Windows apps
Collapse the table of content
Expand the table of content
Information
Switch
Switch
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

TreeView::BeforeSelect Event

.NET Framework (current version)
 

Occurs before the tree node is selected.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

C#
C++
F#
VB
Copy 
public:
event TreeViewCancelEventHandler^ BeforeSelect {
	void add(TreeViewCancelEventHandler^ value);
	void remove(TreeViewCancelEventHandler^ value);
}

For more information about how to handle events, see Handling and Raising Events.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the BeforeSelect event. This report helps you learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox::Show with Console::WriteLine or appending the message to a multiline TextBox.

To run the example code, paste it into a project that contains an instance of type TreeView named TreeView1. Then ensure that the event handler is associated with the BeforeSelect event.

C#
VB
C++
Copy
No code example is currently available or this language may not be supported.

.NET Framework
Available since 1.1
Return to top
Show:
© 2017 Microsoft