public void execute()
{
//委托起始的使用方法：
//定义方法，定义同方法签名的委托，初始化委托实例，使用委托
BuyBook buybook = new BuyBook(Book);
buybook("委托初始使用方法");
//使用Action内置委托
Action <string> BookAction = new Action <string>(Book);
BookAction("使用Action内置委托");
//使用Func内置委托，含返回值
Func <string, string> RetBook = new Func <string, string>(FuncBook);
Console.WriteLine(RetBook("使用Func内置委托，含返回值"));
//内置委托和匿名委托，同action
Func <string, string> funcAnnoyDelegate = delegate(string str)
{
return("匿名委托定义的方法" + str);
};
Console.WriteLine(funcAnnoyDelegate("funcValue"));
//内置委托和lamda表达式
Func <string, string> funcLamda = (str) =>
{
return("匿名委托定义的方法" + str);
};
Console.WriteLine(funcLamda("funcLamda"));
}
public int Buy(BuyBook buybook)
{
var bookToBuy = context.Books.FirstOrDefault(ww => ww.Title == buybook.BookName);
if (buybook.UserId != null)
{
if (bookToBuy.NumberOfCopys > 0)
{
Purchase purchase = new Purchase();
purchase.BookID = bookToBuy.BookID;
purchase.UserID = buybook.UserId;
purchase.PurchaseData = DateTime.Now;
context.Purchases.Add(purchase);
bookToBuy.NumberOfCopys--;
context.SaveChanges();
return(1);
}
else
{
return(2);
}
}
else
{
return(3);
}
}
static void test9()
{
//建立联系
BuyBook buybook = new BuyBook(Book);
//触发
isdelegate = true;
buybook();
}
private void button1_Click(object sender, EventArgs e)
{
BuyBook buybook = new BuyBook(Book);
buybook();
BuyBook1 buybook1 = new BuyBook1(Book);
buybook1("teasd");
}
public void GetHashCodeTest()
{
ConstantDataFiller filler = new ConstantDataFiller();
DataRepository repository = new DataRepository(filler.Fill(new DataContext()));
BuyBook buyBookA = new BuyBook(repository.GetPublisher(0), repository.GetBookDetails(0), new DateTime(), 12);
BuyBook buyBookB = new BuyBook(repository.GetPublisher(0), repository.GetBookDetails(0), new DateTime(), 12);
Assert.AreEqual(buyBookA.GetHashCode(), buyBookB.GetHashCode());
}
public async Task BuyBookTest()
{
var book = new BuyBook
{
Username = "******",
BookId = "1"
};
var result = await _controller.BuyBook(book);
Assert.IsTrue(result.Result);
}
/// <summary>
/// Buy Book implementation
/// </summary>
/// <param name="data">Model BuyBok that is receiving</param>
/// <returns></returns>
internal async Task <ResultsResponse> BuyBookAction(BuyBook data)
{
return(await Task.Run(() =>
{
try
{
using (var db = new StoreContext())
{
var book = db.Books.FirstOrDefault(m => m.BookId == Int32.Parse(data.BookId));
var user = db.Users.FirstOrDefault(m => m.Name == data.Username);
if (book.Price <= user.Amount)
{
var purchase = new Purchases
{
UserId = user.UserId,
BookId = book.BookId,
Price = book.Price
};
db.Purchases.Add(purchase);
var account = db.Users.Where(U => U.Name == data.Username).FirstOrDefault();
account.Amount = account.Amount - book.Price;
db.SaveChanges();
return new ResultsResponse
{
Result = true,
Message = "The book was bought successfully."
};
}
else
{
return new ResultsResponse
{
Result = false,
Message = "There is not enough money in your account. Please refill your account."
};
}
}
}
catch (Exception e)
{
//Logging Implementation
return new ResultsResponse
{
Result = false,
Message = e.Message
};
}
}));
}
public BookViewModel(MainViewModel mainViewModel)
{
Books = new ObservableCollection <BookEntity>();
filials = new List <FilialEntity>();
BuyBookCMD = new BuyBook(mainViewModel, this);
RentCMD = new Rent(mainViewModel, this);
addBook = new AddBook(this);
DeleteBook = new DeleteBook(this);
UpdateBook = new UpdateBook(this);
currentbook = new BookEntity();
selectbook = new BookEntity();
//if (File.Exists("Filials.json"))
//{
// string jsonFilial = File.ReadAllText("Filials.json");
// this.filials = JsonConvert.DeserializeObject<List<FilialEntity>>(jsonFilial);
//}
//if (File.Exists("Books.json"))
//{
// string jsonBook = File.ReadAllText("Books.json");
// this.Books = JsonConvert.DeserializeObject<ObservableCollection<BookEntity>>(jsonBook);
//}
}
public ActionResult BuyBook(int id)
{
BuyBook data = new BuyBook {
login = false,
Money = false,
succes = false
};
UserView user = new UserView();
BookViewModel book = new BookViewModel();
data.login = true;
user = UIHelper.GetUser(User.Identity.GetUserId());
book = UIHelper.Get1Book(id);
double moneyUser = user.CIF;
double price = book.Price;
if (moneyUser < price)
{
data.Money = true;
return(Json(new { OK = false, Message = "Tài khoản không đủ xin vui lòng nạp thêm" }, JsonRequestBehavior.AllowGet));
}
else
{
data.succes = true;
moneyUser -= price;
DBHelper.UpdateMoneyUser(moneyUser, User.Identity.GetUserId());
BookOrderView a = new BookOrderView {
BookId = id,
ApplicationUserId = User.Identity.GetUserId(),
BuyDate = DateTime.Now
};
DBHelper.AddBookOrder(a);
}
return(Json(new { OK = true, Message = "Mua thành công" }, JsonRequestBehavior.AllowGet));
//return
}
public static void TestAllTwo()
{
BuyBook buyBook = new BuyBook(BookShop);
buyBook();
Action <string> bookActions = new Action <string>(BookShop);
bookActions("程序");
Action <string, string> bookActionsTwo = new Action <string, string>(BookShop);
bookActionsTwo("程序", "长春");
Func <string, string> func = new Func <string, string>(FuncBook);
Console.WriteLine(func("程序"));
// string FuncValue(string s) => $"{s} got";
Func <string, string> funcValue = s => $"{s} got";
Console.WriteLine(funcValue("程序"));
}
public async Task <ResultsResponse> BuyBook(BuyBook data)
{
return(await user.BuyBook(data));
}
public async Task <ResultsResponse> BuyBook(BuyBook data)
{
return(await BuyBookAction(data));
}