ASPxTreeList.Columns Property

Provides access to an ASPxTreeList’s column collection.

Namespace: DevExpress.Web.ASPxTreeList

Assembly: DevExpress.Web.ASPxTreeList.v18.2.dll

Declaration

C#

[DefaultValue(null)]
public TreeListColumnCollection Columns { get; }

VB.NET

<DefaultValue(Nothing)>
Public ReadOnly Property Columns As TreeListColumnCollection

Property Value

Type	Default	Description
TreeListColumnCollection	*null*	A TreeListColumnCollection object that represents a collection of columns within the ASPxTreeList control.

Remarks

The Columns property stores a collection of TreeListColumn objects that represent columns. It provides methods that allow you to add new and remove existing columns. Individual columns can be accessed using indexed notation.

For detailed information on columns, see Creating Columns and Binding Them to Data Fields and Accessing Columns.

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.

C#

multi-node-editing-via-a-datacell-template-e1314/CS/WebSite/Default.aspx.cs#L37

bool isModified = false;
foreach (TreeListColumn col in tree.Columns)
{

XAF_how-to-enable-in-place-editing-in-the-aspnet-tree-list-view-aspxtreelisteditor-e3570/CS/WebExample.Module.Web/TreeListInlineEditController.cs#L23

editor.TreeList.CommandColumnButtonInitialize += new TreeListCommandColumnButtonEventHandler(TreeList_CommandColumnButtonInitialize);
foreach (TreeListColumn column in editor.TreeList.Columns) {
    if (column is TreeListDataColumn && ((TreeListDataColumn)column).EditCellTemplate != null) {

VB.NET

multi-node-editing-via-a-datacell-template-e1314/VB/WebSite/Default.aspx.vb#L34

Dim isModified As Boolean = False
For Each col As TreeListColumn In tree.Columns
    If TypeOf col Is TreeListDataColumn Then

XAF_how-to-enable-in-place-editing-in-the-aspnet-tree-list-view-aspxtreelisteditor-e3570/VB/WebExample.Module.Web/TreeListInlineEditController.vb#L25

AddHandler editor.TreeList.CommandColumnButtonInitialize, AddressOf TreeList_CommandColumnButtonInitialize
For Each column As TreeListColumn In editor.TreeList.Columns
    If TypeOf column Is TreeListDataColumn AndAlso CType(column, TreeListDataColumn).EditCellTemplate IsNot Nothing Then