public JsonResult Add(CourseOfferingViewModel viewModel)
{
// Populate VM
viewModel = PopulateViewModel(viewModel);
// Validate model state
if (!ModelState.IsValid)
return Json(new { error = true, message = "There were errors in the submission"});
// Attempt to add the offering
try
{
var offering = new CourseOffering()
{
Course_CourseID = viewModel.SelectedCourseId,
Semester = viewModel.Semester.ToString(),
Year = viewModel.SelectedYear
};
_courseService.AddCourseOffering(offering);
}
catch (CourseOfferingExistsException)
{
// If the offering already exists, display error
return Json(new { error = true, message = "Course offering already exists" });
}
return Json(new { error = false, message = "Course offering successfully created!" });
}
// Populate CourseOffering View Model
public CourseOfferingViewModel PopulateViewModel(CourseOfferingViewModel viewModel)
{
viewModel.Courses = _courseService.GetAllCourses().OrderBy(c => c.CourseTitle).ToList();
viewModel.CourseOfferings = _courseService.GetAllCourseOfferings();
viewModel.CourseOfferings.Sort(new CourseOfferingComparer());
viewModel.Years = Enumerable.Range(DateTime.Now.Year, 4).Select(i => new SelectListItem
{
Text = i.ToString(),
Value = i.ToString()
});
return viewModel;
}
public JsonResult List(string courseId)
{
// Get the selected course offerings
var offerings = _courseService.GetAllCourseOfferings().Where(o => o.Course_CourseID == courseId).ToList();
// Update view model with the list of offerings and selected course description
var viewModel = new CourseOfferingViewModel()
{
CourseOfferings = offerings,
Description = _courseService.GetCourseById(courseId).Description
};
// Return a Json object with the course description and the partial view
return Json(new { description = viewModel.Description, partial = RenderPartialViewToString("_DisplayOfferings", viewModel) }, JsonRequestBehavior.AllowGet);
}