/// <summary>
/// Main method.
/// </summary>
public static void Main()
{
var pr1 = new Product("Chai1", -1, 5);
var pr2 = new Product("Chai2", 99, 5);
var pr3 = new Product("Chai3", 100, 124);
var pr4 = new Product("Chai4", 4, 102);
var pr5 = new Product("Chai5", 5, 101);
List<Product> products = new List<Product>() { pr1, pr2, pr3, pr4, pr5 };
var c1 = new Category(5, "name1");
var c2 = new Category(125, "name2");
var c3 = new Category(124, "name3");
var c4 = new Category(102, "name4");
var c5 = new Category(100, "name5");
var c6 = new Category(101, "name6");
List<Category> categories = new List<Category>() { c1, c2, c3, c4, c5, c6 };
List<int> prl1 = new List<int>() { 99, 4, 100, -1 };
List<int> prl2 = new List<int>() { 4, 5, -1, 100 };
List<int> prl3 = new List<int>() { 99, 4, 5 };
List<int> prl4 = new List<int>() { 100, 91, 5 };
var or1 = new Order("order 1", 1, prl1, new DateTime(2001, 1, 1));
var or2 = new Order("order 2", 2, prl2, new DateTime(2000, 1, 2));
var or3 = new Order("order 3", 3, prl3, new DateTime(2000, 1, 3));
var or4 = new Order("order 4", 4, prl4, new DateTime(2000, 1, 8));
var or5 = new Order("order 5", 5, prl4, new DateTime(2000, 1, 7));
var or6 = new Order("order 6", 6, prl4, new DateTime(2000, 1, 6));
var or7 = new Order("order 7", 7, prl4, new DateTime(2000, 1, 14));
var or8 = new Order("order 8", 8, prl4, new DateTime(2000, 1, 24));
var or9 = new Order("order 9", 9, prl4, new DateTime(2000, 6, 4));
var or10 = new Order("order 14", 14, prl4, new DateTime(2000, 2, 4));
var or11 = new Order("order 24", 24, prl4, new DateTime(2000, 6, 4));
var or12 = new Order("order 34", 34, prl4, new DateTime(2000, 1, 5));
var or13 = new Order("order 44", 44, prl4, new DateTime(2000, 3, 4));
var or14 = new Order("order 54", 54, prl4, new DateTime(2000, 2, 4));
var or15 = new Order("order 64", 64, prl4, new DateTime(2000, 2, 4));
List<Order> orders = new List<Order>() { or1, or2, or3, or4, or5, or6, or7, or8, or9, or10, or11, or12, or13, or14, or15 };
DataStore ds1 = new DataStore(orders, categories, products);
// returns all products with ids between 15 and 30
var prods = ds1.GetProducts().Where(x => x.CategoryId > 15 && x.CategoryId < 30).ToList();
// returns all categories with ids between 105 and 125
var cats = ds1.GetCategories().Where(x => x.CategoryId > 105 && x.CategoryId < 125).ToList();
// returns first 15 orders sorted by order name
var ords = ds1.GetOrders().OrderBy(x => x.Name).Take(15);
// returns first 3 orders which contains a specific productId (-1)
var newprods = ds1.GetOrders().Where(x => x.Products.Contains(-1)).OrderBy(x => x.OrderDate).ToList();
// returns all product with the name of the category which they belong to
var prodCats = from prod in ds1.GetProducts() orderby prod.Name select new { Name = prod.Name };
// returns all categories together with their products
var catsAndProds = from cat in categories
join prod in products on cat.CategoryId equals prod.CategoryId
select new { Category = cat.CategoryName, Prod = prod.Name };
// All orders together with their products and then print it to the screen.
// For every product print its category name as well. Sort the result by orderDate.
var ress = orders.OrderBy(x => x.OrderDate).SelectMany(
x => x.Products.Select(
y => products.Where(
z => z.Id == y).Select(
z => new
{
Order = x.Id,
Product = z.Name
}).FirstOrDefault())).Where(x => x != null).ToList();
}
static void Main(string[] args)
{
DataStore datastore = new DataStore();
datastore.AddCategory(new Category(105, "clothes"));
datastore.AddCategory(new Category(111, "shoes"));
datastore.AddCategory(new Category(120, "vegetables"));
datastore.AddCategory(new Category(121, "fruits"));
datastore.AddCategory(new Category(160, "sweet"));
datastore.AddCategory(new Category(190, "beer"));
datastore.AddCategory(new Category(115, "books"));
datastore.AddProduct(new Product("Tshirt", 15, 105));
datastore.AddProduct(new Product("Skirt", 12, 105));
datastore.AddProduct(new Product("Jeans", 60, 105));
datastore.AddProduct(new Product("Jacket", 89, 105));
datastore.AddProduct(new Product("High-heels", 3, 111));
datastore.AddProduct(new Product("Boots", 7, 111));
datastore.AddProduct(new Product("Flipflops", 16, 111));
datastore.AddProduct(new Product("Cabbage", 57, 120));
datastore.AddProduct(new Product("Lettuce", 58, 120));
datastore.AddProduct(new Product("Carrot", 67, 120));
datastore.AddProduct(new Product("Watermelon", 25, 121));
datastore.AddProduct(new Product("Apple", 90, 121));
datastore.AddProduct(new Product("Chocolate", 66, 160));
datastore.AddProduct(new Product("Cheesecake", 91, 160));
datastore.AddProduct(new Product("Heineken", 13, 190));
datastore.AddProduct(new Product("Zagorka", 63, 190));
datastore.AddProduct(new Product("The Little Prince", 50, 115));
datastore.AddProduct(new Product("East of Eden", 51, 115));
datastore.AddOrder(
new Order(201, new List<int>() { 15, 63, 91 }, DateTime.Now.AddDays(-7).AddHours(3), "firstOrder"));
datastore.AddOrder(
new Order(208, new List<int>() { 57, 7, 60, 90 }, DateTime.Now.AddDays(-3).AddHours(-4), "secondOrder"));
datastore.AddOrder(
new Order(299, new List<int>() { 13, 66, 3, 25, 51 }, DateTime.Now.AddDays(-1).AddDays(-10), "thirdOrder"));
