Question

我目前正在学习C＃，并且我试图了解类继承，并编写了一些代码来向控制台显示一行，但我遇到了错误的问题。这个帖子主题。

它在string.format行的子类PC中抛出错误。我假设它与我传递的类型有关，但到目前为止我尝试的所有东西都没有用。我非常感激任何意见，因为我希望在进入下一阶段培训之前确保完全理解这一点。

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

namespace ClassInheritance
{
    class Program
    {
    static void Main(string[] args)
    {
        PC myPC = new PC();

        myPC.casetype = "Black SuperCool";
        myPC.contract = true;
        myPC.dateadded = DateTime.Now;
        myPC.id = 1;
        myPC.type = "Small form factor";
        printEquipmentDetails(myPC);

        Console.ReadLine();
    }

    private static void printEquipmentDetails(Equipment Equipment)
    {
        Console.WriteLine("Details: {0}", Equipment.DisplayEquipment());
    }
}

abstract class Equipment
{
    public int id { get; set; }
    public string type { get; set; }
    public bool contract { get; set; }
    public DateTime dateadded { get; set; }

    public abstract string DisplayEquipment();
}

class PC : Equipment
{
    public string casetype { get; set; }

    public override string DisplayEquipment()
    {
        return String.Format("(0} - {1} - {2} - {3} - {4}", this.id, this.type, this.contract.ToString(), this.dateadded.ToShortDateString(), this.casetype);
    }
}

class Laptop : Equipment
{
    public string batterylife { get; set; }

    public override string DisplayEquipment()
    {
        return String.Format("(0} - {1} - {2} - {3} - {4}", this.id, this.type, this.contract, this.dateadded, this.batterylife);
    }
}
}

Answer 1

将(替换为{ （ return String.Format("行中的0} - {1} - {2} - {3} - {4}"...。

所以
return String.Format(" （ 0} - {1} - {2} - {3} - {4}"...˙将是return String.Format(" { { {1}}

“System.FormatException”类型的未处理异常输入字符串的格式不正确

1 个答案: