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KeyDown event in WPF C # window not working

I am trying to get key strokes on a window (not on a form). I am getting the event until the button is clicked. After that no matter what I do, the down event no longer fires. Is there a solution? I have searched for it, it looks like everyone is suggesting a solution with

this.KeyPreview = true;

but that may not work here as Window has no such attribute. Helps is much appreciated. I've already set all child objects Focusable to False and the window is set to focus. But it did not help.

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="463" Width="726" AllowsTransparency="False" PreviewKeyDown="Window_PreviewKeyDown" KeyDown="Window_KeyDown_1" WindowStartupLocation="CenterScreen"  Focusable="True">
    <Window.Background>
        <RadialGradientBrush>
            <GradientStop Color="#FF3EB5FF" Offset="1" />
            <GradientStop Color="White" Offset="0" />
        </RadialGradientBrush>
    </Window.Background>
    <Grid Name="grid1">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="434*" />
            <ColumnDefinition Width="270*" />
        </Grid.ColumnDefinitions>
        <Grid Margin="10,10,0,12" Name="EquiGrid"  Focusable="False">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="2*" />
                <ColumnDefinition Width="198*" />
            </Grid.ColumnDefinitions>
            <Image Grid.ColumnSpan="2" Name="EquiImage" Stretch="Uniform" Margin="0,0,0,6" />
            <Grid Grid.Column="1" Height="100" HorizontalAlignment="Left" Margin="489,90,0,0" Name="grid2" VerticalAlignment="Top" Width="200" />
        </Grid>
        <Label Content="Label" Height="28" Margin="14,12,12,0" Name="longLabel" VerticalAlignment="Top" Grid.Column="1" OpacityMask="White" BorderBrush="Red" Focusable="False">
            <Label.Background>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="White" Offset="0.025" />
                    <GradientStop Color="#FFDBDBDB" Offset="1" />
                </LinearGradientBrush>
            </Label.Background>
        </Label>
        <Label Content="Label" Height="28" Margin="14,46,12,0" Name="latLabel" VerticalAlignment="Top" Grid.Column="1" Focusable="False">
            <Label.Background>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="White" Offset="0.025" />
                    <GradientStop Color="#FFDBDBDB" Offset="1" />
                </LinearGradientBrush>
            </Label.Background>
        </Label>
        <TextBlock Margin="14,80,12,54" Name="descriptionText" Padding="10" Text="" Grid.Column="1" Focusable="False"><TextBlock.Background><LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"><GradientStop Color="White" Offset="0.025" /><GradientStop Color="#FFDBDBDB" Offset="1" /></LinearGradientBrush></TextBlock.Background></TextBlock>
        <Button Content="Load Image" Grid.Column="1" Margin="14,0,0,12" Name="button1" Height="36" VerticalAlignment="Bottom" HorizontalAlignment="Left" Width="124" Click="button1_Click" Focusable="False" />
        <Button Content="Load XML" Grid.Column="1" Margin="0,0,12,12" Name="button2" Height="36" VerticalAlignment="Bottom" HorizontalAlignment="Right" Width="114" Click="button2_Click" Focusable="False" />
    </Grid>
</Window>

and the handler:

 private void Window_KeyDown_1(object sender, System.Windows.Input.KeyEventArgs e)
 { 
       Console.WriteLine("k"); 
 }

I also found out that the problem is in the spotlight. Children, while not targeting them, steal the focus on the window and stop shooting at the event.

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1 answer


Try using the KeyDown event.

In codebehind

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }
    private void Window_KeyDown(object sender, KeyEventArgs e)
    {
        System.Diagnostics.Debug.WriteLine("KeyDown");
        System.Diagnostics.Debug.WriteLine(e.Key);
    }

    private void Window_PreviewKeyDown(object sender, KeyEventArgs e)
    {
        System.Diagnostics.Debug.WriteLine("PreviewKeyDown");
        System.Diagnostics.Debug.WriteLine(e.Key);
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        System.Diagnostics.Debug.WriteLine("Button clicked");
    }
}


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" KeyDown="Window_KeyDown" PreviewKeyDown="Window_PreviewKeyDown">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>
        <TextBox Grid.Row="0"></TextBox>
        <Button Grid.Row="1" Content="Click me!" Click="Button_Click"></Button>
    </Grid>
</Window>
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