WPF路由命令，每个表具有绑定 [英] WPF Routed Command with Bindings per-Tab

问题描述

我打算禁用和启用TabControl外部的按钮，就像更改当前选项卡时TabItem内部的按钮一样.但是TabItem的CommandBindings似乎并没有影响向上"可视化树.正确的方法是什么 ?

I intended to disable and enable the Buttons outside the TabControl, just like those inside the TabItem when the current tab is changed. But the CommandBindings of the TabItem do not seem to impact "up" the visual tree. What is the right way to do this?

使用此XAML:

<Window x:Class="WpfApplication10.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfApplication10"
    Title="MainWindow" Height="350" Width="525">
<StackPanel>
    <Button Content="MyCommand1" Command="local:MainWindow.MyCommand1" />
    <Button Content="MyCommand2" Command="local:MainWindow.MyCommand2" />
    <TabControl>
        <TabItem Header="tabItem1" Name="tabItem1">
            <TabItem.CommandBindings>
                <CommandBinding Command="local:MainWindow.MyCommand1" 
                                Executed="ExecuteMyCommand" />
            </TabItem.CommandBindings>
            <StackPanel>
                <Button Content="MyCommand1" Command="local:MainWindow.MyCommand1" />
                <Button Content="MyCommand2" Command="local:MainWindow.MyCommand2" />
            </StackPanel>
        </TabItem>
        <TabItem Header="tabItem2" Name="tabItem2">
            <TabItem.CommandBindings>
                <CommandBinding Command="local:MainWindow.MyCommand2" 
                                Executed="ExecuteMyCommand"/>
            </TabItem.CommandBindings>
            <StackPanel>
                <Button Content="MyCommand1" Command="local:MainWindow.MyCommand1" />
                <Button Content="MyCommand2" Command="local:MainWindow.MyCommand2" />
            </StackPanel>
        </TabItem>
    </TabControl>
</StackPanel>
</Window>

隐藏此代码:

    public static readonly RoutedUICommand MyCommand1 = new RoutedUICommand();
    public static readonly RoutedUICommand MyCommand2 = new RoutedUICommand();
    public MainWindow()
    {
        InitializeComponent();
    }
    private void ExecuteMyCommand(object sender, ExecutedRoutedEventArgs e)
    {
        MessageBox.Show("Hello");
    }

推荐答案

MSFT在他们的WPF论坛中给了我正确答案，在这里(

MSFT gave me the correct answer in their WPF forum, here (http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/bb3d1eb1-96fa-4fbc-beda-799613acb9f7)

<StackPanel>
     <StackPanel FocusManager.IsFocusScope="True">
         <Button Content="MyCommand1" Command="local:Window8.MyCommand1" />
         <Button Content="MyCommand2" Command="local:Window8.MyCommand2" />
     </StackPanel>
     <TabControl>
         <TabItem Header="tabItem1" Name="tabItem1">
             <TabItem.CommandBindings>
                 <CommandBinding Command="local:Window8.MyCommand1" Executed="ExecuteMyCommand" />
             </TabItem.CommandBindings>
             <StackPanel>
                 <Button Content="MyCommand1" Command="local:Window8.MyCommand1" />
                 <Button Content="MyCommand2" Command="local:Window8.MyCommand2" />
             </StackPanel>
         </TabItem>
         <TabItem Header="tabItem2" Name="tabItem2">
             <TabItem.CommandBindings>
                 <CommandBinding Command="local:Window8.MyCommand2" Executed="ExecuteMyCommand"/>
             </TabItem.CommandBindings>
             <StackPanel>
                 <Button Content="MyCommand1" Command="local:Window8.MyCommand1" />
                 <Button Content="MyCommand2" Command="local:Window8.MyCommand2" />
             </StackPanel>
         </TabItem>
     </TabControl>
</StackPanel>

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