Data Binding RadListBox SelectedItems Property

Environment

Property	Value
Product	RadListBox for WPF
Version	2024.1.312

Description

How to data bind the SelectedItems of RadListBox to a collection property in the view model.

Solution

This can be done via the ListBoxSelectedItemsBehavior.SelectedItemsSource attached property.

Defining the view model

public class MainViewModel 
{ 
    public MainViewModel() 
    { 
        Items = new ObservableCollection<MyItemType>(); 
        // populate the Items collection 
 
        SelectedItems = new ObservableCollection<MyItemType>(); 
    } 
 
    public ObservableCollection<MyItemType> Items { get; set; } 
    public ObservableCollection<MyItemType> SelectedItems { get; set; }   
} 

Setting the SelectedItemsSource property

<telerik:RadListBox ItemsSource="{Binding Items}" 
                    telerik:ListBoxSelectedItemsBehavior.SelectedItemsSource="{Binding SelectedItems}" 
                    SelectionMode="Multiple" />