在c＃控制台应用程序中按下按钮时添加项目

Question

我一直在研究一个包含项目列表的小控制台应用程序，并且当按下一个数字时，相关项目应计算为总数（完成后）。

问题在于如何将这些项目添加到列表视图并在控制台应用程序中显示它们。这是我到目前为止有

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 

namespace SuperMarcado 
{ 
    class MainClass 
    { 
     public static void Main(string[] args) 
     { 

      ShoppingCart myCart = new ShoppingCart(); 

      Product[] shopProducts = new Product[] 
      { 
       new Product("Cheese", 6, "Milk Cheese", "3/12/2016", 4), 
       new Product("Bread", 2, "Grain Bread", "27/11/2016", 8), 
       new Product("Ice Cream", 10, "Ice Cream", "09/11/2001", 1), 
       new Product("Cookies", 100, " Chocolate Cookies", "00/00/0000", 5), 
       new Product("Biscuits", 0.25f, "Vanila ", "08/01/2006", 6) 
      }; 

      Shop shop = new Shop(shopProducts); 
      shop.DisplayProducts(); 
      Console.WriteLine("------------------------------------------------------------"); 

      myCart.printY = Console.CursorTop; 
      myCart.Display(); 
      ConsoleKeyInfo input; 


      while ((input = Console.ReadKey(true)).Key != ConsoleKey.Escape) 
      { 
       if (!Char.IsDigit(input.KeyChar)) 
        return; 
       int index = Convert.ToInt16(input.KeyChar.ToString()) - 1; 

       if (index < 1 || index > shop.products.Length) 
        return; 

       myCart.AddProduct(shop.products[index]); 

       shop.DecreaseAmount(shop.products[index]); 

       shop.DisplayProducts(); 

       myCart.Display(); 



       int userInput = 0; 
       do 
       { 

        userInput = ShoppingCart(); 

       } while (userInput != 5); 
      } 

     } 
     static public int ShoppingCart() 
     { 
      Console.WriteLine("Your cart"); 
      Console.WriteLine(); 
      var result = Console.ReadLine(); 
      return Convert.ToInt32(result); 
     } 


    } 
} 

Answer 1

在第一次拿到，你的问题是第二个循环，删除它，它应该工作打算

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 

namespace SuperMarcado 
{ 
class MainClass 
{ 
    public static void Main(string[] args) 
    { 

     ShoppingCart myCart = new ShoppingCart(); 

     Product[] shopProducts = new Product[] 
     { 
      new Product("Cheese", 6, "Milk Cheese", "3/12/2016", 4), 
      new Product("Bread", 2, "Grain Bread", "27/11/2016", 8), 
      new Product("Ice Cream", 10, "Ice Cream", "09/11/2001", 1), 
      new Product("Cookies", 100, " Chocolate Cookies", "00/00/0000", 5), 
      new Product("Biscuits", 0.25f, "Vanila ", "08/01/2006", 6) 
     }; 

     Shop shop = new Shop(shopProducts); 
     shop.DisplayProducts(); 
     Console.WriteLine("------------------------------------------------------------"); 

     myCart.printY = Console.CursorTop; 
     myCart.Display(); 
     ConsoleKeyInfo input; 


     while ((input = Console.ReadKey(true)).Key != ConsoleKey.Escape) 
     { 
      if (!Char.IsDigit(input.KeyChar)) 
       return; 
      int index = Convert.ToInt16(input.KeyChar.ToString()) - 1; 

      if (index < 1 || index > shop.products.Length) 
       return; 

      myCart.AddProduct(shop.products[index]); 

      shop.DecreaseAmount(shop.products[index]); 

      shop.DisplayProducts(); 

      myCart.Display(); 



      //int userInput = 0; 
      //do 
      //{ 

      // userInput = ShoppingCart(); 

      //} while (userInput != 5); 
     } 

    } 

    //static public int ShoppingCart() 
    //{ 
    // Console.WriteLine("Your cart"); 
    // Console.WriteLine(); 
    // var result = Console.ReadLine(); 
    // return Convert.ToInt32(result); 
    //} 
} 
} 

我的购物类

using System; 
using System.Collections.Generic; 

namespace SuperMarcado 
{ 
internal class ShoppingCart 
{ 
    internal int printY; 
    internal List<Product> productList; 

    public ShoppingCart() 
    { 
     productList = new List<Product>(); 
    } 

    internal void Display() 
    { 
     if (productList.Count == 0) 
      Console.WriteLine("------------------ EMPTY CART------------------ "); 

     foreach (var prod in productList) 
      Console.WriteLine(prod.Name + " value: " + prod.Value); 
    } 

    internal void AddProduct(Product product) 
    { 
     productList.Add(product); 
    } 
} 
}