C# cosole app console readline error

Question

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how to read input as integer in console.readline my data type is int .. or how to take string and int in console.readline..
seee my postal code it show error when i input

What I have tried:

C#

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

namespace ConsoleApplication1
{
    class Program
    {
      

        static void Main(string[] args)
        {
            string firstname;
            string lastname;
            string birthdate;
            string addressline1;
            string adressline2;
            string city;
            string stateorprovince;
            int    ziporpostalcode;
            string country;

            Console.WriteLine("enter your first name");
            firstname = Console.ReadLine();
            Console.WriteLine("enter last name");
           lastname = Console.ReadLine();
            Console.WriteLine("brithdate");
            birthdate =Console.ReadLine();
            Console.WriteLine("address line 1");

           addressline1 = Console.ReadLine();
            Console.WriteLine("addres line 2");
            adressline2= Console.ReadLine();
            Console.WriteLine("city");
            city = Console.ReadLine();
            Console.WriteLine("state/province");
            stateorprovince = Console.ReadLine();
            Console.WriteLine("zip or postal code");
            ziporpostalcode =int.Parse(Console.ReadLine());
            Console.WriteLine("country");
            country = Console.ReadLine();
        }
    }
}

Posted 12-Apr-16 17:28pm

Ahmed Shah

Updated 12-Apr-16 19:34pm

PIEBALDconsult

v2

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Comments

PIEBALDconsult 13-Apr-16 0:10am

I would store the string from the Readline and then use int.TryParse afterward. Don't try to do both at once.
https://msdn.microsoft.com/en-us/library/f02979c7(v=vs.110).aspx

3 solutions

Solution 1

Hi,

Try below code.

C#

ziporpostalcode =Convert.ToInt32(Console.ReadLine());

Thanks,
Raghuveer

Posted 12-Apr-16 17:54pm

Raghuveer Kasyap

Comments

PIEBALDconsult 13-Apr-16 0:07am

All that does is call int.Parse which he already says he tried.
In general, don't use Convert, when there's a more direct option.

Ahmed Shah 14-Apr-16 10:52am

direct like parse

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Karthik_Mahalingam · Accepted Answer · 2016-04-12T18:37:00

try this

C#

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

namespace ConsoleApplication1
{
    class Program
    {


        static void Main(string[] args)
        { 
            int ziporpostalcode;            
            Console.WriteLine("zip or postal code");
            ziporpostalcode = GetZipCode();
          
        }

        private static int GetZipCode()
        {
            int ziporpostalcode;
            here:
            string zip = Console.ReadLine();
            if (!int.TryParse(zip, out ziporpostalcode))
            {
                Console.WriteLine("Please enter a valid zip code");
                goto here;
            }
            return ziporpostalcode;
        }
    }
}

VijayRana · Accepted Answer · 2016-04-12T19:34:00

use TryParse, if you will enter int then it will convert as it is, but if you will enter string in zip code it will give you 0.

C#

static void Main(string[] args)
       {

           string firstname;
           string lastname;
           string birthdate;
           string addressline1;
           string adressline2;
           string city;
           string stateorprovince;
           int ziporpostalcode;
           string country;

           Console.WriteLine("enter your first name");
           firstname = Console.ReadLine();
           Console.WriteLine("enter last name");
           lastname = Console.ReadLine();
           Console.WriteLine("brithdate");
           birthdate = Console.ReadLine();
           Console.WriteLine("address line 1");

           addressline1 = Console.ReadLine();
           Console.WriteLine("addres line 2");
           adressline2 = Console.ReadLine();
           Console.WriteLine("city");
           city = Console.ReadLine();
           Console.WriteLine("state/province");
           stateorprovince = Console.ReadLine();
           Console.WriteLine("zip or postal code");
            Int32.TryParse(Console.ReadLine(), out ziporpostalcode);
           Console.WriteLine("country");
           country = Console.ReadLine();

       }

C# cosole app console readline error

3 solutions

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