C# 如何在 WPF 中添加自定义路由命令？

How do I add a custom routed command in WPF?

提问by Sachin Gaur

I have an application that contains Menu and sub menus. I have attached Appliocation Commands to some of the sub menu items such as Cut, Copy and Paste.
I also have some other menu items that do not have application commands.
How could I add a custom command binding to those sub menu items?
I have gone through thisarticle but unable to attach event to my sub menu items.

我有一个包含菜单和子菜单的应用程序。我已将应用命令附加到一些子菜单项，例如剪切、复制和粘贴。
我还有一些其他没有应用程序命令的菜单项。
如何向这些子菜单项添加自定义命令绑定？
我已经阅读了这篇文章，但无法将事件附加到我的子菜单项。

采纳答案by Guffa

I use a static class that I place after the Window1 class (or whatever the window class happens to be named) where I create instances of the RoutedUICommand class:

我使用了一个静态类，它放在 Window1 类（或任何窗口类碰巧被命名的）之后，我在其中创建了 RoutedUICommand 类的实例：

public static class Command {

    public static readonly RoutedUICommand DoSomething = new RoutedUICommand("Do something", "DoSomething", typeof(Window1));
    public static readonly RoutedUICommand SomeOtherAction = new RoutedUICommand("Some other action", "SomeOtherAction", typeof(Window1));
    public static readonly RoutedUICommand MoreDeeds = new RoutedUICommand("More deeds", "MoreDeeeds", typeof(Window1));

}

Add a namespace in the window markup, using the namespace that the Window1 class is in:

在窗口标记中添加一个命名空间，使用 Window1 类所在的命名空间：

xmlns:w="clr-namespace:NameSpaceOfTheApplication"

Now I can create bindings for the commands just as for the application commands:

现在我可以像为应用程序命令一样为命令创建绑定：

<Window.CommandBindings>
    <CommandBinding Command="ApplicationCommands.Open" Executed="CommandBinding_Open" />
    <CommandBinding Command="ApplicationCommands.Paste" Executed="CommandBinding_Paste" />
    <CommandBinding Command="w:Command.DoSomething" Executed="CommandBinding_DoSomething" />
    <CommandBinding Command="w:Command.SomeOtherAction" Executed="CommandBinding_SomeOtherAction" />
    <CommandBinding Command="w:Command.MoreDeeds" Executed="CommandBinding_MoreDeeds" />
</Window.CommandBindings>

And use the bindings in a menu for example:

并使用菜单中的绑定，例如：

<MenuItem Name="Menu_DoSomething" Header="Do Something" Command="w:Command.DoSomething" />

回答by Heinzi

Instead of defining them in a static class, you might as well declare the commands directly in XAML. Example (adapted from Guffas nice example):

与其在静态类中定义它们，不如直接在 XAML 中声明命令。示例（改编自 Guffas 的好示例）：

<Window.Resources>
    <RoutedUICommand x:Key="DoSomethingCommand" Text="Do Something" />
    <RoutedUICommand x:Key="DoSomethingElseCommand" Text="Do Something Else" />
</Window.Resources>
<Window.CommandBindings>
    <CommandBinding Command="{StaticResource DoSomethingCommand}" Executed="CommandBinding_DoSomething" />
    <CommandBinding Command="{StaticResource DoSomethingElseCommand}" Executed="CommandBinding_DoSomethingElse" />
</Window.CommandBindings>
...
<MenuItem Name="Menu_DoSomething" Header="Do Something" Command="{StaticResource DoSomethingCommand}" />

回答by Waleed A.K.

I Know that my answer is too late, but i hope it will help for the future.

我知道我的回答为时已晚，但我希望它对未来有所帮助。

I Like Guffa and Heinzi answers, but you can use only one command to achieve the previous result. I usually use the Help command

我喜欢 Guffa 和 Heinzi 的答案，但您只能使用一个命令来实现先前的结果。我通常使用帮助命令

 <Window.CommandBindings>
        <CommandBinding Command="{StaticResource Help}" Executed="HelpExecuted" />
  </Window.CommandBindings>

and I use CommandParametr with each call e.g

我每次调用都使用 CommandParametr 例如

<Window.InputBindings>
    <KeyBinding Command="{StaticResource Help}" Key="A" Modifiers="Ctrl" CommandParameter="Case1"/>
    <KeyBinding Command="{StaticResource Help}" Key="B" Modifiers="Ctrl" CommandParameter="Case2"/>
    <KeyBinding Command="{StaticResource Help}" Key="C" Modifiers="Ctrl" CommandParameter="Case3"/>
    <KeyBinding Command="{StaticResource Help}" Key="D" Modifiers="Ctrl" CommandParameter="Case4"/>
    <MouseBinding Command="{StaticResource Help}" MouseAction="LeftDoubleClick" CommandParameter="Case5" />
</Window.InputBindings>

or

或者

<Button Command="Help" CommandParameter="Case6" Content="Button">
    <Button.InputBindings>
        <KeyBinding Command="{StaticResource Help}" Gesture="Ctrl+D" CommandParameter="Case7"/>
    </Button.InputBindings>
</Button>

and in the cs file

并在cs文件中

private void HelpExecuted(object sender, ExecutedRoutedEventArgs e)
{
    string str = e.Parameter as string;
    switch (str)
    {
        case null://F1 Pressed default Help
               //Code
            break;
        case "Case1":
               //Code
            break;
        case "Case2":
               //Code
            break;
        case "Case3":
               //Code
            break;
        case "Case4":
            break;
        case "Case5":
               //Code
            break;
        case "Case6":
               //Code
            break;
        case "Case7":
               //Code
            break;
    }
    e.Handled = true;
}

and if you are using MVVM pattern

如果您使用的是 MVVM 模式

private void HelpExecuted(object sender, ExecutedRoutedEventArgs e)
{
    string str = e.Parameter as string;
    Mvvm_Variable.Action(Input: str);
    e.Handled = true;
}

and move the switch to ViewModule site. and Action is a method in the same ViewModule class.

并将开关移动到 ViewModule 站点。和 Action 是同一个 ViewModule 类中的一个方法。