C# 将2D数组信息传递给c中的方法#

我有一个评估，我们必须在应用程序中实现方法，以2D数组存储员工信息并在屏幕上显示。到目前为止，代码可以像这样工作，但我无法找到一种方法将2D数组信息传递给交换机的案例2。当我尝试从UserInput方法返回数组信息时，或者为案例2创建方法并尝试传递数组时，它总是导致IndexOutOfRangeException。这是我的代码，提前感谢您的帮助：

using System;

namespace EmployeeFileWithMethods
{
  class Program
  {
    static void Main(string[] args)
    {
      int numberEmployees = 0;
      string[,] table = new string[numberEmployees, 4];
      string userInput = "1";
      while ( userInput != "0" )
      {

        userInput = Intro();

        switch ( userInput )
        {
          case "1":
            UserInput();
            break;
          case "2":
            Console.Clear();
            for ( int user = 0; user < table.GetLength(0); user++ )
            {
              Console.WriteLine("     User " + ( user + 1 ));
              for ( int row = 0; row < table.GetLength(1); row++ )
              {
                Console.Write(table[user, row] + "\n");
              }
              Console.WriteLine("");
            }
            break;
          case "0":
            break;
          default:
          {
            DefaultCase();
            break;
          }

        }

      }
      Console.WriteLine("Thanks for using the app!");
      Console.ReadLine();
    }
    public static string Intro()
    {
      Console.WriteLine("[-------------------------------------------------------------------------------]");
      Console.WriteLine("                        Welcome to the Edinburgh College App \n                             What would you like to do?\n                                   1:Add User\n                                   2:Show User Info\n                                   0:Exit");
      Console.WriteLine("[-------------------------------------------------------------------------------]");
      string userInput = Console.ReadLine();
      return userInput;
    }
    public static void DefaultCase()
    {
      Console.Clear();
      Console.WriteLine("[-------------------------------------------------------------------------------]");
      Console.WriteLine("              The option that you entered is invalid. Please try again.              ");
      Console.WriteLine("[-------------------------------------------------------------------------------]");
    }
    public static void UserInput()
    {
      Console.WriteLine("How many employees does your company have?");
      int numberEmployees = Convert.ToInt32(Console.ReadLine());
      string[,] table = new string[numberEmployees, 4];
      for ( int row = 0; row < numberEmployees; row++ )
      {
        Console.WriteLine("Write the Forename of user " + ( row + 1 ));
        string forename = Console.ReadLine();
        table[row, 0] = forename;
        Console.WriteLine("Write the Surname of user " + ( row + 1 ));
        string surname = Console.ReadLine();
        table[row, 1] = surname;

        while ( true )
        {
          Console.WriteLine("Write the Phone of user " + ( row + 1 ));
          string phone = Console.ReadLine();
          if ( phone.Length == 11 )
          {
            table[row, 2] = phone;
            break;
          }
          else
          {
            Console.WriteLine("Invalid Phone Number. Please Try Again");
            continue;
          }
        }
        while ( true )
        {
          Console.WriteLine("Write the Email of user " + ( row + 1 ));
          string email = Console.ReadLine();
          int charPos = email.IndexOf('@');
          if ( charPos > 0 )
          {
            table[row, 3] = email;
            break;
          }
          else
          {
            Console.WriteLine("Invalid Email. Please Try Again");
            continue;
          }
        }

      }
    }
  }

}

使用系统；
命名空间EmployeeFileWithMethods
{
班级计划
{
静态void Main（字符串[]参数）
{
int numberEmployees=0；
字符串[，]表=新字符串[numberEmployees，4]；
字符串userInput=“1”；
while（userInput！=“0”）
{
userInput=Intro（）；
开关（用户输入）
{
案例“1”：
用户输入（）；
打破
案例“2”：
Console.Clear（）；
for（int user=0；user0）
{
表[第3行]=电子邮件；
打破
}
其他的
{
Console.WriteLine（“无效电子邮件，请重试”）；
继续；
}
}
}
}
}
}

我无法重现异常，但是

UserInput

不返回任何内容，并且在返回时，在此方法中初始化的表将丢失。因此，

Main

中的表的第一个dim的大小为0。应通过ref将表作为参数传递，并删除方法中的表声明：

UserInput(table);

public static void UserInput(ref string[,] table)

但您需要调整此数组的大小以添加新的输入

一种更好、更简单、更健壮、更干净的方法是使用类实体的列表。下面是经过修改和改进的代码，用于使用员工实体的列表。我对代码做了最低限度的修改，但可以进一步改进和重构，尤其是

while

循环，您还可以使用

int.TryParse

来增加员工数量

using System.Collections.Generic;

static private void Main（）
{
var employees=新列表（）；
字符串userInput=“1”；
while（userInput！=“0”）
{
userInput=Intro（）；
开关（用户输入）
{
案例“1”：
用户输入（员工）；
打破
案例“2”：
Console.Clear（）；
对于（int index=0；index

publicstaticvoiduserinput（列出员工）
{
Console.WriteLine（“贵公司有多少员工？”）；
int countEmployees=employees.Count；
int countEmployeesNew=Convert.ToInt3
public class Employee
{
  public string Forename { get; set; }
  public string Surname { get; set; }
  public string Phone { get; set; }
  public string Email { get; set; }
}

static private void Main()
{
  var employees = new List<Employee>();
  string userInput = "1";
  while ( userInput != "0" )
  {
    userInput = Intro();
    switch ( userInput )
    {
      case "1":
        UserInput(employees);
        break;
      case "2":
        Console.Clear();
        for ( int index = 0; index < employees.Count; index++ )
        {
          Console.WriteLine("     User " + ( index + 1 ));
          Console.WriteLine("         Forename: " + employees[index].Forename);
          Console.WriteLine("         Surname: " + employees[index].Surname);
          Console.WriteLine("         Phone: " + employees[index].Phone);
          Console.WriteLine("         eMail: " + employees[index].Email);
          Console.WriteLine("");
        }
        break;
      case "0":
        break;
      default:
      {
        DefaultCase();
        break;
      }

    }

  }
  Console.WriteLine("Thanks for using the app!");
  Console.ReadLine();
}

public static void UserInput(List<Employee> employees)
{
  Console.WriteLine("How many employees does your company have?");
  int countEmployees = employees.Count;
  int countEmployeesNew = Convert.ToInt32(Console.ReadLine());
  for ( int indexEmployeeNew = 0; indexEmployeeNew < countEmployeesNew; indexEmployeeNew++ )
  {
    int posEmployeeNew = countEmployees + indexEmployeeNew + 1;
    Console.WriteLine("Write the Forename of user " + posEmployeeNew);
    string forename = Console.ReadLine();
    Console.WriteLine("Write the Surname of user " + posEmployeeNew);
    string surname = Console.ReadLine();
    string phone = "";
    while ( true )
    {
      Console.WriteLine("Write the Phone of user " + posEmployeeNew);
      phone = Console.ReadLine();
      if ( phone.Length == 11 ) break;
      Console.WriteLine("Invalid Phone Number. Please Try Again");
    }
    string email = "";
    while ( true )
    {
      Console.WriteLine("Write the Email of user " + posEmployeeNew);
      email = Console.ReadLine();
      int charPos = email.IndexOf('@');
      if ( charPos > 0 ) break;
      Console.WriteLine("Invalid Email. Please Try Again");
    }
    employees.Add(new Employee
    {
      Forename = forename,
      Surname = surname,
      Phone = phone,
      Email = email
    });
  }
}