Selector.SelectedValuePath Property

XAML Values

• propertyPath
  A string that is evaluated as a simple dot syntax path to an object property.

Property Value

Type: System.String
The property path that is used to get the SelectedValue property of the SelectedItem property. The default is Empty.

    Public MyDocs As System.Collections.ObjectModel.ObservableCollection(Of Document) =
        New System.Collections.ObjectModel.ObservableCollection(Of Document)

    Public Sub New()
        MyBase.New()
        InitializeComponent()
        ' Add items to the collection.
        MyDocs.Add(New Document("How to: Use SelectedValuePath"))
        MyDocs.Add(New Document("DataGrid Overview"))
        MyDocs.Add(New Document("Silverlight Designer Overview"))
        comboBox1.DataContext = MyDocs
        textBlock2.DataContext = comboBox1
    End Sub
End Class

' Simple business object.
Public Class Document
    Private nameValue As String
    Private guidValue As Guid

    Public Sub New()
        MyBase.New()

    End Sub

    Public Sub New(ByVal docName As String)
        MyBase.New()
        guidValue = Guid.NewGuid()
        Name = docName
    End Sub

    Public Property Name As String
        Get

            Return nameValue

        End Get
        Set(ByVal value As String)
            nameValue = value
        End Set

    End Property

    Public Property ID As Guid
        Get
            Return guidValue
        End Get
        Set(ByVal value As Guid)
            guidValue = value
        End Set

    End Property
End Class

public partial class MainPage : UserControl
{

    public System.Collections.ObjectModel.ObservableCollection<Document> MyDocs =
        new System.Collections.ObjectModel.ObservableCollection<Document>();
    public MainPage()
    {
        InitializeComponent();

        // Add items to the collection.
        MyDocs.Add(new Document("How to: Use SelectedValuePath"));
        MyDocs.Add(new Document("DataGrid Overview"));
        MyDocs.Add(new Document("Silverlight Designer Overview"));
        comboBox1.DataContext = MyDocs;
        textBlock2.DataContext = comboBox1;
    }
}

// Simple business object.
public class Document
{
    public Document() { }
    public Document(string docName)
    {
        ID = Guid.NewGuid();
        Name = docName;
    }
    public string Name { get; set; }
    public Guid ID { get; set; }

}

    <UserControl x:Class="SelectedValuePath.MainPage"
    xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="https://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="https://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">
    <StackPanel x:Name="LayoutRoot" Background="White" Height="312" Width="400">
        <ComboBox Height="23" ItemsSource="{Binding}" DisplayMemberPath="Name" 
                  SelectedValuePath="ID" 
                  HorizontalAlignment="Left" Margin="5" Name="comboBox1" 
                   Width="238" />
        <TextBlock Height="18" HorizontalAlignment="Left" Margin="5" 
                   Name="textBlock1" Text="Selected Value (GUID):"  Width="238" />
        <TextBlock Height="32" HorizontalAlignment="Left"  Name="textBlock2" 
                   Width="238" Text="{Binding SelectedValue}"/>
    </StackPanel>
</UserControl>