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Focus adjustment does not allow instant editing

I have a UserControl WPF with a text box. Here's how to define a text field and its parent control:

   <DockPanel Margin="10,20,10,10" FocusManager.FocusedElement="{Binding ElementName=uxJobNumber}" >
     <TextBox x:Name="uxJobNumber" Text="{Binding JobNumber, Mode=TwoWay, ValidatesOnDataErrors=True}" TextWrapping="Wrap" FontSize="48" BorderBrush="Black" BorderThickness="1"  Margin="10"/>
   </DockPanel>

With FocusManager.FocusedElement set, I see the cursor panel present in the text box. However, the cursor panel does not blink and does not allow the user to immediately start typing.

Without the FocusManager.FocusedElement set, when the application starts, there is no cursor panel at all in the text box.

Here is the full XAML

<UserControl x:Class=""
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         xmlns:converters="clr-namespace:.Modules.Converters"
         xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit/extended"
         xmlns:extToolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit/extended"
         mc:Ignorable="d">
<UserControl.Resources>
    <converters:VisibilityConverter x:Key="Visibility" />
</UserControl.Resources>
<Canvas Width="1024" Height="768" >

    <Border Style="{DynamicResource GroupBox}" Canvas.Left="36.261" Canvas.Top="32.131" Width="426.936">
        <StackPanel>
            <Border>
                <TextBlock Text="STEP 1"/>
            </Border>
            <TextBlock Text="Enter the five (5) digit Job Number and click Verify." />
            <Path/>
            <DockPanel Margin="10,20,10,10" FocusManager.FocusedElement="{Binding ElementName=uxJobNumber}" >
                <Button Content="Verify" Width="125" Height="65" HorizontalAlignment="Right" Command="{Binding SearchJobCommand}" Style="{DynamicResource RedButton}" Margin="0" DockPanel.Dock="Right" IsDefault="True"/>
                <TextBox Text="{Binding JobNumber, Mode=TwoWay, ValidatesOnDataErrors=True}" TextWrapping="Wrap" FontSize="48" BorderBrush="Black" BorderThickness="1" x:Name="uxJobNumber" Margin="10" KeyboardNavigation.TabIndex="0" />
            </DockPanel>
        </StackPanel>
    </Border>
    <TextBlock Text="{Binding Error}" Visibility="{Binding HasError, Converter={StaticResource Visibility}}" Canvas.Left="48" Canvas.Top="288" FontSize="16" Width="403" Foreground="Red" />       
</Canvas>

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2 answers

We finally resorted to using the Focus () method in the code behind when the form is loaded.

private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
   uxJobNumber.Focus();
}
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Using your code, I get this to work; blinking and all.

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