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TreeViewAction Enumeration

Specifies the action that raised a TreeViewEventArgs event.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)
public enum TreeViewAction
Member nameDescription
Supported by the .NET Compact FrameworkUnknownThe action that caused the event is unknown.
Supported by the .NET Compact FrameworkByKeyboardThe event was caused by a keystroke.
Supported by the .NET Compact FrameworkByMouseThe event was caused by a mouse operation.
Supported by the .NET Compact FrameworkCollapseThe event was caused by the TreeNode collapsing.
Supported by the .NET Compact FrameworkExpandThe event was caused by the TreeNode expanding.

This enumeration is used by members such as the TreeViewEventArgs constructor.

The following code example demonstrates how to use the TreeView.AfterSelect event and the TreeViewAction enumeration. To run the example paste the following code in a form containing a TreeView control named TreeView1. This example assumes TreeView1 is populated with items and the TreeView.AfterSelect event is connected to the event-handling method defined in the sample.

	// 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;
		}
	}
		The following class inherits from the Button class and overrides
		the OnMouseHover and OnMouseMove methods to give the button
		some special behavior. To use this example create a new form and copy paste this class in the same file, after the form class.  Add a button of
		type FunButton, defined in the code example, to the form. 

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0
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