TreeViewAction 列舉

定義

命名空間:
System.Windows.Forms
組件:
System.Windows.Forms.dll
來源:
TreeViewAction.cs
來源:
TreeViewAction.cs
來源:
TreeViewAction.cs
來源:
TreeViewAction.cs
來源:
TreeViewAction.cs

指定引發 TreeViewEventArgs 事件的動作。

public enum class TreeViewAction
public enum TreeViewAction
type TreeViewAction = 
Public Enum TreeViewAction
繼承
Object
ValueType
Enum
TreeViewAction

欄位

名稱 值 Description
Unknown 0

導致此事件的具體原因不明。
ByKeyboard 1

事件是由一次按鍵引發的。
ByMouse 2

這起事件是由老鼠操作引起的。
Collapse 3

此事件是因為 TreeNode 坍塌所致。
Expand 4

此事件是因為擴張 TreeNode 所致。

範例

以下程式碼範例示範如何使用 TreeView.AfterSelect 事件與 TreeViewAction 列舉。 要執行範例，將以下程式碼貼上一個包含名為 TreeView1 的 TreeView 控制項的表單。 此範例假設 TreeView1 已填充項目，且 TreeView.AfterSelect 事件與範例中定義的事件處理方法相連結。

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

此枚舉方式被成員使用，例如 TreeViewEventArgs 建構者。

適用於

另請參閱