[Expand]General Information
[Expand]WinForms Controls
[Collapse]ASP.NET Controls and MVC Extensions
 [Expand]Prerequisites
 [Expand]What's Installed
 [Expand]Common Concepts
 [Collapse]ASP.NET WebForms Controls
   Getting Started
  [Expand]Grid View
  [Collapse]Tree List
   [Expand]Product Information
   [Collapse]Concepts
    [Expand]Binding to Data
    [Collapse]Data Representation Basics
     [Collapse]Columns
       Accessing Columns
       Data and Command Columns
       Data Columns
       Command Columns
       Creating Columns and Binding Them to Data Fields
       Customization Window
       Customization Window Overview
     [Expand]Nodes
      Tree Generation Algorithm in the ASPxTreeList
    [Expand]Data Editing
    [Expand]Data Shaping and Manipulation
     Drag and Drop
    [Expand]Focus and Navigation
     Appearance Customization
     Save and Restore Layout
    [Expand]Templates
     Toolbars
   [Expand]Visual Elements
   [Expand]Examples
   [Expand]Member Tables
  [Expand]Card View
  [Expand]Reporting
  [Expand]Chart Control
  [Expand]Pivot Grid
  [Expand]Spreadsheet
  [Expand]Rich Text Editor
  [Expand]Scheduler
  [Expand]Site Navigation and Layout
  [Expand]HTML Editor
  [Expand]Gauges
  [Expand]Vertical Grid
  [Expand]Data Editors
  [Expand]Docking and Popups
  [Expand]File Management
  [Expand]Data and Image Navigation
  [Expand]Multi-Use Site Controls
  [Expand]Spell Checker
  [Expand]Query Builder
 [Expand]ASP.NET MVC Extensions
 [Expand]Localization
 [Expand]Redistribution and Deployment
  Get More Help
 [Expand]API Reference
[Expand]ASP.NET Bootstrap Controls
[Expand]ASP.NET Core Bootstrap Controls
[Expand]WPF Controls
[Expand]Xamarin Controls
[Expand]Windows 10 App Controls
[Expand]Office File API
[Expand]Reporting
[Expand]Report and Dashboard Server
[Expand]Dashboard
[Expand]eXpressApp Framework
[Expand]CodeRush
[Expand]CodeRush Classic
[Expand]Cross-Platform Core Libraries
[Expand]Tools and Utilities
 End-User Documentation

Accessing Columns

The ASPxTreeList control stores its columns within the ASPxTreeList.Columns collection. To access only visible columns, use the ASPxTreeList.VisibleColumns property. Individual columns are represented by the TreeListDataColumn objects. A data column can be accessed by specifying its ID, caption or the name of the data source field to which it is bound.

On the client, data columns can be accessed via the methods listed below:

The number of columns can be obtained via the ASPxClientTreeList.GetColumnCount method.

Is this topic helpful?​​​​​​​