TreeList.ExpandAll() Method

Expands all Tree List nodes.

Namespace: DevExpress.XtraTreeList

Assembly: DevExpress.XtraTreeList.v23.2.dll

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

Declaration

C#

public virtual void ExpandAll()

VB.NET

Public Overridable Sub ExpandAll

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.

  You can also use the TreeListNode.Expanded property to obtain or set whether a node is 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 snippets (auto-collected from DevExpress Examples) contain references to the ExpandAll() 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#

spreadsheet-document-api-examples-part2/CS/SpreadsheetDocServerAPIPart2/Form1.cs#L110

    treeList.DataSource = new Object();
    treeList.ExpandAll();
}

spreadsheet-document-api-chart-examples/CS/SpreadsheetDocServerChartAPISamples/Form1.cs#L167

    treeList.DataSource = new Object();
    treeList.ExpandAll();
}

winforms-richeditcontrol-common-api/CS/RichEditAPISample/Form1.cs#L431

    treeList.DataSource = new Object();
    treeList.ExpandAll();
}

winforms-spreadsheet-pivot-table-api/CS/SpreadsheetPivotTableExamples/Form1.cs#L152

    treeList.DataSource = new Object();
    treeList.ExpandAll();
}

spreadsheet-document-api-pivot-table-examples/CS/SpreadsheetDocServerPivotAPI/Form1.cs#L125

    treeList.DataSource = new Object();
    treeList.ExpandAll();
}

VB.NET

spreadsheet-document-api-examples-part2/VB/SpreadsheetDocServerAPIPart2/Form1.vb#L105

    treeList.DataSource = New [Object]()
    treeList.ExpandAll()
End Sub

spreadsheet-document-api-chart-examples/VB/SpreadsheetDocServerChartAPISamples/Form1.vb#L159

    treeList.DataSource = New Object()
    treeList.ExpandAll()
End Sub

winforms-richeditcontrol-common-api/VB/RichEditAPISample/Form1.vb#L423

    treeList.DataSource = New Object()
    treeList.ExpandAll()
End Sub

winforms-spreadsheet-pivot-table-api/VB/SpreadsheetPivotTableExamples/Form1.vb#L145

    treeList.DataSource = New Object()
    treeList.ExpandAll()
End Sub

spreadsheet-document-api-pivot-table-examples/VB/SpreadsheetDocServerPivotAPI/Form1.vb#L118

    treeList.DataSource = New Object()
    treeList.ExpandAll()
End Sub