BeforeCollapseEventArgs Class

Provides data for the TreeList.BeforeCollapse event.

Namespace: DevExpress.XtraTreeList

Assembly: DevExpress.XtraTreeList.v18.1.dll

Declaration

C#

public class BeforeCollapseEventArgs :
    NodeEventArgs

VB.NET

Public Class BeforeCollapseEventArgs
    Inherits NodeEventArgs

Related API Members

BeforeCollapseEventArgs is the data class for the following events:

• TreeList.BeforeCollapse

Remarks

The TreeList.BeforeCollapse event occurs before collapsing a Tree List node.

The BeforeCollapseEventArgs.CanCollapse property value indicates whether a node can be collapsed.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the BeforeCollapseEventArgs class.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

VB.NET

how-to-implement-the-cells-multi-selection-feature-in-treelist-e2795/VB/WindowsApplication1/Helper/BlockSelector.vb#L77

Private Sub fList_BeforeCollapse(ByVal sender As Object, ByVal e As BeforeCollapseEventArgs)
    fBlock.Clear()

Inheritance

Object

EventArgs

NodeEventArgs

BeforeCollapseEventArgs