static void AddUsers(Users user)
{
using (Library2Entities db = new Library2Entities())
{
db.Users.Add(user);
Console.WriteLine("New User Added:" + user.UserLastName);
db.SaveChanges();
}
}
static void AddBook(Book book)
{
using (Library2Entities db = new Library2Entities())
{
db.Book.Add(book);
db.SaveChanges();
Console.WriteLine("New Book Added:" + book.Title);
}
}
static void AddAuthor(Author author)
{
using (Library2Entities db = new Library2Entities())
{
db.Author.Add(author);
db.SaveChanges();
Console.WriteLine("New Author Added:" + author.LastName);
}
}
static void AllDebtors() //Должники
{
using (Library2Entities db = new Library2Entities())
{
var users = db.Users.Where(x => x.IsDebtor == true).ToList();
Console.WriteLine("Список Должников");
foreach (var item in users)
{
Console.WriteLine(item.UserName + " " + item.UserLastName);
}
}
}
static void BooksTakeUser2()
{
using (Library2Entities db = new Library2Entities())
{
var user2 = db.Users.Take(2).ToList().Skip(1).Single();
var bookName = db.Book.Where(b => b.Id == user2.TakeBookId).ToList();
Console.WriteLine("Книга на руках у пользователя №2.");
foreach (var item in bookName)
{
Console.WriteLine(item.Title);
}
}
}
static void AllFreeBooks()
{
using (Library2Entities db = new Library2Entities())
{
var UsersBookId = (from x in db.Users select x.TakeBookId).ToList();
var result = (from b in db.Book where UsersBookId.Contains(b.Id) != true select b.Title).ToList();
Console.WriteLine("Free Books");
foreach (var item in result)
{
Console.WriteLine("{0}", item);
}
}
}
static void AllDebtorsNull() //Обнуление долгов
{
using (Library2Entities db = new Library2Entities())
{
var debtors = db.Users.Where(u => u.IsDebtor == true).ToList();
Console.WriteLine("Должники");
foreach (var item in debtors)
{
item.IsDebtor = false;
db.SaveChanges();
Console.WriteLine("{0} {1}", item.UserLastName, item.IsDebtor);
}
}
}
static void listAuthorsOfBook()
{
using (Library2Entities db = new Library2Entities())
{
var book = db.Book.Take(3).ToList().Skip(2).Single(); //книга №3
var authors = (from x in db.Author where x.Id == book.IdAuthor || x.Id == book.IdAuthor2 select x).ToList();
Console.WriteLine("Список авторов книги №3");
foreach (var item in authors)
{
Console.WriteLine(item.LastName);
}
}
}
