TreeListView.CollapseAllNodes() Method
Collapses all nodes.
Namespace: DevExpress.Xpf.Grid
Assembly: DevExpress.Xpf.Grid.v18.2.dll
Declaration
Remarks
To collapse a node, use the TreeListView.CollapseNode method. To expand the specified node or all nodes, use the TreeListView.ExpandNode or TreeListView.ExpandAllNodes method, respectively.
To learn more, see Expanding and Collapsing Nodes .
See Also