Populate (Bind) cascading DropDownList without using Entity Framework in ASP.Net MVC

Hi There,

I have created a from with two dropdownlist eg department and course respectively.

Now I bound the department dropdownlist now

I have an issue regarding binding the course dropdownlist on change event of department dropdown.

I am using MVC 4 Razor and using database sql server

Please give some solution so that I can solve this problem.

i am not using entityframework or LINQ.

only basic MVC4 with Razor.