劍道UI網 - 在線編輯不會更改數據庫

Question

我下面演示網編輯直列 它的工作原理，但不會改變數據庫，它只是改變popolated 什麼，我需要做的下列表

這裏的代碼

public static IList<Book> All() 
    { 
     IList<Book> result = (IList<Book>)HttpContext.Current.Session["Books"]; 

     if (result == null) 
     { 
      HttpContext.Current.Session["Books"] = result = 
       (from book in new LibraryModel().Books 
       select new Book 
       { 
        PKiBookID=book.PKiBookID, 
        SBookName = book.SBookName, 
        SBookWriter= book.SBookWriter, 
        SDescription=book.SDescription, 
        BStatus=book.BStatus, 
        FKiBookType=book.FKiBookType 

       }).ToList(); 
     } 

     return result; 
    } 
    public static Book One(Func<Book, bool> predicate) 
    { 
     return All().Where(predicate).FirstOrDefault(); 
    } 
    public static void Insert(Book book) 
    { 
     //book.PKiBookID = All().OrderByDescending(p => p.PKiBookID).First().PKiBookID + 1; 
     All().Insert(0,book); 
    } 
    public static void Update(Book book) 
    { 
     Book target = One(p => p.PKiBookID == book.PKiBookID); 
     if (target != null) 
     { 
      target.SBookName = book.SBookName; 
      target.SBookWriter = book.SBookWriter; 
      target.SDescription = book.SDescription; 
      target.BStatus = book.BStatus; 
      target.BookType = new LibraryModel().BookTypes.Single(s => s.PKiBookTypeID == book.FKiBookType); 
     } 
    } 

Answer 1

這個例外是quite well known，有很多文章如何避免它。它也覆蓋在Documentation。