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The DevExpress ASP.NET Tree List (ASPxTreeList) supports unbound mode. In this mode, you need to manually create the tree in code. To create nodes, use the AppendNode method. All you have to do is specify a unique value that identifies the node, and a parent node value, if needed.

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Local Copy of this Demo
To inspect the source code for this demo on your machine, you must first install our components via the DevExpress Component Installer.
You can open a local copy of this online demo directly from this webpage (if using v20.2.8, 21.1.4 or higher).
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The source code files for this demo are installed (by default) in the following directories:
\Users\Public\Documents\DevExpress Demos XX.X\Components\ASP.NET\CS\ASPxTreeListDemos
\Users\Public\Documents\DevExpress Demos XX.X\Components\ASP.NET\VB\ASPxTreeListDemos