use htmltable to show multiple rows in single row

use htmltable to show multiple rows in single row using cod behind

 

i have two tables in which one is master and another is child table.

 

so when i generate the report using vb.net i want below result :

 

 

i want the result like above using the code behind not in the html design format but using the html table row and html table cell

 

any help appriciated.