WPF KeyUp和KeyDown

xmal:

<Page x:Class="WpfBrowserApplication1.Page1"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    Title="Page1">

    <Grid>

        <TextBox BorderThickness="2" BorderBrush="Red" KeyUp="TextBox_KeyUp" KeyDown="TextBox_KeyDown" >text</TextBox>

    </Grid>

</Page>

Code:

private void TextBox_KeyDown(object sender, KeyEventArgs e)

{

        MessageBox.Show(e.Key.ToString());

}

private void TextBox_KeyUp(object sender, KeyEventArgs e)

{

           MessageBox.Show(e.Key.ToString());

}