public ActionResult Edit(EditInstructorViewModel model, string[] selectedCourses)
{
try
{
if (ModelState.IsValid)
{
Instructor instructor = db.Instructors
.Include(i => i.OfficeAssignment)
.Include(i => i.Courses)
.Single(i => i.ID == model.ID);
instructor.LastName = model.LastName;
instructor.FirstMidName = model.FirstMidName;
instructor.HireDate = model.HireDate;
instructor.OfficeAssignment = string.IsNullOrWhiteSpace(model.OfficeAssignment.Location) ? null : model.OfficeAssignment;
UpdateInstructorCourses(selectedCourses, instructor);
db.Entry(instructor).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
}
catch (RetryLimitExceededException /* dex */)
{
//Log the error (uncomment dex variable name and add a line here to write a log.
ModelState.AddModelError("", "Unable to save changes. Try again, and if the problem persists, see your system administrator.");
}
PopulateAssignedCourseData(model);
return(View(model));
}
// GET: Instructor/Edit/5
public ActionResult Edit(int?id)
{
if (id == null)
{
return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
}
Instructor instructor = db.Instructors
.Include(i => i.OfficeAssignment)
.Include(i => i.Courses)
.Single(i => i.ID == id);
if (instructor == null)
{
return(HttpNotFound());
}
EditInstructorViewModel model = new EditInstructorViewModel
{
ID = instructor.ID,
LastName = instructor.LastName,
FirstMidName = instructor.FirstMidName,
HireDate = instructor.HireDate,
Courses = instructor.Courses,
OfficeAssignment = instructor.OfficeAssignment
};
PopulateAssignedCourseData(model);
return(View(model));
}
public IActionResult Create()
{
var courses = _courseRepository.GetAll();
var model = new EditInstructorViewModel()
{
AssignedCourseData = courses.Select(s => new AssignedCourseData()
{
CourseId = s.CourseId,
CourseName = s.CourseName,
Assigned = false
}).ToList()
};
return(View(model));
}
private void PopulateAssignedCourseData(EditInstructorViewModel model = null)
{
var allCourses = db.Courses;
var instructorCourses = model == null ? null : new HashSet <int>(model.Courses.Select(c => c.CourseID));
var viewModel = new List <AssignedCourseData>();
foreach (var course in allCourses)
{
viewModel.Add(new AssignedCourseData
{
CourseID = course.CourseID,
Title = course.Title,
Assigned = instructorCourses == null ? false : instructorCourses.Contains(course.CourseID)
});
}
ViewBag.Courses = viewModel;
}