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我有以下创建 TabControl 的代码。每个选项卡都包含一个显示不同数据的用户控件（代码如下）（一个显示地方税务信息，另一个显示联邦/州税务信息）。

选项卡控件 

    <TabControl 
        Name="MappingTabs"
        Margin="6,7,7,8" Padding="6"
        Background="White" >
        <TabItem
            Name="LocalTaxTab"
            Padding="6,1"
            Header="Local">
            <AdornerDecorator>
                <DockPanel>
                    <Border Margin="7">
                        <GroupBox 
                            Name="LocalTaxesGroup">
                            <GroupBox.Header>
                                <TextBlock 
                                    FontWeight="Bold" 
                                    Text="Local Taxes">
                                </TextBlock>
                            </GroupBox.Header>
                            <StackPanel Margin="20,8,10,0"
                                        Orientation="Vertical">

                                <local:TaxCodeMappingHeader />

                                <!-- Note that a row is 25 high, -->
                                <ScrollViewer
                                        MaxHeight="250"
                                        >
                                    <ItemsControl  
                                            Name="LocalTaxCodeMappingControl"
                                            ItemTemplate="{StaticResource MappingRuleTemplate}" 
                                            BorderThickness="0" 
                                            AlternationCount="2" 
                                            IsTextSearchEnabled="False"
                                            HorizontalContentAlignment="Stretch"
                                            ItemsSource="{Binding TaxCodesCollection[0].CodeCollection, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}">
                                        <!--  ItemsSource="{Binding Source={StaticResource sortedCodeCollection}}">    -->
                                    </ItemsControl>
                                </ScrollViewer>

                                <local:TaxCodeMappingFooter DataContext="{Binding RelativeSource={RelativeSource AncestorType=UserControl}}"/>

                            </StackPanel>
                        </GroupBox>
                    </Border>
                </DockPanel>
            </AdornerDecorator>
        </TabItem>
        <TabItem
            Name="FedStateTaxesTab"
            Padding="6,1"
            Header="Federal\State">
            <AdornerDecorator>
                <DockPanel>
                    <Border Margin="7">
                        <GroupBox 
                            Name="FedStateTaxesGroup">
                            <GroupBox.Header>
                                <TextBlock 
                                    FontWeight="Bold" 
                                    Text="Federal \ State Taxes">
                                </TextBlock>
                            </GroupBox.Header>
                            <StackPanel Margin="20,8,10,0"
                                        Orientation="Vertical">

                                <local:TaxCodeMappingHeader />

                                <!-- Note that a row is 25 high, -->
                                <ScrollViewer
                                        MaxHeight="250"
                                        >
                                    <ItemsControl  
                                            Name="FedStateTaxCodeMappingControl"
                                            ItemTemplate="{StaticResource MappingRuleTemplate}" 
                                            BorderThickness="0" 
                                            AlternationCount="2" 
                                            IsTextSearchEnabled="False"
                                            HorizontalContentAlignment="Stretch"
                                            ItemsSource="{Binding TaxCodesCollection[1].CodeCollection, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}">
                                        <!--  ItemsSource="{Binding Source={StaticResource sortedCodeCollection}}">    -->
                                    </ItemsControl>
                                </ScrollViewer>

                                <local:TaxCodeMappingFooter DataContext="{Binding RelativeSource={RelativeSource AncestorType=UserControl}}"/>

                            </StackPanel>
                        </GroupBox>
                    </Border>
                </DockPanel>
            </AdornerDecorator>
        </TabItem>
    </TabControl>
</StackPanel>

用户控件(TaxCodeMappingFooter)

   <Button 
        Name="AddButton"
        Grid.Row="0"
        Grid.Column="0"
        Height="20" Width="20"
        Command="{Binding Path=DataContext.AddClickCommand}"
        CommandParameter="(want the tab name here)"
        Style="{StaticResource ImageButton}"
        ToolTip="Add a rule"
        local:AttachedImage.Image="{StaticResource AddImageSource}" />

UserControl (TaxCodeMappingFooter) 包含一个添加按钮，我需要通过 RelayCommand 将其连接到 VM。我需要以某种方式告诉 VM 哪个选项卡正在调用 Add 命令，以便可以将项目添加到正确的集合中。我考虑过发送 TabName，然后关闭它以了解用户在哪个选项卡上。

我的想法是正确的还是更好的方法？如果正确，我如何获取 TabName 值以将其作为 CommandParameter 传回？

4

2 回答 2

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如果您要像以前那样对 UI 控件进行硬编码，那么您最简单的选择可能是string DependencyProperty在TaxCodeMappingFooter控件中定义 a：

public static readonly DependencyProperty TabNameProperty = DependencyProperty.
    Register("TabName", typeof(string), typeof(TaxCodeMappingFooter));

public string TabName
{
    get { return (string)GetTabName(TabNameProperty); }
    set { SetTabName(TabNameProperty, value); }
}

然后你可以从你TabItem的 s 中设置它：

<local:TaxCodeMappingFooter TabName="FedStateTaxesTab" DataContext="{Binding 
    RelativeSource={RelativeSource AncestorType=UserControl}}" />

并Bind从您的控制范围内对其：

<Button Name="AddButton" Command="{Binding Path=DataContext.AddClickCommand}" 
    CommandParameter="{Binding TabName, RelativeSource={RelativeSource 
    AncestorType=TaxCodeMappingFooter}}" ... />
于 2013-11-18T14:27:55.970 回答
0

正如其他人所说，如果您对视图模型结构进行适当的建模，这将不是什么大问题。

如果你真的想绑定一个祖先元素，你可以使用 a RelativeSourceof FindAncestor，然后指定AncestorType. 请注意，AncestorLevel如果您是多个TabItem.

{Binding Path=Name
         RelativeSource={RelativeSource Mode=FindAncestor,
                                        AncestorType={x:Type TabItem}}}

（为清楚起见添加了包装）

于 2013-11-18T14:31:27.463 回答