如何比较文本文件中数组内的字符串
本文关键字：数组 字符串 文件 文本 何比较 比较 | 更新日期: 2023-09-27 18:36:10
我正在为一个读取文本文件的ATM项目编写代码。文本文件按以下格式写入：
账号 * 姓名 * 密码 * 支票余额 * 保存余额
因此，我将其传递到将它们拆分为数组的方法中。
public void linesplitter (string line)
{
string[] split = line.Split('*');
account = int.Parse(info [0]) ;
name = info [1] ;
pin = int.Parse(info [2]) ;
check = info [3] ;
saving = info [4] ;
}
因此，当用户输入帐号时，它会进入登录屏幕，他们将在其中输入与帐号关联的名称和 PIN。
我的问题是如何将姓名和密码与帐号进行比较？
示例。
List<AccountDetails> accountDetails = new List<AccountDetails>();
//Declare class to store your info
public class AccountDetails
{
public String account { get; set; }
public String name { get; set; }
public String pin { get; set; }
public String check { get; set; }
public String saving { get; set; }
}
//This function is a just an example, you need to expand it to fit your solution
public void linesplitter(String line)
{
//You can place your text file reader code here.
//And call this function from Page_Load.
AccountDetails dtl = new AccountDetails();
string[] split = line.Split('*');
dtl.account = int.Parse(info[0]);
dtl.name = info[1];
dtl.pin = int.Parse(info[2]);
dtl.check = info[3];
dtl.saving = info[4];
//Every line from your text file will store to the Global List as declare in 1st line.
accountDetails.Add(dtl);
}
//this is the function that trigger by your Button Event.
//Pass in parameters to this function to get account details.
//So the output for this function, something like
//if(result == null)
// login fail. etc
public AccountDetails GetAccountDetails(String AccountNumber, String Name, String Pin)
{
var result = (from a in accountDetails
where a.account == AccountNumber
&& a.name == Name
&& a.pin == Pin
select a).FirstOrDefault();
return result;
}
作为一种选择，您必须将所有信息从文本文件收集到包装类实例的集合中，然后在用户输入帐号后，您按编号在集合中找到一个项目，如果存在此类项目，则期望所需的引脚和名称，进行验证检查等...
例如，您创建类：
class AccountInfo
{
public long AccountNumber { get;set; }
public int Pin { get;set; }
public string Name { get;set; }
public string Check { get;set; }
public string Saving { get;set; }
}
并将您的文本数据转换为项目集合：
var textLines = sourceTextData.Split(''r'n').ToList();
var accountsCollection = textLines.Select(i =>
new AccountInfo
{
AccountNumber = Convert.ToDouble(i.Split('*')[0]),
Pin = Int32.Parse(i.Split('*')[1]),
Name = i.Split('*')[2],
Check = i.Split('*')[3],
Saving = i.Split('*')[4]
}).ToList();
或者，您可以准备一个字典而不是列表，其中字典键将是帐号。
创建一个类来存储所有帐户信息。阅读该行时，创建该类的实例并填写信息并存储在列表中。现在要比较名称和引脚，您只需使用 Linq 查询。
Class AccountInfo
{
public int AccountNumber {get;set;}
public string Name {get;set;}
public int AtmPin {get;set;}
public string Check {get;set;}
public string Saving {get;set;}
}
// Now in your Main program, use that class like this
List<AccountInfo> accountInfoList= new List<AccountInfo>();
foreach(string line in File.ReadAllLines("filename"))
{
AccountInfo ai =new AccountInfo();
string[] split = line.Split('*');
ai.AccountNumber = int.Parse(info [0]) ;
ai.Name = info [1] ;
ai.AtmPin = int.Parse(info [2]) ;
ai.Check = info [3] ;
ai.Saving = info [4] ;
accountInfoList.Add(ai);
}
// Some code to accept name and pin from user
// Now compare name and pine like this
var validationSuccessful = accountInfoList.Any(x=>x.AccountNumber==userEnteredAccountNumber &&
x.Name==userEnteredName &&
x.AtmPin==userEnteredPin);
if(validationSuccessful)
// Display next screen
else
// Display message log in failure
请记住，这是最简单的方法。我假设你正在做一些实践项目。真正的ATM项目将具有很高的安全性，并将使用Salt和Hash机制对Pin进行比较。它肯定会有一些数据库或服务。
正如 Jannik 所建议的那样，这就是在没有 Linq 查询的情况下进行比较的方式
