使用WPF中文本框的KeyDown事件捕获Ctrl-X

本文关键字：事件 Ctrl-X KeyDown WPF 中文 文本 使用 | 更新日期: 2023-09-27 18:13:54

我试图触发一个事件，当用户按下ctrl-x使用KeyDown事件。这在ctrl-D时工作得很好，但是当ctrl-x被按下时事件不会触发。我猜这是因为ctrl-x是"cut"命令。当ctrl-X被按下时，是否有办法触发事件?

private void textBox_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyboardDevice.IsKeyDown(Key.LeftCtrl) || e.KeyboardDevice.IsKeyDown(Key.RightCtrl))
    {
        switch (e.Key)
        {
            case Key.D:
                //handle D key
                break;
            case Key.X:
                //handle X key
                break;
        }
    }
}

使用WPF中文本框的KeyDown事件捕获Ctrl-X

要在wpf中做到这一点，我尝试这样做:

private void HandleKeyDownEvent(object sender, KeyEventArgs e)
{
    if (e.Key == Key.X && (Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
    {
        MessageBox.Show("You press Ctrl+X :)");
    }
}

您可以覆盖现有的cut命令:

<TextBox>
    <TextBox.InputBindings>
        <KeyBinding Key="X" Modifiers="Control" Command="{Binding TestCommand}" />
    </TextBox.InputBindings>
</TextBox>

您需要创建一个命令

大多数答案都可以完成工作，但是使调试变得很痛苦。因为CTRL是先按下的，所以它应该被分开，这样可以跳过它，只由单个if检查。下面的代码应该是高效且易于调试的。

public MyApp() {
    // other constructor code
    KeyDown += MyApp_KeyDown;    
}
private void MyApp_KeyDown(object sender, KeyEventArgs e) {
    // hold that CTRL key down all day... you'll never get in unless there's another key too. 
    if (Keyboard.Modifiers == ModifierKeys.Control && e.Key!=Key.LeftCtrl && e.Key != Key.RightCtrl) 
    {
        switch (e.Key) // <--- Put the BREAK here.  Stops iff there's another key too.
        {
            case Key.C: UndoRedoStack.InsertInUnDoRedoForCopy(CopyArgs); break;
            case Key.X: UndoRedoStack.InsertInUnDoRedoForCut(CutArgs); break;
            case Key.V: UndoRedoStack.InsertInUnDoRedoForPaste(PasteArgs); break;
            case Key.Y: UndoRedoStack.Redo(1); break;
            case Key.Z: UndoRedoStack.Undo(1); break;
            default: break;
        }
    }
}

我使用这个方法:

private void SomeWindow_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Key == Key.X && (e.KeyboardDevice.Modifiers & ModifierKeys.Control) != 0)
    {
        //Ctrl + X is pressed
    }
}

try following in keydown event

       if (e.Control == true && e.KeyCode==keys.x)
       {
            e.Handled = true;
            textBox1.SelectionLength = 0;
            //Call your method
       }
相关文章：