c# - 输入字符串的格式不正确 C#

Question

好吧，我对编程非常陌生，所以很可能这是一个非常简单的修复，但出于某种原因，我收到了一个Input string was not in a correct format error。当我尝试将文件中的字符串值解析为 double 时，我非常确定输入的字符串绝对是一个可以解析为 double 的数字。奇怪的是，我检查了数组，所有信息都完美地放入了数组。所以我真的不明白为什么会出现此错误。

这是我从中获取错误的方法的代码:

我在 LoadArray() 方法中收到错误 Input string was not in a correct format 在 annualInterestRate = Double.Parse(fields [0]);。

这是我在输入文件中以相同格式获得的信息:

.015 20000 w8v6754r6 Jacobs,Michael
.045 60000 w4fg55566 Ray,Bill
.035 40000 w6gyhygg7 Nichols,Luke
.018 25000 w5g55g777 Hendricks,Gary

该类的其余代码只是以防万一，但实际上问题最有可能出在 LoadArray() 方法中。提前致谢!

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace SavingsAccount
{
    class Driver
    {
        public static void LoadArray(SavingsAccount [ ] array)
        {
            string accountHolder = " ";
            string accountNumber = " ";
            double annualInterestRate = 0.0;
            double savingsBalance = 0.0;
            int i = 0;


            StreamReader inFile = new StreamReader("accountdata.txt");

            SavingsAccount account1 = new SavingsAccount();

            //set to default constructor
            for (int j = 0; j < array.Length; j++)
                array[j] = new SavingsAccount();

            while (!inFile.EndOfStream)
            {


                //input file
                string[] fields = inFile.ReadLine().Trim().Split(' ');
                annualInterestRate = Double.Parse(fields[0]);
                savingsBalance = Double.Parse(fields[1]);
                accountNumber = fields[2];
                accountHolder = fields[3];


                //annualInterestRate = Double.Parse(inFile.ReadLine());
                //savingsBalance = Double.Parse(inFile.ReadLine());
                //accountNumber = inFile.ReadLine();
                //accountHolder = inFile.ReadLine();


                //set info from input file
                account1.setAccountNumber(accountNumber);
                account1.setAccountHolder(accountHolder);
                account1.ModifyInterestRate(annualInterestRate);
                account1.ModifySavingsBalance(savingsBalance);

                array[i] = new SavingsAccount(annualInterestRate, savingsBalance, accountNumber, accountHolder);
                i++;




            }//end while
            inFile.Close();
        }//end method

        public static void SavingsReport( SavingsAccount [ ] array)
        {
            SavingsAccount account1 = new SavingsAccount();
            Console.WriteLine("------------------------Savings Report-----------------------------");
            Console.WriteLine("Interest Rate   Savings Balance    Account Number    Account Holder");
            Console.WriteLine("-------------------------------------------------------------------");
            for (int i = 0; i < array.Length; i++)
            {

                Console.WriteLine(account1.ToString());
            }

            Console.WriteLine("-------------------------------------------------------------------");
            Console.WriteLine();
            //use array as parameter
        }

        public static void StoreAccounts( SavingsAccount [ ] array)
        {
            SavingsAccount account1 = new SavingsAccount();
            StreamWriter outFile = new StreamWriter(@"C:\Users\Juan D Sanchez\Desktop\accountholderdata.txt");
            //use array as parameter
            outFile.WriteLine("------------------------Savings Report-----------------------------");
            outFile.WriteLine("Interest Rate   Savings Balance    Account Number    Account Holder");
            outFile.WriteLine("-------------------------------------------------------------------");
            for (int i = 0; i < array.Length; i++)
            {
                outFile.WriteLine(account1.ToString());
            }

            outFile.WriteLine("-------------------------------------------------------------------");
            outFile.WriteLine();

        }

        static void Main(string[] args)
        {


            SavingsAccount[] Accounts = new SavingsAccount[100];

            LoadArray(Accounts);

            SavingsReport(Accounts);

            StoreAccounts(Accounts);



            //for (int i = 0; i < Accounts.Length; i++)
            //{

            //}
            //exits the program after the user enters any key
            Console.WriteLine("Press any key to close.....");
            Console.ReadKey();

        }//end main

    }//end class
}

Answer 1

检查您的文件并确保末尾没有空行。还要确保字段已正确填充。

我会在您遇到错误的那一行添加断点，然后逐行查看正在传递的数据。

希望对您有所帮助。