Redigera

Dela via

Selector.SelectedValue Property

  • Reference

Definition

Namespace:
System.Windows.Controls.Primitives
Assembly:
PresentationFramework.dll

Gets or sets the value of the SelectedItem, obtained by using SelectedValuePath.

public:
 property System::Object ^ SelectedValue { System::Object ^ get(); void set(System::Object ^ value); };
[System.ComponentModel.Bindable(true)]
[System.Windows.Localizability(System.Windows.LocalizationCategory.NeverLocalize)]
public object SelectedValue { get; set; }
[<System.ComponentModel.Bindable(true)>]
[<System.Windows.Localizability(System.Windows.LocalizationCategory.NeverLocalize)>]
member this.SelectedValue : obj with get, set
Public Property SelectedValue As Object

Property Value

Object

The value of the selected item.

Attributes
BindableAttribute LocalizabilityAttribute

Examples

The following example binds a ListBox to a collection of Employee objects. The example sets SelectedValuePath to @EmployeeNumber and SelectedValue to 12345. This selects the Employee that has 12345 as the value of EmployeeNumber. This example also binds a TextBlock to the SelectedValue of the ListBox. When the user changes the selection in the ListBox, the TextBlock is updated to show the employee number of the currently selected employee.

<XmlDataProvider x:Key="Employees" XPath="/Employees/*">
  <x:XData>
    <Employees xmlns="">
      <Employee Name="Terry Adams" Type="FTE" EmployeeNumber="1" />
      <Employee Name="Claire O'Donnell" Type="FTE" EmployeeNumber="12345" />
      <Employee Name="Palle Peterson" Type="FTE" EmployeeNumber="5678" />
      <Employee Name="Amy E. Alberts" Type="CSG" EmployeeNumber="99222" />
      <Employee Name="Stefan Hesse" Type="Vendor" EmployeeNumber="-" />
    </Employees>
  </x:XData>
</XmlDataProvider>

<DataTemplate x:Key="EmployeeItemTemplate">
  <TextBlock Text="{Binding XPath=@Name}" />
</DataTemplate>

<ListBox Name="employeeListBox"
         ItemsSource="{Binding Source={StaticResource Employees}}"
         ItemTemplate="{StaticResource EmployeeItemTemplate}"
         SelectedValue="12345"
         SelectedValuePath="@EmployeeNumber"/>

<TextBlock Text="{Binding ElementName=employeeListBox, 
                  Path=SelectedValue}"/>

Remarks

The SelectedValuePath property specifies the path to the property that is used to determine the value of the SelectedValue property. Setting SelectedValue to a value X attempts to select an item whose value evaluates to X; if no such item can be found, the selection is cleared.

Dependency Property Information
Identifier field SelectedValueProperty
Metadata properties set to true BindsTwoWayByDefault, Journal

Applies to

See also