public static void ReturnBook(Student student, LendedBook lendedBook)
{
using (var context = new DbContext()) {
var findLendedBook = context.LendedBooks.Find(lendedBook.Id);
var findBook = context.Books.Find(findLendedBook.CatalogueNumber);
findBook.IsLended = false;
context.LendedBooks.Remove(findLendedBook);
context.SaveChanges();
}
ReturnedOrLendedBook?.Invoke(EventArgs.Empty);
}
public static void LendBook(Student student, Book book, DateTime dateOfReturn)
{
using (var context = new DbContext()) {
var findStudent = context.Students.Find(student.PESEL);
var findBook = context.Books.Find(book.CatalogueNumber);
var lendedBook = new LendedBook {
Student = findStudent,
StudentPesel = findStudent.PESEL,
Book = findBook,
CatalogueNumber = findBook.CatalogueNumber,
DateOfLend = DateTime.Today,
DateOfReturn = dateOfReturn
};
findStudent.LendedBooks.Add(lendedBook);
findBook.IsLended = true;
context.SaveChanges();
}
ReturnedOrLendedBook?.Invoke(EventArgs.Empty);
}
