Datagrid multiple columns into one row

Question

I am using datagrid control to represent some data and one combo box.. I want to show values in grid  2 or 3 columns in one row
No of Columns  Depends upon user selection  in combobox. 


Ex: Data

A simple Hello world ASP.NET MVC ( Model view controller) application.  this video we will see how we can share data between  controller and the view
using view data 

display in grid should be like this.

A simple Hello world ASP.NET MVC ( Model view controller) application.

this video we will see how we can share data between

controller and the view using view data