本文整理汇总了C#中DataStore.GetCategories方法的典型用法代码示例。如果您正苦于以下问题：C# DataStore.GetCategories方法的具体用法？C# DataStore.GetCategories怎么用？C# DataStore.GetCategories使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DataStore的用法示例。
在下文中一共展示了DataStore.GetCategories方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Main
static void Main()
{
List<Product> products = new List<Product>() {
new Product("Candy", 1, 101),
new Product("Wine", 45, 140),
new Product("Bread", 87, 101),
new Product("IPhone", 24, 112),
new Product("Laptop", 65, 110),
new Product("Pants", 75, 180),
new Product("Suit", 23, 180),
new Product("The Power of Habit", 60, 132),
new Product("Table", 10, 168)
};
List<Category> categories = new List<Category>()
{
new Category(101, "Food"),
new Category(110, "Computers and Laptops"),
new Category(112, "Phones"),
new Category(132, "Education"),
new Category(140, "Drinks"),
new Category(168, "Home"),
new Category(180, "Clothes")
};
List<Order> orders = new List<Order>()
{
new Order(201, new List<int>() {45, 23, 10}, new DateTime(2016, 01, 20, 7, 30, 00), "order1"),
new Order(240, new List<int>() {1, 87, 75, 23 }, new DateTime(2016, 01, 21, 8, 00, 00), "order2"),
new Order(263, new List<int>() {24, 65, 60 }, new DateTime(2016, 01, 24, 9, 20, 00), "order3"),
new Order(290, new List<int>() {23, 75, 24, 45 }, new DateTime(2016, 01, 25, 10, 30, 00), "order4"),
new Order(220, new List<int>() {87, 24, 23 }, new DateTime(2016, 01, 26, 10, 00, 00), "order5")
};
DataStore store = new DataStore(products, categories, orders);
var firstQuery = from product in store.GetProducts()
where product.ProductId >= 15
&& product.ProductId <= 30
select product;
var secondQuery = from category in store.GetCategories()
where category.CategoryId >= 105
&& category.CategoryId <= 125
select category;
var thirdQuery = (from order in store.GetOrders()
orderby order.Name
select order).Take(15);
var fourthQuery = (from order in store.GetOrders()
where order.Products.Contains(23)
orderby order.OrderDate
select order.OrderDate).Take(3);
var fifthQuery = from category in store.GetCategories()
join product in store.GetProducts() on category.CategoryId equals product.CategoryId
orderby category.CategoryName
select new { ProductName = product.Name, CategoryName = category.CategoryName };
var sixthQuery = from category in store.GetCategories()
join product in store.GetProducts() on category.CategoryId equals product.CategoryId into productsGroup
let productNames = ( from prod in productsGroup
select prod.Name)
select new { CategoryName = category.CategoryName, ProductNames = productNames.ToList() };
var seventhQuery = from order in store.GetOrders()
let productsList = (from productId in order.Products
join product in store.GetProducts() on productId equals product.ProductId
join category in store.GetCategories() on product.CategoryId equals category.CategoryId
select new { ProductName = product.Name, CategoryName = category.CategoryName })
orderby order.OrderDate
select new
{
OrderName = order.Name,
OrderDate = order.OrderDate,
ProductsWithCategory = productsList
};
foreach (var item in seventhQuery)
{
Console.Write($"{item.OrderName} - {item.OrderDate}");
foreach (var product in item.ProductsWithCategory)
{
Console.Write($" {product.ProductName} - {product.CategoryName}, ");
}
Console.WriteLine();
}
}