c# - 连接表单应用程序的收据

Question

因此，我已经尝试了很长一段时间的工作是将表单上选定的单选按钮连接到列表框中，以便将其作为收据读出。我将一个变量receipt 声明为一个空字符串，我很好奇如何使用选中的单选按钮填充receipt 变量。如果需要，我可以提供我拥有的代码，尽管我不确定它是否会有所帮助。

代码如下

public class Order
    {
        public string[] pizzaChoice = new
        string[] {"Plain Slice", "Medium Plain", "Large Plain", "White Slice", "Medium White", "Large White",
                  "Roar Slice", "Roar Medium", "Roar Large", "BBQ Slice", "BBQ Medium", "BBQ Large", 
                  "Cheeseburger Slice", "Cheeseburger Medium", "Cheeseburger Large", "Buffalo Slice", "Buffalo Medium", "Buffalo Large",
                  "The Works Slice", "The Works Medium", "The Works Large"};
        public decimal[] pizzaChoicePrice = new decimal[] {1.50m, 8.00m, 10.00m, 1.75m, 9.00m, 12.00m,
                                                           2.00m, 9.00m, 12.00m, 2.00m, 9.00m, 12.00m,
                                                           2.00m, 9.00m, 12.00m, 2.00m, 9.00m, 12.00m,
                                                           2.50m, 10.00m, 13.00m};
        private string pizza;
        private string drink;
        private string specialRequest;
        private decimal pizzaPrice;
        private decimal drinkPrice;

        public Order()
        {
            pizza = "";
            specialRequest = "";
            drinkPrice = 0;
            pizzaPrice = 0;
        }
        public string Pizza
        {
            get
            {
                return pizza;
            }
            set
            {
                pizza = value;
                SetPizzaPrice();
            }
        }
        public string SpecialRequests
        {
            get
            {
                return specialRequest;
            }
            set
            {
                specialRequest = value;
            }
        }
        public string Drink
        { 
            get
            {
                return drink;
            }
            set 
            {
                drink = value;
                SetDrinkPrice();
            }
        }
        public decimal PizzaPrice
        {
            get
            {
                return pizzaPrice;
            }
        }
        public decimal DrinkPrice
        {
            get
            {
                return drinkPrice;
            }
        }
        public void SetPizzaPrice()
        {
            for (int i = 0; i < pizzaChoice.Length; i++)
            {
                if (pizzaChoice[i] == pizza)
                {
                    pizzaPrice = pizzaChoicePrice[i];
                }
            }
        }
        public void SetDrinkPrice()
        {
            switch (drink)
            {
                case "Small Water":
                case "Medium Water":
                case "Large Water":
                    drinkPrice = 0.00m;
                    break;
                case "Small Fountain Soda":
                case "Can of Soda":
                    drinkPrice = 0.75m;
                    break;
                case "Medium Fountain Soda":
                    drinkPrice = 1.25m;
                    break;
                case "Large Fountain Soda":
                case "Large Iced Tea/Lemonade/Juice":
                    drinkPrice = 2.00m;
                    break;
                case "20 oz Bottled Soda":
                    drinkPrice = 1.75m;
                    break;
                case "2 Liter Bottled Soda":
                    drinkPrice = 2.50m;
                    break;
                case "12 oz Iced Tea/Lemonade/Juice":
                    drinkPrice = 1.00m;
                    break;
                case "24 oz Iced Tea/Lemonade/Juice":
                    drinkPrice = 1.50m;
                    break;
            }
        }
        public decimal TotalBeforeTax()
        {
            return pizzaPrice + drinkPrice;
        }
    }
}

Answer 1

一些建议：

将可以订购的各种东西和价格放在单独的菜单类中。这使您可以将任何与可以订购的物品有关的责任放在一个地方。这将使类 Order 更清洁。

创建一个方法PlaceOrder，CreateOrder或Order在 Menu 类上。让它创建并返回一个订单。这样，Order 类只负责跟踪已订购的内容。

在用户界面/表单中，以任何您喜欢的方式创建单选按钮和其他控件（您甚至可以使用 Menu 类中的信息来动态构建 UI）。在按钮的单击事件中，将所有选定的项目和金额传递给 PlaceOrder 方法。

要以某种可读的方式取回 Order，请向 Order 类添加一个方法，Print并从该方法以可接受的格式返回已存储在 Order 对象中的数据。您可以让该Print方法返回单个字符串，但它也可以是字符串数组。

如果您在执行此操作时遇到困难，请发布任何具体问题。尝试非常具体，并向我们展示您的尝试。