private void ValidateOneAdministratorAssignmentPerInstructor(Department department)
{
if (department.InstructorID != null)
{
Department duplicateDepartment = db.Departments
.Include("Administrator")
.Where(d => d.InstructorID == department.InstructorID)
.AsNoTracking()
.FirstOrDefault();
if (duplicateDepartment != null && duplicateDepartment.DepartmentID != department.DepartmentID)
{
string errorMessage = String.Format(
"Instructor {0} {1} is already administrator of the {2} department.",
duplicateDepartment.Administrator.FirstMidName,
duplicateDepartment.Administrator.LastName,
duplicateDepartment.Name);
ModelState.AddModelError(string.Empty, errorMessage);
}
}
}
public ActionResult Delete(Department department)
{
try
{
db.Entry(department).State = EntityState.Deleted;
db.SaveChanges();
return RedirectToAction("Index");
}
catch (DbUpdateConcurrencyException)
{
return RedirectToAction("Delete", new { concurrencyError = true });
}
catch (DataException /* dex */)
{
//Log the error (uncomment dex variable name after DataException and add a line here to write a log.
ModelState.AddModelError(string.Empty, "Unable to delete. Try again, and if the problem persists contact your system administrator.");
return View(department);
}
}
