Populate Treeview with just root and parent nodes from a DB table

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C#

ASP.NET

treeview

I have a DB Table. Table Name:Parts Columns:'PartId','name'. This table will always be getting new entries. I want to populate treeview using this tables rows. Tree view will have one 'root' node and only parent nodes(rows of table).

-Part
-sub1(row1)
-sub2(row2)
-sub3(row3)
...
No child nodes here. I have found many articles discussing about creating tree view using two tables(parent and child nodes) but didn't find any examples for doing the above(creating only parent nodes). Please help me by providing the links that are discussing to implement the above or a sample code to start on this.