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POHow to set the keyboardfocus to a textbox inside a UserControl programmatically?
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  1. POHow to set the keyboardfocus to a textbox inside a UserControl programmatically?
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    copied!<p>I have a UserControl that incorporates a textbox. I want to set the keyboardfocus to this textbox programmatically when the user clicks a button. I tried this:</p> <pre><code>private void Button_Click(object sender,EventArgs e) { Keyboard.Focus(MyUserControl); } </code></pre> <p>no luck. Then I exposed the Textbox in the UserControl though a property of type TextBox</p> <pre><code>private void Button_Click(object sender,EventArgs e) { Keyboard.Focus(MyUserControl.TextBox); } </code></pre> <p>again no luck. Finally I made an eventhandler in the UserControl to handle the GotKeyboardFocus event, calling the Keyboard.Focus method on the textbox inside it.</p> <p>Again no luck?!</p> <p>How to do this??</p> <p>EDIT: The problem is not related to UserControls. It is an issue when you try to pass focus to an other UIElement in a Click or MouseDownHandler. The XAML en code behind below tell their own story: the focus does pass to the textbox but is stolen back by the listbox.</p> <pre><code>&lt;Window x:Class="FocusSpike.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"&gt; &lt;StackPanel&gt; &lt;TextBox Name="FocusedTextBox" Height="30"&gt; &lt;TextBox.Style&gt; &lt;Style TargetType="TextBox"&gt; &lt;Setter Property="Text" Value="I am unfocused..."/&gt; &lt;Setter Property="Opacity" Value=".3"/&gt; &lt;Style.Triggers&gt; &lt;Trigger Property="IsKeyboardFocused" Value="True"&gt; &lt;Trigger.EnterActions&gt; &lt;BeginStoryboard&gt; &lt;Storyboard AutoReverse="True"&gt; &lt;DoubleAnimation Storyboard.TargetProperty="FontSize" To="20"/&gt; &lt;/Storyboard&gt; &lt;/BeginStoryboard&gt; &lt;/Trigger.EnterActions&gt; &lt;Setter Property="Text" Value="I am focused!"/&gt; &lt;Setter Property="Opacity" Value="1"/&gt; &lt;/Trigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/TextBox.Style&gt; &lt;/TextBox&gt; &lt;Button&gt;Click to steal focus.&lt;/Button&gt; &lt;ListBox&gt; &lt;ListBoxItem GotFocus="Listbox_GotFocus"&gt; &lt;Label MouseDown="ListBoxItem_MouseDown"&gt; Click to restore focus &lt;/Label&gt; &lt;/ListBoxItem&gt; &lt;/ListBox&gt; &lt;/StackPanel&gt; &lt;/Window&gt; using System.Windows; using System.Windows.Input; namespace FocusSpike { public partial class Window1 : Window { public Window1() { InitializeComponent(); FocusedTextBox.Focus(); } private void ListBoxItem_MouseDown(object sender, MouseButtonEventArgs e) { Keyboard.Focus(FocusedTextBox);//This does not work, remove it! } private void Listbox_GotFocus(object sender, RoutedEventArgs e) { //Keyboard.Focus(FocusedTextBox);//uncomment to restore focus! } } } </code></pre>
 

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