Selector.SelectionChanged 事件

定義

命名空間:

System.Windows.Controls.Primitives

組件:

PresentationFramework.dll

發生於 Selector 的選取範圍變更時。

public:
 event System::Windows::Controls::SelectionChangedEventHandler ^ SelectionChanged;

public event System.Windows.Controls.SelectionChangedEventHandler SelectionChanged;

member this.SelectionChanged : System.Windows.Controls.SelectionChangedEventHandler 

Public Custom Event SelectionChanged As SelectionChangedEventHandler 

事件類型

SelectionChangedEventHandler

範例

下列範例示範如何將事件附加 SelectionChanged 至清單方塊控制項。

<TextBox Name="tb" Width="140" Height="30"></TextBox>
<ListBox Name="lb" Width="100" Height="55" SelectionChanged="PrintText" SelectionMode="Single">
  <ListBoxItem>Item 1</ListBoxItem>
  <ListBoxItem>Item 2</ListBoxItem>
  <ListBoxItem>Item 3</ListBoxItem>
  <ListBoxItem>Item 4</ListBoxItem>
  <ListBoxItem>Item 5</ListBoxItem>
  <ListBoxItem>Item 6</ListBoxItem>
  <ListBoxItem>Item 7</ListBoxItem>
  <ListBoxItem>Item 8</ListBoxItem>
  <ListBoxItem>Item 9</ListBoxItem>
  <ListBoxItem>Item 10</ListBoxItem>
</ListBox>

下列範例示範如何處理 SelectionChanged 事件。

void PrintText(object sender, SelectionChangedEventArgs args)
{
    ListBoxItem lbi = ((sender as ListBox).SelectedItem as ListBoxItem);
    tb.Text = "   You selected " + lbi.Content.ToString() + ".";
}

Private Sub PrintText(ByVal sender As Object, ByVal e As SelectionChangedEventArgs)

    Dim lbsender As ListBox
    Dim li As ListBoxItem

    lbsender = CType(sender, ListBox)
    li = CType(lbsender.SelectedItem, ListBoxItem)
    tb.Text = "   You selected " & li.Content.ToString & "."
End Sub

備註

每當選取範圍變更時，就會發生此事件。 選取範圍不僅可以透過使用者互動來變更，也可以透過系結和其他設定值來變更。

路由事件資訊

識別碼欄位	SelectionChangedEvent
路由策略	鼓 泡
代理人	SelectionChangedEventHandler