public ActionResult Create(Department department)
{
if (ModelState.IsValid)
{
db.Departments.Add(department);
db.SaveChanges();
return RedirectToAction("Index");
}
ViewBag.PersonID = new SelectList(db.Instructors, "PersonID", "FullName", department.PersonID);
return View(department);
}
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);
}
}
public async Task<ActionResult> Edit(int? id, byte[] rowVersion)
{
string[] fieldsToBind = new string[] { "Name", "Budget", "StartDate", "InstructorID", "RowVersion" };
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
var departmentToUpdate = await db.Departments.FindAsync(id);
if (departmentToUpdate == null)
{
Department deletedDepartment = new Department();
TryUpdateModel(deletedDepartment, fieldsToBind);
ModelState.AddModelError(string.Empty,
"Unable to save changes. The department was deleted by another user.");
ViewBag.InstructorID = new SelectList(db.Instructors, "ID", "FullName", deletedDepartment.InstructorID);
return View(deletedDepartment);
}
if (TryUpdateModel(departmentToUpdate, fieldsToBind))
{
try
{
db.Entry(departmentToUpdate).OriginalValues["RowVersion"] = rowVersion;
await db.SaveChangesAsync();
return RedirectToAction("Index");
}
catch (DbUpdateConcurrencyException ex)
{
var entry = ex.Entries.Single();
var clientValues = (Department)entry.Entity;
var databaseEntry = entry.GetDatabaseValues();
if (databaseEntry == null)
{
ModelState.AddModelError(string.Empty,
"Unable to save changes. The department was deleted by another user.");
}
else
{
var databaseValues = (Department)databaseEntry.ToObject();
if (databaseValues.Name != clientValues.Name)
ModelState.AddModelError("Name", "Current value: "
+ databaseValues.Name);
if (databaseValues.Budget != clientValues.Budget)
ModelState.AddModelError("Budget", "Current value: "
+ String.Format("{0:c}", databaseValues.Budget));
if (databaseValues.StartDate != clientValues.StartDate)
ModelState.AddModelError("StartDate", "Current value: "
+ String.Format("{0:d}", databaseValues.StartDate));
if (databaseValues.InstructorID != clientValues.InstructorID)
ModelState.AddModelError("InstructorID", "Current value: "
+ db.Instructors.Find(databaseValues.InstructorID).FullName);
ModelState.AddModelError(string.Empty, "The record you attempted to edit "
+ "was modified by another user after you got the original value. The "
+ "edit operation was canceled and the current values in the database "
+ "have been displayed. If you still want to edit this record, click "
+ "the Save button again. Otherwise click the Back to List hyperlink.");
departmentToUpdate.RowVersion = databaseValues.RowVersion;
}
}
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.");
}
}
ViewBag.InstructorID = new SelectList(db.Instructors, "ID", "FullName", departmentToUpdate.InstructorID);
return View(departmentToUpdate);
}
public static void Initialize(IServiceProvider serviceProvider)
{
using (var context = new UniversityContext(
serviceProvider.GetRequiredService <
DbContextOptions <UniversityContext> >()))
{
// Look for any movies.
if (context.Student.Any())
{
return; // DB has been seeded
}
var students = new Student[]
{
new Student {
FirstMidName = "Carson", LastName = "Alexander", EnrollmentDate = DateTime.Parse("2005-09-01")
},
new Student {
FirstMidName = "Meredith", LastName = "Alonso", EnrollmentDate = DateTime.Parse("2002-09-01")
},
new Student {
FirstMidName = "Arturo", LastName = "Anand", EnrollmentDate = DateTime.Parse("2003-09-01")
},
new Student {
FirstMidName = "Gytis", LastName = "Barzdukas", EnrollmentDate = DateTime.Parse("2002-09-01")
},
new Student {
FirstMidName = "Yan", LastName = "Li", EnrollmentDate = DateTime.Parse("2002-09-01")
},
new Student {
FirstMidName = "Peggy", LastName = "Justice", EnrollmentDate = DateTime.Parse("2001-09-01")
},
new Student {
FirstMidName = "Laura", LastName = "Norman", EnrollmentDate = DateTime.Parse("2003-09-01")
},
new Student {
FirstMidName = "Nino", LastName = "Olivetto", EnrollmentDate = DateTime.Parse("2005-09-01")
}
};
foreach (Student s in students)
{
context.Student.Add(s);
}
context.SaveChanges();
var instructors = new Instructor[]
{
new Instructor {
FirstMidName = "Kim", LastName = "Abercrombie",
HireDate = DateTime.Parse("1995-03-11")
},
new Instructor {
FirstMidName = "Fadi", LastName = "Fakhouri",
HireDate = DateTime.Parse("2002-07-06")
},
new Instructor {
FirstMidName = "Roger", LastName = "Harui",
HireDate = DateTime.Parse("1998-07-01")
},
new Instructor {
FirstMidName = "Candace", LastName = "Kapoor",
HireDate = DateTime.Parse("2001-01-15")
},
new Instructor {
FirstMidName = "Roger", LastName = "Zheng",
HireDate = DateTime.Parse("2004-02-12")
}
};
foreach (Instructor i in instructors)
{
context.Instructor.Add(i);
}
context.SaveChanges();
var departments = new Department[]
{
new Department {
Name = "English", Budget = 350000,
StartDate = DateTime.Parse("2007-09-01"),
InstructorID = instructors.Single(i => i.LastName == "Abercrombie").ID
},
new Department {
Name = "Mathematics", Budget = 100000,
StartDate = DateTime.Parse("2007-09-01"),
InstructorID = instructors.Single(i => i.LastName == "Fakhouri").ID
},
new Department {
Name = "Engineering", Budget = 350000,
