in my controller:

public ActionResult Details()
{

ViewBag.h=new SelectList(new Hobby_MasterService().GetHobbies(),"Hobby_Id");

return View();
}
[HttpPost]
public ActionResult Details(int Hobby_Id)

{

 Hobby_Master hm = new Hobby_MasterService().GetHobby_Data(Hobby_Id);

return View(hm);

}