public static void UpdateBook(Book newBook)//更新数据库内的书籍
{
RemoveBooks(newBook.BookId);
using (var db = new BookShelfContext())
{
db.Entry(newBook).State = EntityState.Modified;
db.Books.Add(newBook);
db.SaveChanges();
}
}
public static void UpdateShelf(BookShelf newBookShelf)//更新数据库内的书架
{
RemoveBooksFromShelf(newBookShelf.BookShelfId);
using (var db = new BookShelfContext())
{
db.Entry(newBookShelf).State = EntityState.Modified;
db.Books.AddRange(newBookShelf.Books);
db.SaveChanges();
}
}