StartDate = DateTime.Parse("2007-09-01"),
InstructorID = instructors.Single(i => i.LastName == "Harui").ID
},
new Department {
Name = "Economics", Budget = 100000,
StartDate = DateTime.Parse("2007-09-01"),
InstructorID = instructors.Single(i => i.LastName == "Kapoor").ID
}
};
foreach (Department d in departments)
{
context.Department.Add(d);
}
context.SaveChanges();
var courses = new Course[]
{
new Course {
CourseID = 1050, Title = "Chemistry", Credits = 3,
DepartmentID = departments.Single(s => s.Name == "Engineering").DepartmentID
},
new Course {
CourseID = 4022, Title = "Microeconomics", Credits = 3,
DepartmentID = departments.Single(s => s.Name == "Economics").DepartmentID
},
new Course {
CourseID = 4041, Title = "Macroeconomics", Credits = 3,
DepartmentID = departments.Single(s => s.Name == "Economics").DepartmentID
},
new Course {
CourseID = 1045, Title = "Calculus", Credits = 4,
DepartmentID = departments.Single(s => s.Name == "Mathematics").DepartmentID
},
new Course {
CourseID = 3141, Title = "Trigonometry", Credits = 4,
DepartmentID = departments.Single(s => s.Name == "Mathematics").DepartmentID
},
new Course {
CourseID = 2021, Title = "Composition", Credits = 3,
DepartmentID = departments.Single(s => s.Name == "English").DepartmentID
},
new Course {
CourseID = 2042, Title = "Literature", Credits = 4,
DepartmentID = departments.Single(s => s.Name == "English").DepartmentID
},
};
foreach (Course c in courses)
{
context.Course.Add(c);
}
context.SaveChanges();
var officeAssignments = new OfficeAssignment[]
{
new OfficeAssignment {
InstructorID = instructors.Single(i => i.LastName == "Fakhouri").ID,
Location = "Smith 17"
},
new OfficeAssignment {
InstructorID = instructors.Single(i => i.LastName == "Harui").ID,
Location = "Gowan 27"
},
new OfficeAssignment {
InstructorID = instructors.Single(i => i.LastName == "Kapoor").ID,
Location = "Thompson 304"
},
};
foreach (OfficeAssignment o in officeAssignments)
{
context.OfficeAssignment.Add(o);
}
context.SaveChanges();
var courseInstructors = new CourseAssignment[]
{
new CourseAssignment {
CourseID = courses.Single(c => c.Title == "Chemistry").CourseID,
InstructorID = instructors.Single(i => i.LastName == "Kapoor").ID
},
new CourseAssignment {
CourseID = courses.Single(c => c.Title == "Chemistry").CourseID,
InstructorID = instructors.Single(i => i.LastName == "Harui").ID
},
new CourseAssignment {
CourseID = courses.Single(c => c.Title == "Microeconomics").CourseID,
InstructorID = instructors.Single(i => i.LastName == "Zheng").ID
},
new CourseAssignment {
CourseID = courses.Single(c => c.Title == "Macroeconomics").CourseID,
InstructorID = instructors.Single(i => i.LastName == "Zheng").ID
},
new CourseAssignment {
CourseID = courses.Single(c => c.Title == "Calculus").CourseID,
InstructorID = instructors.Single(i => i.LastName == "Fakhouri").ID
},
new CourseAssignment {
CourseID = courses.Single(c => c.Title == "Trigonometry").CourseID,
InstructorID = instructors.Single(i => i.LastName == "Harui").ID
},
new CourseAssignment {
CourseID = courses.Single(c => c.Title == "Composition").CourseID,
InstructorID = instructors.Single(i => i.LastName == "Abercrombie").ID
},
new CourseAssignment {
CourseID = courses.Single(c => c.Title == "Literature").CourseID,
InstructorID = instructors.Single(i => i.LastName == "Abercrombie").ID
},
};
foreach (CourseAssignment ci in courseInstructors)
{
context.CourseAssignment.Add(ci);
}
context.SaveChanges();
var enrollments = new Enrollment[]
{
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alexander").ID,
CourseID = courses.Single(c => c.Title == "Chemistry").CourseID,
Grade = Grade.A
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alexander").ID,
CourseID = courses.Single(c => c.Title == "Microeconomics").CourseID,
Grade = Grade.C
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alexander").ID,
CourseID = courses.Single(c => c.Title == "Macroeconomics").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alonso").ID,
CourseID = courses.Single(c => c.Title == "Calculus").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alonso").ID,
CourseID = courses.Single(c => c.Title == "Trigonometry").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alonso").ID,
CourseID = courses.Single(c => c.Title == "Composition").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Anand").ID,
CourseID = courses.Single(c => c.Title == "Chemistry").CourseID
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Anand").ID,
CourseID = courses.Single(c => c.Title == "Microeconomics").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Barzdukas").ID,
CourseID = courses.Single(c => c.Title == "Chemistry").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Li").ID,
CourseID = courses.Single(c => c.Title == "Composition").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Justice").ID,
CourseID = courses.Single(c => c.Title == "Literature").CourseID,
Grade = Grade.B
}
};
foreach (Enrollment e in enrollments)
{
var enrollmentInDataBase = context.Enrollment.Where(
s =>
s.Student.ID == e.StudentID &&
s.Course.CourseID == e.CourseID).SingleOrDefault();
if (enrollmentInDataBase == null)
{
context.Enrollment.Add(e);
}
}
context.SaveChanges();
}
}
