пользовательская цифровая клавиатура

Question

Я сделал пользовательскую цифровую панель управления в wpf. Я хочу знать, когда я установил контроль над формой. когда я нажал любую цифровую кнопку, тогда ее нужно ввести в сфокусированную область. как сделать это это мой XAML сценарий enter code here

 <RowDefinition Height="1*"/> 
     <RowDefinition Height="1*"/> 
     <RowDefinition Height="1*"/> 
    </Grid.RowDefinitions> 
    <Grid.ColumnDefinitions> 
     <ColumnDefinition Width="1*"/> 
     <ColumnDefinition Width="1*"/> 
     <ColumnDefinition/> 
    </Grid.ColumnDefinitions> 

    <Button Name="btn2" Content="2" Focusable="False" FontSize="26" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.Column="1" Grid.Row=" 1" /> 
    <Button Name="btn1" Content="1" Focusable="False" FontSize="26" HorizontalAlignment="Stretch" Grid.Row="1" VerticalAlignment="Stretch" BorderBrush="DarkGray" BorderThickness="4,2,2,8" /> 
    <Button Name="btn3" Content="3" Focusable="False" FontSize="26" Grid.Column="2" Foreground="White" HorizontalAlignment="Stretch" Grid.Row="1" VerticalAlignment="Stretch" /> 
    <Button Name="btn4" Content="4" Focusable="False" FontSize="26" HorizontalAlignment="Stretch" Grid.Row="2" VerticalAlignment="Stretch" /> 
    <Button Name="btn5" Content="5" Focusable="False" FontSize="26" Grid.Column="1" HorizontalAlignment="Stretch" Grid.Row="2" VerticalAlignment="Stretch" /> 
    <Button Name="btn6" Content="6" Focusable="False" FontSize="26" Grid.Column="2" HorizontalAlignment="Stretch" Grid.Row="2" VerticalAlignment="Stretch" /> 
    <Button Name="btn7" Content="7" Focusable="False" FontSize="26" HorizontalAlignment="Stretch" Grid.Row="3" VerticalAlignment="Stretch" /> 
    <Button Name="btn8" Content="8" Focusable="False" FontSize="26" Grid.Column="1" HorizontalAlignment="Stretch" Grid.Row="3" VerticalAlignment="Stretch" /> 
    <Button Name="btn9" Content="9" Focusable="False" FontSize="26" Grid.Column="2" HorizontalAlignment="Stretch" Grid.Row="3" VerticalAlignment="Stretch" /> 
    <Button Name="btn0" Content="0" Focusable="False" FontSize="26" HorizontalAlignment="Stretch" Grid.Row="4" VerticalAlignment="Stretch" /> 
    <Button Name="btn00" Content="00" Focusable="False" FontSize="26" Grid.Column="1" HorizontalAlignment="Stretch" Grid.Row="4" VerticalAlignment="Stretch" /> 
    <Button Name="btn_dot" Content="." Focusable="False" FontSize="26" Grid.Column="2" HorizontalAlignment="Stretch" Grid.Row="4" VerticalAlignment="Stretch" /> 
    <Button Name="btn_temp1" Content="Button" Focusable="False" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" /> 
    <Button Name="btn_temp2" Content="Button" Focusable="False" Grid.Column="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" /> 
    <Button Name="btn_temp3" Content="Button" Focusable="False" Grid.Column="2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" /> 
</Grid> 

``

Answer 1

Вы должны прикрепить обработчик события к UIElement.PreviewKeyDown Event для обработки нажатий клавиш в WPF в вашем UserControl конструктор, или Loaded обработчик событий:

PreviewKeyDown += YourKeyEventHandler; 

...

private void YourKeyEventHandler(object sender, KeyEventArgs e) 
{ 
    // Do something here with e.Key (the pressed key) 
} 

Вы можете узнать больше из связанной страницы на сайте MSDN.