Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>We can use a attached property to the ListBoxItem (after I implemented I found <a href="http://coderelief.net/2011/01/04/non-selectable-listboxitem-or-listviewitem-using-attached-properties/" rel="nofollow">someone who had done almost the same</a>) :</p> <pre><code>public class ListBoxItemEx { public static bool GetCanSelect(DependencyObject obj) { return (bool)obj.GetValue(CanSelectProperty); } public static void SetCanSelect(DependencyObject obj, bool value) { obj.SetValue(CanSelectProperty, value); } public static readonly DependencyProperty CanSelectProperty = DependencyProperty.RegisterAttached("CanSelect", typeof(bool), typeof(ListBoxItemEx), new UIPropertyMetadata(true, OnCanSelectChanged)); private static void OnCanSelectChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args) { var item = sender as ListBoxItem; if (item == null) return; if ((bool)args.NewValue) { item.Selected -= ListBoxItemSelected; } else { item.Selected += ListBoxItemSelected; item.IsSelected = false; } } private static void ListBoxItemSelected(object sender, RoutedEventArgs e) { var item = sender as ListBoxItem; if (item == null) return; item.IsSelected = false; } } </code></pre> <p>The xaml:</p> <pre><code>&lt;Window x:Class="WpfApplication1.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" xmlns:local="clr-namespace:WpfApplication1" Title="MainWindow" Width="525" Height="350"&gt; &lt;Window.Resources&gt; &lt;Style x:Key="ListBoxItemStyle" TargetType="{x:Type ListBoxItem}"&gt; &lt;Setter Property="local:ListBoxItemEx.CanSelect" Value="{Binding CanSelect}"/&gt; &lt;/Style&gt; &lt;/Window.Resources&gt; &lt;Window.DataContext&gt; &lt;local:ViewModel /&gt; &lt;/Window.DataContext&gt; &lt;Grid Name="LayoutRoot"&gt; &lt;ListBox ItemsSource="{Binding Elements}" ItemContainerStyle="{DynamicResource ListBoxItemStyle}" SelectionMode="Multiple" /&gt; &lt;/Grid&gt; </code></pre> <p></p> <p>The viewmodel:</p> <pre><code>public class ViewModel : INotifyPropertyChanged { #region INotifyPropertyChanged values public event PropertyChangedEventHandler PropertyChanged; protected void OnPropertyChanged(string propertyName) { if (this.PropertyChanged != null) { this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } #endregion public List&lt;Dummy&gt; Elements { get; set; } public ViewModel() { this.Elements = new List&lt;Dummy&gt;(){ new Dummy() { CanSelect =true, MyProperty = "Element1"}, new Dummy() { CanSelect =false, MyProperty = "Element2"}, new Dummy() { CanSelect =true, MyProperty = "Element3"}, new Dummy() { CanSelect =false, MyProperty = "Element4"}, new Dummy() { CanSelect =true, MyProperty = "Element5"}, new Dummy() { CanSelect =true, MyProperty = "Element6"}, new Dummy() { CanSelect =true, MyProperty = "Element7"}, new Dummy() { CanSelect =true, MyProperty = "Element8"}, new Dummy() { CanSelect =false, MyProperty = "Element9"}, }; } } public class Dummy { public bool CanSelect { get; set; } public string MyProperty { get; set; } public override string ToString() { return this.MyProperty; } } </code></pre> <p>The only caveat with this approach is that trying to select an unselectable item unselects the current selected one if the ListBox has single selection, or unselects all, if the ListBox has extended selection.</p>
    singulars
    1. This table or related slice is empty.
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. This table or related slice is empty.
    2. VO
      singulars
      1. This table or related slice is empty.
 

Querying!

 
Guidance

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload