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ASPxTreeList.NodeCollapsing Event

Fires before a node is collapsed.

Namespace: DevExpress.Web.ASPxTreeList

Assembly: DevExpress.Web.ASPxTreeList.v23.2.dll

NuGet Package: DevExpress.Web


public event TreeListNodeCancelEventHandler NodeCollapsing

Event Data

The NodeCollapsing event's data class is TreeListNodeCancelEventArgs. The following properties provide information specific to this event:

Property Description
Cancel Gets or sets whether the operation performed on the processed node should be cancelled.
Node Gets the node currently being processed. Inherited from TreeListNodeEventArgs.


Handle the NodeCollapsing event to specify whether the node is allowed to be collapsed. To cancel this action, set the event parameter’s cancel property to true.

To learn more, see Expanding and Collapsing Nodes.

See Also