This is a TreeListView, running in virtual mode. the data is never stored within the control.
Latest Tree View Articles
Use ASP.NET 2.0's TreeView to Display Hierarchical Data
Thanks to ASP.NET 2.0's built-in TreeView control, you can give your Web site a professional-looking navigation system that displays hierarchical data—without having to write lots of code and script.
Bypassing the TreeView.ItemHeight Limitation
Learn to get around the limitation for the maximum value of the .NET TreeView's ItemHeight property.
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