本文整理汇总了C#中ShoppingCart.Select方法的典型用法代码示例。如果您正苦于以下问题：C# ShoppingCart.Select方法的具体用法？C# ShoppingCart.Select怎么用？C# ShoppingCart.Select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ShoppingCart的用法示例。
在下文中一共展示了ShoppingCart.Select方法的2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
public static void Main()
{
var cart = new ShoppingCart {
Products = new List<Product> {
new Product {Name = "Kayak", Category = "Watersports", Price = 275M},
new Product {Name = "Lifejacket", Category = "Watersports", Price = 48.95M},
new Product {Name = "Soccer ball", Category = "Soccer", Price = 19.50M},
new Product {Name = "Corner flag", Category = "Soccer", Price = 34.95M}
}
};
//query-syntax
var sortedPriceList = from product in cart
orderby product.Price descending
select product.Price;
foreach (var price in sortedPriceList) {
Console.Write(price + ", ");
}
Console.WriteLine();
//dot-notation-syntax
var topThreeprices = cart
.OrderByDescending(product => product.Price)
.Take(3)
.Select(product => product.Price);
foreach (var price in topThreeprices) {
Console.Write(price + ", ");
}
Console.WriteLine();
var namePriceMap = cart
.Select(product => new {
Name = product.Name,
Price = product.Price
});
foreach (var product in namePriceMap) {
Console.Write(product.Name + " : " + product.Price + ", ");
}
Console.WriteLine();
}示例2: GetProducts
/// <summary>
/// Gets the products.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="cart">The cart.</param>
/// <returns></returns>
public static IQueryable<Product> GetProducts(this DbSet<Product> source, ShoppingCart cart)
{
var productIds = cart.Select(item => item.Product.ProductID);
return from p in source
where productIds.Contains(p.ProductID)
orderby p.Title
select p;
}