WPF：如何使文本块触发键事件？

Question

TextBlock具有KeyDown和KeyUp事件，但从未触发过。有办法实现吗？我只需要检测是否按下了任何键。

Answer 1

首先，您需要将FocusableTextBlock 的Property 设置为True，这将允许您使用Tab键切换到Item，但不能单击以选中它，但是如果您处理MouseDown事件，则可以手动将Focus设置为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();
    }
}