#977 – DisplayMemberPath Indicates Property to Use for Displaying Bound Items

When you use data binding to bind an ItemsControl to a collection, there are several ways to control how each item in the list is rendered:

  • Rely on the ToString method of the bound item to generate a string to be displayed
  • Use a data template to create a more complex rendering of the item
  • Use the DisplayMemberPath property to indicate which property should be used in generating a string

DisplayMemberPath can be set to the name of a property (of type string) on the bound object.  The value of that property is then used as the displayed value of each item in the list.

Below, the KnownFor property of an Actor is used to generate the string in the ListBox.

        <ListBox Margin="15" Width="200" Height="150"
                 ItemsSource="{Binding ActorList}"
                 SelectedItem="{Binding SelectedActor}"/>
        <TextBlock Text="{Binding SelectedActor.FullName}"
                   HorizontalAlignment="Center" Margin="0,5"/>



#964 – ListBox Data Binding Basics, Part I

You can use data binding to load and manage the items displayed in a ListBox control.

You bind the ItemsSource property of the ListBox to a collection that implements the IEnumerable interface.  The collection bound to can contain any type of object.

If the ListBox is displaying simple strings, you can set the DisplayMemberPath property to the string-typed property of a bound object  that should be used to get the display string for each item.

You can also use binding to bind the SelectedItem property of the ListBox to a property whose type matches the types in the collection that ItemsSource binds to.  When the user selects an item in the ListBox, the corresponding property is updated to refer to the correct item.  And if the property bound to is changed from code-behind, the selected item in the ListBox changes.

Next time: Code sample for all of this.