TreeListControl.Columns Property

Provides access to the column collection.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v20.2.dll

NuGet Packages: DevExpress.WindowsDesktop.Wpf.Grid.Core, DevExpress.Wpf.Grid.Core

Declaration

C#

public TreeListColumnCollection Columns { get; }

VB.NET

Public ReadOnly Property Columns As TreeListColumnCollection

Property Value

Type	Description
TreeListColumnCollection	A TreeListColumnCollection object that is a collection of columns within the control.

Remarks

The TreeList stores its columns within the Columns collection. This collection provides methods that allow you to add new and remove existing columns. Individual columns are specified by TreeListColumn objects, and can be accessed using indexed notation or by the field name (ColumnBase.FieldName).

To access only visible columns whose BaseColumn.Visible property is set to true, use a view’s TreeListView.VisibleColumns property.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the Columns property.

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.

XAML

iterating-through-nodes-via-tree-traversal-api-e3256/CS/DXTreeList_NodeTraversing/MainWindow.xaml#L10

<dxg:TreeListControl Name="treeListControl1" Loaded="treeListControl1_Loaded" >
    <dxg:TreeListControl.Columns>
        <dxg:TreeListColumn FieldName="Name" />

how-to-show-check-boxes-near-nodes-and-check-child-nodes-when-a-parent-node-is-checked-e3466/CS/HierarchicalDataBinding/MainWindow.xaml#L17

<dxg:TreeListControl x:Name="treeList" ItemsSource="{Binding DataItems}" DataContext="{StaticResource viewModel}">
    <dxg:TreeListControl.Columns>
        <dxg:TreeListColumn FieldName="Name" AllowSorting="True" />

how-to-implement-the-drag-and-drop-capability-to-move-a-row-from-one-group-to-another-e3645/CS/Q356907/MainWindow.xaml#L9

<dxg:TreeListControl x:Name="grid" AllowDrop="True">
    <dxg:TreeListControl.Columns>
        <dxg:TreeListColumn FieldName="Text"/>

wpf-spreadsheetcontrol-api-part-3-t289419/CS/SpreadsheetControl_WPF_API_Part03/MainWindow.xaml#L54

<dxg:TreeListControl.Columns>
    <dxg:TreeListColumn Header="Examples" FieldName="RegionName" AllowEditing="False" AllowBestFit="True" AllowDrop="False" AllowSearchPanel="False" />

wpf-spreadsheet-pivot-table-api-t314425/CS/SpreadsheetWPFPivotTableExamples/MainWindow.xaml#L47

<dxg:TreeListControl.Columns>
    <dxg:TreeListColumn Header="Examples" FieldName="RegionName" AllowEditing="False" AllowBestFit="True" AllowDrop="False" AllowSearchPanel="False" />

C#

dxtreelist-how-to-implement-summary-footers-e4793/CS/MyTreeListView.xaml.cs#L119

void SubscribeColumns() {
    foreach (var column in Grid.Columns) {
        d.RemoveValueChanged(column, OnColumnVisibleChanged);

VB.NET

dxtreelist-how-to-implement-summary-footers-e4793/VB/MyTreeListView.xaml.vb#L151

Private Sub SubscribeColumns()
    For Each column In Grid.Columns
        d.RemoveValueChanged(column, AddressOf OnColumnVisibleChanged)