static void Main()
{
using (var dataBase = new ShopContext())
{
#region FillDataBase
var cpuCategory = new Category {
Name = "CPU"
};
var ramCategory = new Category {
Name = "RAM"
};
var keyboardCategory = new Category {
Name = "Keyboard"
};
var mouseCategory = new Category {
Name = "Mouse"
};
var hidCategory = new Category {
Name = "HID"
};
var componentsCategory = new Category {
Name = "Components"
};
dataBase.Categories.Add(cpuCategory);
dataBase.Categories.Add(ramCategory);
dataBase.Categories.Add(keyboardCategory);
dataBase.Categories.Add(mouseCategory);
dataBase.Categories.Add(hidCategory);
dataBase.Categories.Add(componentsCategory);
var intelCoreI7 = new Product {
Name = "Intel Core i7", Categories = new List <Category> {
cpuCategory, componentsCategory
}, Price = 22999
};
var corsairRam = new Product {
Name = "Corsair XMS3", Categories = new List <Category> {
ramCategory, componentsCategory
}, Price = 1999
};
var logitechMouse = new Product {
Name = "Logitech M90", Categories = new List <Category> {
mouseCategory, hidCategory
}, Price = 450
};
var microsoftKeyboard = new Product {
Name = "Microsoft Wired Keyboard 600", Categories = new List <Category> {
keyboardCategory, hidCategory
}, Price = 999
};
dataBase.Products.Add(intelCoreI7);
dataBase.Products.Add(corsairRam);
dataBase.Products.Add(logitechMouse);
dataBase.Products.Add(microsoftKeyboard);
var ivanovCustomer = new Customer {
Name = "Иванов Иван Иванович", PhoneNumber = "+7 999 123-456", Email = "*****@*****.**"
};
var petrovCustomer = new Customer {
Name = "Петров Петр Петрович", PhoneNumber = "+7 988 456-123", Email = "*****@*****.**"
};
var nikolaevCustomer = new Customer {
Name = "Николаев Николай Николаевич", PhoneNumber = "+7 931 415-926", Email = "*****@*****.**"
};
dataBase.Customers.Add(ivanovCustomer);
dataBase.Customers.Add(petrovCustomer);
dataBase.Customers.Add(nikolaevCustomer);
dataBase.Orders.Add(new Order
{
Customer = ivanovCustomer,
Date = new DateTime(2019, 06, 12),
Products = new List <Product> {
intelCoreI7
}
});
dataBase.Orders.Add(new Order
{
Customer = ivanovCustomer,
Date = new DateTime(2019, 06, 13),
Products = new List <Product> {
intelCoreI7
}
});
dataBase.Orders.Add(new Order
{
Customer = ivanovCustomer,
Date = new DateTime(2019, 06, 14),
Products = new List <Product> {
intelCoreI7
}
});
dataBase.Orders.Add(new Order
{
Customer = petrovCustomer,
Date = new DateTime(2019, 06, 14),
Products = new List <Product> {
corsairRam, logitechMouse
}
});
dataBase.Orders.Add(new Order
{
Customer = nikolaevCustomer,
Date = new DateTime(2019, 06, 14),
Products = new List <Product> {
corsairRam, logitechMouse, microsoftKeyboard
}
});
dataBase.Orders.Add(new Order
{
Customer = ivanovCustomer,
Date = new DateTime(2019, 06, 15),
Products = new List <Product> {
intelCoreI7, corsairRam, logitechMouse, microsoftKeyboard
}
});
dataBase.SaveChanges();
#endregion
var targetCustomers = dataBase.Customers.Where(n => n.Name.Contains("Николаевич"));
Console.WriteLine($"Найдено Николаевичей: {targetCustomers.Count()}");
Console.WriteLine();
foreach (var customer in targetCustomers)
{
customer.Name = customer.Name.Replace("Николаевич", "Сергеевич");
}
dataBase.SaveChanges();
var mostSoldProduct = dataBase.Orders
.SelectMany(x => x.Products)
.GroupBy(n => n)
.OrderByDescending(n => n.Count())
.FirstOrDefault();
Console.WriteLine($"Самый продаваемый товар: {mostSoldProduct?.Key.Name} ({mostSoldProduct?.Count()} шт.)");
Console.WriteLine();
var moneyByCustomer = dataBase.Orders.GroupBy(n => n.Customer)
.Select(g => new
{
CustomerName = g.Select(n => n.Customer.Name).FirstOrDefault(),
Total = g.Sum(s => s.Products.Select(t => t.Price).Sum())
})
.ToList()
.Select(x => $"{x.CustomerName} - {x.Total.ToString()} руб.");
Console.WriteLine("Сумма, потраченная каждым клиентом:");
Console.WriteLine(string.Join("\n", moneyByCustomer));
Console.WriteLine();
var countByCategory = dataBase.Orders
.SelectMany(o => o.Products)
.SelectMany(p => p.Categories)
.GroupBy(n => n).OrderByDescending(n => n.Count()).ToList();
Console.WriteLine("Продано товаров каждой категории:");
Console.WriteLine(string.Join("\n", countByCategory.Select(n => $"{n.Key.Name} - {n.Count()} шт.")));
}
Console.ReadLine();
}
