public ActionResult GetStudySubjects(int sourceFosId, int targetFosId, int semester)
{
if (sourceFosId == 0 || targetFosId == 0 || semester == 0)
{
return(Json(null, JsonRequestBehavior.AllowGet));
}
var data = _studentBusinessLogic.GetFieldsOfStudies(sourceFosId, targetFosId, semester);
return(Json(data, JsonRequestBehavior.AllowGet));
}