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TreeView::TreeNodeCheckChanged Event

Occurs when a check box in the TreeView control changes state between posts to the server.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public:
 event TreeNodeEventHandler^ TreeNodeCheckChanged {
	void add (TreeNodeEventHandler^ value);
	void remove (TreeNodeEventHandler^ value);
}
<asp:TreeView OnTreeNodeCheckChanged="TreeNodeEventHandler" />

The TreeNodeCheckChanged event is raised when a check box in the TreeView control changes state between posts to the server. This allows you to provide an event-handling method that performs a custom routine, such as updating a database or the displayed content, whenever this event occurs.

Even though the TreeNodeCheckChanged event is fired on post back, changing a check box does not cause a post back.

For more information about handling events, see Consuming Events.

The following code example demonstrates how to use the TreeNodeCheckChanged event to update a Label control when the check boxes of the TreeView control change state between posts to the server.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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