Question

Need help with code in C#

Create an application that reads a file named Accounts.txt. Your application should load the file and display back the results.

The application should allow the user to enter additional entries and save them back to the same file.

The CSV file should contain the following fields:

AccountName, InvoiceDate, DueDate, AmountDue

If the CSV file contains invalid data you want to inform the user which row contained bad data.

Below is an example of what the output should look like; however, it does not need to match the output exactly.

Row 1: AccountName: John Smith. InvoiceDate: 1/1/2017. Due Date: 1/31/2017. AmountDue: $1000.00
...
Row 4: AccountName: Titan Industries. Invoice Date: 1/31/2017. Due Date: 2/28/2017. AmountDue: 1897.50

Would you like to enter additional data?
Please enter the Account Name: {UserInput}
Please enter the Invoice Date: {UserInput}
Please enter the Due Date: {UserInput}
Please enter the AmountDue: {UserInput}

Your data has been saved

You only need to allow the user to enter in one row per execution of the program. Make sure to validate the user input. Be sure to catch if the user enters an invalid date (hint: use the TryParse() function for both dates and decimals)

Make sure to use good object-oriented design principles (i.e., create separate classes for separate purposes, etc.).

Answer 1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
namespace ConsoleApplication8
{
class r
{
public void fileread()
{
try
{
string s = File.ReadAllText("e:\\Accounts.txt");
string[] s1 = s.Split('\n');
Console.WriteLine(" Account Name,Invoice Date, Due Date,Amount due");
int i = 1;
foreach (string ss in s1)
{
Console.WriteLine("Row " + i.ToString() + " " + ss);
i++;
}
}
catch (Exception e1)
{
Console.WriteLine(e1.Message.ToString());
}
}

}
class w
{
public void filewrite()
{
// Regex r = new Regex();
  
string name, invoicedate, duedate,dueamt;
  
  
string a = "y";
while (a == "y")
{
Console.WriteLine("Enter Name");

name = Console.ReadLine();
if(Regex.IsMatch (name,@"[A-Z,a-z]+$"))
{
}
else
{
Console.WriteLine("Not a valid Name,Press enter to exit");
Console.ReadLine();
Environment.Exit(0);

}
Console.WriteLine("Enter Invoice Date(2 digits for month/2 digits for day/4 digits for year)");
invoicedate = Console.ReadLine();
  
if (Regex.IsMatch(invoicedate, @"^\d{2}/\d{2}/\d{4}$"))
{
}
else
{
Console.WriteLine("Invalid Date,press Enter to exit");
Console.ReadLine();
Environment.Exit(0);

}
Console.WriteLine("Enter Due Date(2 digits for month/2 digits for day/4 digits for year)");

duedate = Console.ReadLine();
if (Regex.IsMatch(duedate, @"^\d{2}/\d{2}/\d{4}$"))
{
}
else
{
Console.WriteLine("Invalid Date,press Enter to exit");
Console.ReadLine();
Environment.Exit(0);

}

Console.WriteLine("Enter Due Amount(After decimal only 2 digits are allowed");
dueamt = Console.ReadLine();
if (Regex.IsMatch(dueamt, @"^\d*.\d{0,2}$"))
{
dueamt = "$"+dueamt;
}
else
{
Console.WriteLine("Invalid amount,press Enter to exit");
Console.ReadLine();

Environment.Exit(0);
  
  

}

  

  

  
  

string newcontent = name + "," + invoicedate + "," + duedate + "," + dueamt.ToString();
File.AppendAllText("e:\\Accounts.txt", newcontent + Environment.NewLine);
//File.AppendAllText("e:\\Accounts.txt", );
Console.WriteLine("Do you want to Add more record?(y/n)");
a = Console.ReadLine();
}
  
}
}

class Program
{
static void Main(string[] args)
{
  
char a = 'y';
r o=new r();
o.fileread();
w ow = new w();
ow.filewrite();
Console.ReadKey();

}
}
}