Question

我创建了一个玩家类，并为我的菜单驱动的玩家系统制作了一个数组，我试图询问用户他/她是否想要更新目标，如果他们输入y让他们输入新的金额和如果没有显示消息，然后让他们更新助手并为助手做同样的事情，但是当我把n放入程序时，它一直说Exception是unhanded一个未处理的异常类型＆＃39; System.Exception＆＃39;发生在SystemPlayer.exe中。我不知道如何解决这个问题

任何帮助将不胜感激

static void ProcessUpdate(Int32 number, String firstName, String lastName, 
                          Int32 goals, Int32 assists, Player[] players, 
                          ref Int32 playerCount, Int32 MAXPLAYERS)
{

    int playerindex;//index of the player number in Array
    char answer, answer2;

    if (playerCount == 0)
    {
        Console.WriteLine("\nUpdate Player: roster is empty");
    }
    else if (playerCount < MAXPLAYERS)
    {
        number = IOConsole.GetInt32("\nUpdate Player: please enter the player's number: ");
        //number = IOConsole.GetInt32(message);
        //Console.ReadLine();
        playerindex = GetPlayerIndex(number, firstName, lastName, goals, assists, players, ref playerCount);
        if (playerindex != -1)
        {

            Console.WriteLine("\nUpdate Player: Player {0} currently has {1} goals and {2} assists \nEdit Goals?: Y/N: ", players[playerindex].Number,
                players[playerindex].Goals, players[playerindex].Assists);
            answer = Convert.ToChar(Console.ReadLine());




            if (answer.Equals('Y') || answer.Equals('y'))
            {
                goals = IOConsole.GetInt32("\nUpdate Player: please enter the player's new Goal total: ");
                if (goals < 0)
                {
                    Console.WriteLine("Goals cannot have a negative number");
                }
                else if (answer.Equals('N') || answer.Equals('n'))
                {
                    Console.WriteLine("Goals Not Updated");
                }
            }



            answer2 = IOConsole.GetChar("\nEdit Assists?: Y/N: ");


            if (answer2.Equals('Y') || answer2.Equals('y'))
            {

                assists = IOConsole.GetInt32("\nUpdate Player: please enter the player's new Assists total: ");

                if (assists < 0)
                {
                    Console.WriteLine("assists Cannot have assists negative number");
                }
                if (answer2.Equals('N') || answer2.Equals('n'))
                {
                    Console.WriteLine("Assists Not Updated");
                }
            }


            //players[playerindex].LastName = lastName;
            //players[playerindex].FirstName = firstName;
            players[playerindex].Goals = goals;
            players[playerindex].Assists = assists;
            Console.WriteLine("\n{0,7}   {1,-20}{2, -20}{3,8}{4,8}{5,8}\n", "Number", "First Name", "Last Name", "Goals", " Assists", "Points");
            Console.WriteLine("{0,7}   {1,-20}{2, -20}{3,8}{4,8}{5,8}",
             players[playerindex].Number, players[playerindex].FirstName, players[playerindex].LastName,
             players[playerindex].Goals, players[playerindex].Assists, players[playerindex].Points());
            Console.WriteLine("Sucessfully Updated!");
            Console.WriteLine();
        }


        else
            Console.WriteLine("\nUpdate Player: the player number does not exists");
    }
    else
        Console.WriteLine("\nUpdate Player: the player does not exist in the roster");
}

这是我的播放器类发生异常错误的地方

//Public Goals accessor
public Int32 Goals
{
    get
    {
        //Return member variable value
        return _goals;
    }
    set
    {
        //Validate value and throw exception if necessary
        if (value <= 0)
            throw new Exception("Goals must be a positive number");
        else
            //Otherwise set member variable value
            _goals = value;
    }
}

Answer 1

提供的代码几乎没有问题，如果您对任何问题说No，处理它的if是 INSIDE Yes声明< / p>

该属性句柄<= 0的setter，但您的代码只检查< 0

你应该有一个保存新值的变量，如果有效则将其分配给实际变量，否则如果用户输入的值小于1则会崩溃

执行此操作，再次测试是否确实解决了问题

奖励提示，请检查此String.Equals Method (String, StringComparison)以取消对Y / y和N / n的检查

在更新信息时询问用户y / n

1 个答案: