TreeView.OnTreeNodeCollapsed(TreeNodeEventArgs) Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Raises the TreeNodeCollapsed event of the TreeView control.
protected:
virtual void OnTreeNodeCollapsed(System::Web::UI::WebControls::TreeNodeEventArgs ^ e);
protected virtual void OnTreeNodeCollapsed(System.Web.UI.WebControls.TreeNodeEventArgs e);
abstract member OnTreeNodeCollapsed : System.Web.UI.WebControls.TreeNodeEventArgs -> unit
override this.OnTreeNodeCollapsed : System.Web.UI.WebControls.TreeNodeEventArgs -> unit
Protected Overridable Sub OnTreeNodeCollapsed (e As TreeNodeEventArgs)
A TreeNodeEventArgs that contains event data.
The TreeNodeCollapsed event is raised when a node is collapsed in the TreeView control. This allows you to provide an event-handling method that performs a custom routine whenever this event occurs.
Raising an event invokes the event handler through a delegate. For more information about how to handle events, see Handling and Raising Events.
The OnTreeNodeCollapsed method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
When overriding the OnTreeNodeCollapsed(TreeNodeEventArgs) method in a derived class, be sure to call the OnTreeNodeCollapsed(TreeNodeEventArgs) method for the base class so that registered delegates receive the event.
Product | Versions |
---|---|
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET feedback
.NET is an open source project. Select a link to provide feedback: