Selecting a Textbox Item in a Listbox does not change the selected item of the listbox

Question

I Have a wpf Listbox that display\'s a list of textboxes. When I click on the Textbox the Listbox selection does not change. I have to click next to the TextBox to select th

Answer 1

I used similar to Robert's solution, but without code behind (using attached behavior).

To do so,

First. Create separate class FocusBehaviour:

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace MyBehaviours
{
    public class FocusBehaviour
    {
        #region IsFocused
        public static bool GetIsFocused(Control control)
        {
            return (bool) control.GetValue(IsFocusedProperty);
        }

        public static void SetIsFocused(Control control, bool value)
        {
            control.SetValue(IsFocusedProperty, value);
        }

        public static readonly DependencyProperty IsFocusedProperty = DependencyProperty.RegisterAttached(
            "IsFocused", 
            typeof(bool),
            typeof(FocusBehaviour), 
            new UIPropertyMetadata(false, IsFocusedPropertyChanged));

        public static void IsFocusedPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            var control = sender as Control;
            if (control == null || !(e.NewValue is bool))
                return;
            if ((bool)e.NewValue && !(bool)e.OldValue)
                control.Focus();
        }

        #endregion IsFocused

        #region IsListBoxItemSelected

        public static bool GetIsListBoxItemSelected(Control control)
        {
            return (bool) control.GetValue(IsListBoxItemSelectedProperty);
        }

        public static void SetIsListBoxItemSelected(Control control, bool value)
        {
            control.SetValue(IsListBoxItemSelectedProperty, value);
        }

        public static readonly DependencyProperty IsListBoxItemSelectedProperty = DependencyProperty.RegisterAttached(
            "IsListBoxItemSelected", 
            typeof(bool),
            typeof(FocusBehaviour), 
            new UIPropertyMetadata(false, IsListBoxItemSelectedPropertyChanged));

        public static void IsListBoxItemSelectedPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            var control = sender as Control;
            DependencyObject p = control;
            while (p != null && !(p is ListBoxItem))
            {
                p = VisualTreeHelper.GetParent(p);
            } 

            if (p == null)
                return;

            ((ListBoxItem)p).IsSelected = (bool)e.NewValue;
        }

        #endregion IsListBoxItemSelected
    }
}

Second. Add a style in resources section (my style is rounded black on focus). Notice setter for FocusBehaviour.IsListBoxItemSelected property. You should reference it in xmlns:behave="clr-namespace:MyBehaviours"

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Third. (optional, for reverse task)

You will meet, if not any, reverse task - focusing on TextBox when ListBoxItem get selected. I recommend using another property of Behaviour class, IsFocused. Here is a sample template for ListBoxItem, please notice Property="behave:FocusBehaviour.IsFocused" and FocusManager.IsFocusScope="True"