bool validationSuccessful=false;
foreach(AccountInfo accountInfo in AccountInfoList)
{
if(accountInfo.AccountNumber==userEnteredAccountNumber &&
accountInfo.Name==userEnteredName &&
accountInfo.AtmPin==userEnteredPin)
{
validationSuccessful = true;
break;
}
}
我希望您为帐户创建一个类，如下所示：
public class Account
{
public int account { get; set; }
public string name { get; set; }
public int pin { get; set; }
public string check { get; set; }
public string saving { get; set; }
}
然后形成一个帐户对象列表，其中包括存储帐户信息软件的文件中的所有帐户详细信息。迭代列表以检查是否有任何匹配的凭据软件可用。此完整方案的代码如下所示：
List<Account> ATMAccountList = new List<Account>();
foreach (var line in File.ReadAllLines("your Path Here"))
{
ATMAccountList.Add(linesplitter(line));
}
int accountNumberInput = 123, pinInput = 6565;
// This will be the input values from the user
bool matchFound = false;
foreach (var accountItem in ATMAccountList)
{
if (accountItem.account == accountNumberInput && accountItem.pin == pinInput)
{
matchFound = true;
break;
}
}
if (matchFound)
{
//Proceed with account
}
else
{
// display error ! in valid credential
}
其中方法linesplitter将定义为如下所示：
public Account linesplitter(string line)
{
Account AccountObject = new Account();
string[] info = line.Split('*');
AccountObject.account = int.Parse(info[0]);
AccountObject.name = info[1];
AccountObject.pin = int.Parse(info[2]);
AccountObject.check = info[3];
AccountObject.saving = info[4];
return AccountObject;
}
注意：
您可以使用 LINQ 执行相同的操作
if (ATMAccountList.Where(x => x.account == accountNumberInput && x.pin == pinInput).Count() == 1)
{
//Proceed with account
}
else
{
// display error ! in valid credentials
}
这是一个基本的控制台应用程序，可能会给你一些想法。
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Xml.Linq;
namespace ConsoleApplication1
{
class Program
{
//private static XElement AccountData = new XElement("Root");
private static DataSet dataSet = new DataSet();
static void Main(string[] args)
{
DataSet dataSet = new DataSet();
string[] readText = File.ReadAllLines(@"<Path to your account data file>'AccountData.txt");
string strAccountNumber = string.Empty;
string strPin = string.Empty;
string strName = string.Empty;
dataSet.ReadXml(new StringReader(new XElement("Root",
from str in readText
let fields = str.Split('*')
select new XElement("AccountData",
new XAttribute("AccountNo", fields[0]),
new XAttribute("Name", fields[1]),
new XAttribute("Pin", fields[2]),
new XAttribute("ChkBalance", fields[3]),
new XAttribute("SavBalance", fields[4])
)
).ToString()));
do
{
Console.WriteLine("Please enter your Account Number (press 'Q' to exit)");
strAccountNumber = Console.ReadLine().ToLower();
if (dataSet.Tables[0].Select(string.Format("AccountNo = '{0}'", strAccountNumber)).Count() == 1)
{
Console.WriteLine("Please enter your Pin");
strPin = Console.ReadLine().ToLower();
Console.WriteLine("Please enter your Name");
strName = Console.ReadLine();
if (dataSet.Tables[0].Select(string.Format("Pin = '{0}' AND Name = '{1}'", strPin, strName)).Count() == 1)
{
DataRow[] result = dataSet.Tables[0].Select(string.Format("Pin = '{0}' AND Name = '{1}'", strPin, strName));
foreach (DataRow row in result)
{
Console.WriteLine(string.Format("Account Info for :: {0}", strName));
Console.WriteLine("{0}, {1}, {2}, {3}, {4}", row[0], row[1], row[2], row[3], row[4]);
}
}
else
{
Console.WriteLine("Incorrect Details");
}
}
} while (strAccountNumber != "q");
}
}
}
不要忘记替换路径.....
string[] readText = File.ReadAllLines ....
与您的数据路径.....