I have a WebDataTree in my ASP.NET web application. I want to use it to show the files that users have uploaded to a SQL database. I have two tables in my database: Folders and Files. The Folders table has a FolderID, ParentID, Name. The Files table has a FileID, ParentID, Name. In both tables, the ParentID refers to the folder that contains the item, so a folder can belong to another folder. This is where my problem lies. I cannot figure out how to configure my WebHierarchicalDataSource to recursively relate folders inside of folders inside of folders etc. Can anyone help me set up my WebDataTree this way?