Selector.SelectedValue Property

XAML Values

• valueAsString
  A string that is equivalent to the desired value as displayed in UI.

Property Value

Type: System.Object
The value of the selected item, obtained by using the SelectedValuePath, or nulla null reference (Nothing in Visual Basic) if no item is selected. The default value is nulla null reference (Nothing in Visual Basic).

    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>