TreeView.AfterSelect 事件

  • 參考

定義

命名空間:
System.Windows.Forms
組件:
System.Windows.Forms.dll

發生於選取樹狀節點之後。

public:
 event System::Windows::Forms::TreeViewEventHandler ^ AfterSelect;
public event System.Windows.Forms.TreeViewEventHandler AfterSelect;
public event System.Windows.Forms.TreeViewEventHandler? AfterSelect;
member this.AfterSelect : System.Windows.Forms.TreeViewEventHandler 
Public Custom Event AfterSelect As TreeViewEventHandler

事件類型

TreeViewEventHandler

範例

下列程式碼範例示範如何使用 TreeViewAction 列舉。 若要執行此範例，請將下列程式碼貼到包含 TreeView 名為 TreeView1 之控制項的表單中。 這個範例會要求 TreeView1 填入專案，而且 AfterSelect 事件會連接到範例中定義的事件處理常式。

private:
   // Handle the After_Select event.
   void TreeView1_AfterSelect( System::Object^ /*sender*/, System::Windows::Forms::TreeViewEventArgs^ e )
   {
      
      // Vary the response depending on which TreeViewAction
      // triggered the event. 
      switch ( (e->Action) )
      {
         case TreeViewAction::ByKeyboard:
            MessageBox::Show( "You like the keyboard!" );
            break;

         case TreeViewAction::ByMouse:
            MessageBox::Show( "You like the mouse!" );
            break;
      }
   }

// Handle the After_Select event.
private void TreeView1_AfterSelect(System.Object sender, 
    System.Windows.Forms.TreeViewEventArgs e)
{

    // Vary the response depending on which TreeViewAction
    // triggered the event. 
    switch((e.Action))
    {
        case TreeViewAction.ByKeyboard:
            MessageBox.Show("You like the keyboard!");
            break;
        case TreeViewAction.ByMouse:
            MessageBox.Show("You like the mouse!");
            break;
    }
}

' Handle the After_Select event.
Private Sub TreeView1_AfterSelect(ByVal sender As System.Object, _
    ByVal e As System.Windows.Forms.TreeViewEventArgs) _
        Handles TreeView1.AfterSelect

    ' Vary the response depending on which TreeViewAction
    ' triggered the event. 
    Select Case (e.Action)
        Case TreeViewAction.ByKeyboard
            MessageBox.Show("You like the keyboard!")
        Case TreeViewAction.ByMouse
            MessageBox.Show("You like the mouse!")
    End Select
End Sub

備註

取消選取節點時，不會發生此事件。 若要偵測選取範圍是否已清除，您可以測試 TreeNode.IsSelected 屬性。

如需處理事件的詳細資訊，請參閱 處理和引發事件。

適用於

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