TreeListNode.Expand(Boolean) Method

Expands the node.

Namespace : DevExpress.XtraTreeList.Nodes

Assembly : DevExpress.XtraTreeList.v25.2.dll

NuGet Packages : DevExpress.Win.Navigation, DevExpress.Win.TreeList

Declaration

• C#
• VB.NET

public void Expand(
    bool animate = false
)

Public Sub Expand(
    animate As Boolean = False
)

Optional Parameters

true to expand the node with animation; otherwise, false.

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Remarks

Use the methods below to expand and collapse tree list nodes.

• TreeList.ExpandAll—expands all nodes.

• TreeList.CollapseAll—collapses all nodes.

• TreeList.ExpandToLevel(System.Int32)—expands nodes up to the specified level. The zeroth level corresponds to root nodes. To obtain a node’s level, use the TreeListNode.Level property.

• TreeList.CollapseToLevel(System.Int32)—collapses all nodes at the specified and subsequent levels.

• TreeListNode.ExpandAll—expands the node’s child nodes.

• TreeListNode.CollapseAll—collapses the node’s child nodes.

• TreeListNode.Expand—expands this node. Use the TreeListNode.HasChildren property to check if a node has child nodes that can be expanded or collapsed.

• TreeListNode.Collapse—collapses this node.

The control’s BeforeExpand, AfterExpand, BeforeCollapse, and AfterCollapse events fire during expand and collapse operations. For example, you can handle the BeforeExpand event to dynamically create child nodes in unbound mode.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the Expand(Boolean) method.

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.

• C#
• VB.NET

drag-drop-grid-rows-to-treelist/CS/DragAndDropRows/Form1.cs#L86

if(node.ParentNode != null)
        node.ParentNode.Expand();
}

drag-drop-grid-rows-to-treelist/VB/DragAndDropRows/Form1.vb#L82

If node.ParentNode IsNot Nothing Then node.ParentNode.Expand()
Next

See Also

Collapse(Boolean)

TreeListNode Class

TreeListNode Members

DevExpress.XtraTreeList.Nodes Namespace