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我的一切运行良好，但我正在寻找一种方法来提示用户是否输入了重复的订单号并让他们重新输入新的订单号。现在它只接受重复项并且不显示我想要的错误消息。我创建了两个类Order作为基础，和ShippedOrder. 这是我在Order课堂上使用的 equals 方法。

    public override bool Equals(Object e)
    {
        bool equal;
        Order temp = (Order)e;
        if (orderNumber == temp.orderNumber)
            equal = true;
        else
            equal = false;
        return equal;

这是我在主要方法中的内容。如果有帮助，我可以发布所有内容。我再次寻求帮助以找到一种方法来防止用户输入相同的两个订单号。

static void Main(string[] args)
    {

        double sum = 0;
        ShippedOrder[] orderArray = new ShippedOrder[5];
        ShippedOrder[] check = new ShippedOrder[5];
        bool wrong = true;
        for (int x = 0; x < orderArray.Length; ++x)
        {

            orderArray[x] = new ShippedOrder();

            Console.Write("Enter order number: ");
            orderArray[x].orderNumber = Convert.ToInt32(Console.ReadLine());

            for (int y = 0; y < x; ++y)
            {
                check[y] = new ShippedOrder();
                if (orderArray[x].Equals(check[y]))
                    wrong = false;
                    while (!wrong)
                    {
  Console.WriteLine("Sorry, the order number {0} is a duplicate. \nPlease reenter {1}", 
  orderArray[x], check[y]);
                        for (y = 0; y < x; ++y)
                        {
                        if (orderArray[x].Equals(check[y]))
                            wrong = false;
                        }
                        check[y] = orderArray[x];
                    }
            }


            Console.Write("Enter cusomer name: ");
            orderArray[x].customerName = Console.ReadLine();

            Console.Write("Enter quanity: ");
            orderArray[x].quanityOrdered = Convert.ToInt32(Console.ReadLine());
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2 回答 2

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我会用 LINQ 来做这件事，这就是它真正发光的地方（如果这个代码不是每秒调用千次）

var arrayExpectedCount = 5;
var orderArray = new List<ShippedOrder>(); //define array of orders to generate
var check = new List<ShippedOrder>();      //array of orders already shipped,already present
...... 
//infinit interation
while(true) {
   var orderNumber = Convert.ToInt32(Console.ReadLine());
   if(!check.Exist(o=>o.orderNumber == orderNumber)
   {
      //create a new order and push it to the orderArray 
   }

   //break condition of the infinit loop
   if(orderArray.Count == arrayExpectedCount)
       break;

}

如果这不是您要的，请澄清。

于 2013-04-16T20:35:23.890 回答
0 
List<ShippedOrder> orderArray = new List<ShippedOrder>();
do {
    int newOrderNum = 0;
    // Retrieve first attempt
    Console.Write("Enter order number: ");
    newOrderNUm = Conver.ToInt32(ConsoleReadLine());
    // Check if any of the orders in orderArray have the same order number
    while(orderArray.Any(a=>a.orderNumber == newOrderNum) {
        Console.Write("Sorry, the order number is a duplicate. Please enter re-enter the order number: ");
        newOrderNum = Conver.ToInt32(ConsoleReadLine());
    };
    orderArray.Add(new ShippedOrder() {
        orderNumber = newOrderNum,
    };
} while(orderArray.Length < 5);
于 2013-04-16T20:41:12.063 回答