ASP.NET MVC Framework Study Note - 1

浏览数：26 / 时间：2015年06月09日

Dictionary初始化：

Dictionary<string, int> myDict = new Dictionary<string, int> { 
            { "apple", 10 }, 
            { "orange", 20 }, 
            { "plum", 30 } 
        };

Extension Methods（扩展方法）

1.定义一个扩展方法：

using System.Collections.Generic; 
 
public class ShoppingCart { 
 
    public List<Product> Products { get; set; } 
}

public static class MyExtensionMethods { 
 
   // 计算总价 
   public static decimal TotalPrices(this ShoppingCart cartParam) { 
        decimal total = 0; 
        foreach (Product prod in cartParam.Products) { 
            total += prod.Price; 
        } 
        return total; 
    } 
}

2. 应用扩展方法

using System; 
using System.Collections.Generic; 
 
class Program { 
 
    static void Main(string[] args) { 
        // create and populate ShoppingCart  
        ShoppingCart cart = new ShoppingCart { 
            Products = new List<Product> { 
                new Product {Name = "Kayak", Price = 275M}, 
                new Product {Name = "Lifejacket", Price = 48.95M}, 
                new Product {Name = "Soccer ball", Price = 19.50M}, 
                new Product {Name = "Corner flag", Price = 34.95M} 
            } 
        }; 
 
        // get the total value of the products in the cart 
        decimal cartTotal = cart.TotalPrices(); 
 
        Console.WriteLine("Total: {0:c}", cartTotal); 
         
    } 
}