public JsonResult GetCourseList(int departmentId)
{
IEnumerable <Course> coursesList = aCourseManager.GetCourseByDeptId(departmentId);
IEnumerable <CourseAssignTeacher> assingList =
aCourseAssignToTeacherManager.GetListByDepartmentId(departmentId);
List <Course> courses = new List <Course>();
foreach (var list in coursesList)
{
CourseAssignTeacher assign = assingList.FirstOrDefault(x => x.CourseId == list.Id);
if (assign == null)
{
courses.Add(list);
}
}
return(Json(courses, JsonRequestBehavior.AllowGet));
}