 ElementName 和 Source 是独占的。我也试过这个:
CommandTarget="{Binding ElementName=Diagram}"
那行代码不起作用。它给出了这个错误:
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'ElementName=Diagram'. BindingExpression:(no path); DataItem=null; target element is 'RadButton' (Name=''); target property is 'CommandTarget' (type 'IInputElement')
我也尝试过CommandTarget="{x:Reference Diagram}"
,但该功能显然尚未在 .NET 4.0 中实现。它是如何完成的?