Question

我知道如何在WPF中设置默认的ApplicationCommands命令，以通过ContextMenu启用简单的剪切，复制和粘贴操作。但是，我需要能够在后面的代码中执行此操作，以便在创建TextBox时可以动态分配命令。

如何在后面的代码中重新创建这个非常简单的WPF代码：

<TextBox x:Name="txtTagName" Style="{StaticResource TextBoxStyle}">
    <TextBox.ContextMenu>
        <ContextMenu Style="{StaticResource DefaultContextMenuStyle}">
            <MenuItem x:Name="cmCut" Header="Cut" Command="ApplicationCommands.Cut" />
            <MenuItem x:Name="cmCopy" Header="Copy" Command="ApplicationCommands.Copy" />
            <MenuItem x:Name="cmPaste" Header="Paste" Command="ApplicationCommands.Paste" />
        </ContextMenu>
    </TextBox.ContextMenu>
</TextBox>

Answer 1

您可以执行以下操作：

this.cmCut.Command = ApplicationCommands.Cut;

Answer 2

如何在后面的代码中重新创建这个非常简单的WPF代码

类似的事情，即您以编程方式创建TextBox和ContextMenu的实例，并设置与您在XAML标记中设置的相同的属性：

TextBox textBox = new TextBox();
textBox.Style = FindResource("TextBoxStyle") as Style;

ContextMenu cm = new ContextMenu();
cm.Style = FindResource("DefaultContextMenuStyle") as Style;
cm.Items.Add(new MenuItem() { Header = "Cut", Command = ApplicationCommands.Cut });
cm.Items.Add(new MenuItem() { Header = "Copy", Command = ApplicationCommands.Copy });
cm.Items.Add(new MenuItem() { Header = "Paste", Command = ApplicationCommands.Paste });

textBox.ContextMenu = cm;

Answer 3

在这里找到好的答案：How do I add a custom routed command in WPF?

我想添加自己的菜单项自定义输入，并为菜单项中显示的命令添加适当的文本。解决我问题的方法是为窗口添加命令绑定和输入绑定部分，在那里我可以绑定命令类并输入该命令：

...
CALL apoc.do.when(
  $imageReference IS NOT NULL,
  ' CREATE (ir:ImageReference {
      id: apoc.create.uuid(), 
      name: ref.name, 
      downloadURL: ref.downloadURL,
      createdAt: datetime(),
      updatedAt: datetime()
    })
    CREATE (p)-[:HAS_ATTACHMENT]->(ir)
    RETURN ir',
  '',
  {ref: $imageReference, p: p}
) YIELD value
WITH p, value.ir AS ir
...

然后我可以像这样在我的MenuItems中使用它（请注意，“ InputGestureText”将快捷方式/输入文本添加到MenuItem中）：

<Window x:Class="SomeNamespace.MainWindow"
    <!--Other stuff here-->
    xmlns:local="clr-namespace:SomeNamespace"
    mc:Ignorable="d"
    Title="MainWindow" Height="544" Width="800">
<Window.CommandBindings>
    <CommandBinding Command="local:Commands.SomeCommand" Executed="CommandBinding_SomeCommand" />
    <CommandBinding Command="local:Commands.SomeOtherCommand" Executed="CommandBinding_SomeOtherCommand" />
</Window.CommandBindings>
<Window.InputBindings>
    <KeyBinding Command="local:Commands.SomeCommand" Key="S" Modifiers="Ctrl" />
    <KeyBinding Command="local:Commands.SomeOtherCommand" Key="O" Modifiers="Ctrl" />
</Window.InputBindings>

“命令”类的代码（在我的示例中为Commands.cs）：

<MenuItem Name="MenuItemSomeCommand" Command="local:Commands.SomeCommand" InputGestureText="Ctrl+S" />
<MenuItem Name="MenuItemSomeOtherCommand" Command="local:Commands.SomeOtherCommand" InputGestureText="Ctrl+O" />

以及MainWindow.xaml.cs中执行绑定命令的代码：

using System.Windows.Input;

namespace SomeNamespace
{
    public static class Commands
    {
        public static readonly RoutedUICommand BuildFiles =
            new RoutedUICommand("Some Command", "SomeCommand", typeof(MainWindow));
        public static readonly RoutedUICommand BuildFiles =
            new RoutedUICommand("Some Other Command", "SomeOtherCommand", typeof(MainWindow));
    }
}

如何在后面的代码中设置WPF ApplicationCommands

3 个答案: