Επεξεργασία

Κοινή χρήση μέσω

Selector.SelectedValuePath Property

  • Reference

Definition

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

Gets or sets the path that is used to get the SelectedValue from the SelectedItem.

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

Property Value

String

The path used to get the SelectedValue. The default is an empty string.

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.

Dependency Property Information
Identifier field SelectedValuePathProperty
Metadata properties set to true None

Applies to

See also