WPF：如何使textblock fire key事件？ [英] WPF: How to make textblock fire key event?

问题描述

TextBlock具有KeyDown和KeyUp事件，但它从未被触发。有没有办法让它发生？

TextBlock has KeyDown and KeyUp event, but it's never fired. Is there a way to make it happen? I just need to detect if any key is pressed.

推荐答案

首先你需要设置 可聚焦 您的TextBlock的属性为True，这将允许您选择项目但不单击以选择它，但如果您处理MouseDown事件您可以手动设置焦点到您的TextBlock。

First of all you will need to set the Focusable Property of your TextBlock to True, This will allow you to Tab to the Item but not Click to select it, but if you handle the MouseDown Event you can manualy set Focus to your TextBlock.

MainWindow.xaml

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
    <Grid >
       <TextBlock Name="tb1"  Height="30" Width ="100" IsEnabled="True"  Focusable="True" KeyDown="tb1_KeyDown" MouseDown="tb1_MouseDown">Hello World</TextBlock>
    </Grid>
</Window>

MainWindow.xaml.cs

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void tb1_KeyDown(object sender, KeyEventArgs e)
    {
        tb1.Background = Brushes.Blue;
    }

    private void button1_Click(object sender, RoutedEventArgs e)
    {
        tb1.Focus();
    }

    private void tb1_MouseDown(object sender, MouseButtonEventArgs e)
    {
        tb1.Focus();
    }
}

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