WPF CommandBinding爲應用程序菜單與手勢

我有一個示例WPF應用程序，我試圖讓KeyGestures工作的應用程序級菜單。這是工作正常，如果我有我的應用程序菜單在MainWindow中。WPF CommandBinding爲應用程序菜單與手勢

這是我窗口的XAML

<Window x:Class="SampleWpfApp.Window2" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:local="clr-namespace:SampleWpfApp" 
    Name="RootWindow" 
    Title="Window2" Height="600" Width="800"> 
<!--<Window.InputBindings> 
    <KeyBinding Gesture="CTRL+N" Command="{Binding ApplicationCommands.New}" /> 
    <KeyBinding Gesture="CTRL+F1" Command="{x:Static local:Window2.ShowHelp}" /> 
</Window.InputBindings> 
<Window.CommandBindings> 
    <CommandBinding Command="ApplicationCommands.New" 
       Executed="NewExecuted" 
       CanExecute="NewCanExecute"/> 
    <CommandBinding x:Name="HelpCmdBinding" CanExecute="AltHelpCanExecute" Executed="AltHelpExecuted" Command="{x:Static local:Window2.ShowHelp}" /> 
</Window.CommandBindings>--> 
<DockPanel> 
    <!--<Menu DockPanel.Dock="Top"> 
     <MenuItem Header="_File"> 
      <MenuItem Header="_New" InputGestureText="Ctrl+N" Command="{Binding ApplicationCommands.New}" /> 
      <MenuItem Header="E_xit" InputGestureText="Alt+F4" /> 
     </MenuItem> 
     <MenuItem Header="_Help"> 
      <MenuItem Header="_View Help" InputGestureText="Ctrl+F1" Command="{x:Static local:Window2.ShowHelp}" /> 
      <MenuItem Header="_About" /> 
     </MenuItem> 
    </Menu>--> 
    <local:TopMenu DockPanel.Dock="Top" /> 
    <ContentControl> 

    </ContentControl> 
</DockPanel>

在上面的代碼，所有的評論都是我的第一次嘗試，工作正常。

當我將菜單移至TopMenu控件時，出現問題。手勢不會觸發呼叫。

這是我的代碼背後。

/// <summary> 
/// Interaction logic for TopMenu.xaml 
/// </summary> 
public partial class TopMenu : UserControl 
{ 
    public static RoutedCommand ShowHelp = new RoutedCommand("AltHelp", typeof(TopMenu)); 

    public TopMenu() 
    { 
     InitializeComponent(); 
    } 


    void NewExecuted(object target, ExecutedRoutedEventArgs e) 
    { 
     MessageBox.Show("The " + ((RoutedCommand)e.Command).Name + " command invoked on " + ((FrameworkElement)target).Name); 
    } 
    void NewCanExecute(object sender, CanExecuteRoutedEventArgs e) 
    { 
     e.CanExecute = true; 
    } 

    void AltHelpExecuted(object target, ExecutedRoutedEventArgs e) 
    { 
     MessageBox.Show("The " + ((RoutedCommand)e.Command).Name + " command invoked on " + ((FrameworkElement)target).Name); 
    } 
    void AltHelpCanExecute(object sender, CanExecuteRoutedEventArgs e) 
    { 
     e.CanExecute = true; 
    } 


} 

<UserControl x:Class="SampleWpfApp.TopMenu" 
     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:local="clr-namespace:SampleWpfApp" 
     mc:Ignorable="d" 
     d:DesignHeight="300" d:DesignWidth="300"> 
<UserControl.InputBindings> 
    <KeyBinding Gesture="CTRL+N" Command="{Binding ApplicationCommands.New}" /> 
    <KeyBinding Gesture="CTRL+F1" Command="{x:Static local:TopMenu.ShowHelp}" /> 
</UserControl.InputBindings> 
<UserControl.CommandBindings> 
    <CommandBinding Command="ApplicationCommands.New" 
       Executed="NewExecuted" 
       CanExecute="NewCanExecute"/> 
    <CommandBinding x:Name="HelpCmdBinding" CanExecute="AltHelpCanExecute" Executed="AltHelpExecuted" Command="{x:Static local:TopMenu.ShowHelp}" /> 
</UserControl.CommandBindings> 
<DockPanel> 
    <Menu DockPanel.Dock="Top"> 
     <MenuItem Header="_File"> 
      <MenuItem Header="_New" InputGestureText="Ctrl+N" Command="{Binding ApplicationCommands.New}" /> 
      <MenuItem Header="E_xit" InputGestureText="Alt+F4" /> 
     </MenuItem> 
     <MenuItem Header="_Help"> 
      <MenuItem Header="_View Help" InputGestureText="Ctrl+F1" Command="{x:Static local:TopMenu.ShowHelp}" /> 
      <MenuItem Header="_About" /> 
     </MenuItem> 
    </Menu> 
</DockPanel>

問題是什麼在這裏，當我提出的代碼到用戶控件？僅供參考，在我移動代碼ApplicationCommands.New後，即使單擊菜單也不起作用。

注意：你必須移動從TopMenu向窗口2代碼隱藏，取消所有評論的XAML代碼中的第一個工作版本，評論<local:TopMenu DockPanel.Dock="Top" />

來源

2013-05-08 isakavis

我想我得到了答案。如果有人有更好的方法請告知。我不得不將這段代碼添加到主窗口中。 CommandTarget將其轉發給TopMenu。

<Window.InputBindings> 
     <KeyBinding Gesture="CTRL+N" Command="ApplicationCommands.New" CommandTarget="{Binding ElementName=TopMenu}" /> 
     <KeyBinding Gesture="CTRL+F1" Command="{x:Static local:TopMenu.ShowHelp}" CommandTarget="{Binding ElementName=TopMenu}" /> 
    </Window.InputBindings>

謝謝你的時間。

這是什麼給了我答案，但我在Xaml中做到了。

http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/753c2a0b-753f-43d3-afb3-01d4d3c93787/

來源

2013-05-08 22:37:29 isakavis

WPF CommandBinding爲應用程序菜單與手勢

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