public ActionResult DeleteConfirmed(int id)
{
BookSubject bookSubject = db.BookSubjects.Find(id);
db.BookSubjects.Remove(bookSubject);
db.SaveChanges();
return(RedirectToAction("Index"));
}
public ActionResult Edit([Bind(Include = "BookSubjectID,BookID,SubjectID")] BookSubject bookSubject)
{
if (ModelState.IsValid)
{
db.Entry(bookSubject).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("Index"));
}
ViewBag.BookID = new SelectList(db.Books, "BookID", "Title", bookSubject.BookID);
ViewBag.SubjectID = new SelectList(db.Subjects, "SubjectID", "SubjectName", bookSubject.SubjectID);
return(View(bookSubject));
}
static void Main(string[] args)
{
CreateSection("Singletons");
Singleton s1 = Singleton.Instance();
Singleton s2 = Singleton.Instance();
if (s1 == s2)
{
Console.WriteLine("Objects are the same instance.");
}
EndSection();
CreateSection("Prototypes");
var p1 = new ConcretePrototype1(1);
Console.WriteLine("Original ID: {0}", p1.Id);
var c1 = (ConcretePrototype1)p1.Clone();
Console.WriteLine("Cloned ID: {0}", c1.Id);
EndSection();
CreateSection("Factory");
var creators = new Creator[2];
creators[0] = new ConcreteCreator();
creators[1] = new ConcreteCreator2();
foreach (Creator creator in creators)
{
Product product = creator.FactoryMethod();
Console.WriteLine("Created {0}", product.GetType().Name);
}
EndSection();
CreateSection("Observer pattern");
var bookSubject = new BookSubject("Gone Girl", "True Crime");
bookSubject.Attach(new ConcreteObserver("The Librarian"));
bookSubject.SubjectType = "Horror";
bookSubject.SubjectType = "Romance";
Console.ReadKey();
}
// GET: BookSubjects/Details/5
public ActionResult Details(int?id)
{
if (id == null)
{
return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
}
BookSubject bookSubject = db.BookSubjects.Find(id);
if (bookSubject == null)
{
return(HttpNotFound());
}
return(View(bookSubject));
}
// GET: BookSubjects/Edit/5
public ActionResult Edit(int?id)
{
if (id == null)
{
return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
}
BookSubject bookSubject = db.BookSubjects.Find(id);
if (bookSubject == null)
{
return(HttpNotFound());
}
ViewBag.BookID = new SelectList(db.Books, "BookID", "Title", bookSubject.BookID);
ViewBag.SubjectID = new SelectList(db.Subjects, "SubjectID", "SubjectName", bookSubject.SubjectID);
return(View(bookSubject));
}
public async Task AddSubjectToBook(int bookId, int subjectId)
{
Book book = await _context.Books.Include(b => b.BookSubjects).ThenInclude(bs => bs.Subject)
.FirstOrDefaultAsync(b => b.Id == bookId);
Subject subject = await _context.Subjects.FindAsync(subjectId);
BookSubject bookSubject = new BookSubject
{
Book = book,
Subject = subject
};
await _context.BookSubjects.AddAsync(bookSubject);
await _context.SaveChangesAsync();
}
