TreeViewAction 枚举

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

指定引发 TreeViewEventArgs 事件的操作。

public enum class TreeViewAction

public enum TreeViewAction

type TreeViewAction = 

Public Enum TreeViewAction

继承

Object

ValueType

Enum

TreeViewAction

字段

ByKeyboard	1	此事件由按键操作引发。
ByMouse	2	此事件由鼠标操作引发。
Collapse	3	此事件由 TreeNode 折叠操作引发。
Expand	4	此事件由 TreeNode 展开操作引发。
Unknown	0	引发此事件的操作未知。

示例

下面的代码示例演示如何使用 TreeView.AfterSelect 事件和 TreeViewAction 枚举。 若要运行该示例，请将以下代码粘贴到包含名为 TreeView1 的 TreeView 控件的窗体中。 此示例假定使用项填充 TreeView1，并且事件 TreeView.AfterSelect 已连接到示例中定义的事件处理方法。

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

注解

此枚举由构造函数等 TreeViewEventArgs 成员使用。

另请参阅

• TreeViewEventArgs