How to populate TreeView from Data Table in ASP.Net web appication

Hi,
I am working on .Net 4.5 web application. I have  a Data Table with 4 columns named as A,B,C,D. the Table has 4 rows Column A has (A1,A2,A3,A4 values),column B has (B1,B2,B3,B4 values),column C has(C1,C2,C3,C4 values) and column D has(D1,D2,D3,D4 values).
I need to show Tree View with  A,B,C & D has 4 parent nodes and respective column values has child nodes.

Thanks.