datastore.AddOrder(
new Order(250, new List<int>() { 15, 58, 66, 91, 50 }, DateTime.Now.AddDays(-9).AddHours(5), "fourthOrder"));
datastore.AddOrder(
new Order(284, new List<int>() { 15, 51, 89, 3, 90 }, DateTime.Now.AddDays(-14).AddHours(-6), "fifthOrder"));
datastore.AddOrder(
new Order(260, new List<int>() { 91, 51, 89, 3, 90 }, DateTime.Now.AddDays(-5).AddHours(7), "sixthOrder"));
//Products with ID [15,35]
var queryP = from products in datastore.GetProducts()
where products.ProductID >= 15 && products.ProductID <= 35
select products;
Console.WriteLine("Products with ID between 15 and 35");
Console.WriteLine("|{0,15}|{1,15}|{2,15}","Name", "ProductID", "CategoryID");
foreach (var item in queryP)
{
Console.WriteLine("|{0,15}|{1,15}|{2,15}", item.Name, item.ProductID, item.CategoryID);
}
Console.WriteLine("------------------------------------------------------");
Console.WriteLine();
//Categories with ID [105,125]
var queryC = from categories in datastore.GetCategories()
where categories.CategoryID >= 105 && categories.CategoryID <= 125
select categories;
Console.WriteLine("Categories with ID between 105 and 125");
Console.WriteLine("|{0,15}|{1,15}", "CategoryName", "CategoryID");
foreach (var item in queryC)
{
Console.WriteLine("|{0,15}|{1,15}", item.CategoryName, item.CategoryID);
}
Console.WriteLine("------------------------------------------------------");
Console.WriteLine();
//First 3 orders containing product with id 15
var queryO = from orders in datastore.GetOrders()
where orders.Products.Contains(15)
orderby orders.OrderDate
select orders;
Console.WriteLine("First three orders containing product with ID 15 sorted by order date");
Console.WriteLine("|{0,30}|{1,15}|{2,15}","OrderDate", "OrderName", "OrderID");
foreach (var item in queryO)
{
Console.WriteLine("|{0,30}|{1,15}|{2,15}", item.OrderDate, item.Name, item.OrderID);
}
Console.WriteLine("------------------------------------------------------");
Console.WriteLine();
//Products sorted by name
var querySortedProduts = from products in datastore.GetProducts()
join categories in datastore.GetCategories() on products.CategoryID equals categories.CategoryID
orderby products.Name
select new { ProductName = products.Name, CategoryName = categories.CategoryName};
Console.WriteLine("Products from all categories ordered by product name");
Console.WriteLine("|{0,30}|{1,30}", "ProductName", "CategoryName");
foreach (var item in querySortedProduts)
{
Console.WriteLine("|{0,30}|{1,30}", item.ProductName, item.CategoryName);
}
Console.WriteLine("------------------------------------------------------");
Console.WriteLine();
//Products sorted by category
var querySortedCategory = from products in datastore.GetProducts()
join categories in datastore.GetCategories() on products.CategoryID equals categories.CategoryID
orderby categories.CategoryName
select new { ProductName = products.Name, CategoryName = categories.CategoryName };
Console.WriteLine("Products from all categories ordered by name of category");
Console.WriteLine("|{0,30}|{1,30}", "CategoryName", "ProductName");
foreach (var item in querySortedCategory)
{
Console.WriteLine("|{0,30}|{1,30}", item.CategoryName, item.ProductName);
}
Console.WriteLine("------------------------------------------------------");
Console.WriteLine();
//All categories with their products
var queryAllCategories = from categories in datastore.GetCategories()
join products in datastore.GetProducts() on categories.CategoryID equals products.CategoryID into productsList
let productNames = (from product in productsList
select product.Name)
select new CategoryWithProduct(categories.CategoryName, productNames.ToList(), categories.CategoryID);
Console.WriteLine("All categories with their products");
foreach (var item in queryAllCategories)
{
Console.Write("Category {0} with ID {1} has:", item.CategoryName, item.CategoryID);
Console.WriteLine(string.Join(", ", item.ProductsName));
Console.WriteLine();
}
Console.WriteLine("------------------------------------------------------");
Console.WriteLine();
//Orders sorted by order date
var queryAllOrders = from orders in datastore.GetOrders()
let productsWithCategories = (from productID in orders.Products
join products in datastore.GetProducts() on productID equals products.ProductID
join categories in datastore.GetCategories() on products.CategoryID equals categories.CategoryID
select new { ProdctName = products.Name, CategoryName = categories.CategoryName })
orderby orders.OrderDate
select new {
OrderID = orders.OrderID,
OrderName = orders.Name,
ProductsWithCategories = productsWithCategories,
OrderDate = orders.OrderDate
};
Console.WriteLine("Orders with all products sorted by order date");
foreach (var item in queryAllOrders)
{
Console.WriteLine("{0} ----> OrderName: {1}", item.OrderDate, item.OrderName);
foreach (var product in item.ProductsWithCategories)
{
Console.WriteLine("{0,30}", string.Format("Product {0} - Category {1}", product.ProdctName, product.CategoryName));
}
Console.WriteLine();
}
Console.WriteLine("------------------------------------------------------");
Console.WriteLine();
}