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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?

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1 回答 1

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在这种特殊情况下,我必须在撤消按钮上设置 Loaded 事件。然后在我的事件处理程序(代码隐藏)中,我这样做了((RadButton)e.Source).CommandTarget = Diagram;

于 2013-02-25T20:07:20.980 回答