Console app input and output

Question

this is my simple C# console app in this i will get input from user i have postal code variable in which i want to take input as integer but when i input integer it shows error. another approch is that console.readline take both int and string as input or not ??

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;        
        ziporpostalcode =int.Parse(Console.ReadLine());          
    }
}
}

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sujith karivelil · Accepted Answer · 2016-04-13 03:51:17Z

2

you should Use int.TryParse instead for int.Parse, Which is responsible to Converts the string representation of a number to its 32-bit signed integer equivalent. A return value indicates whether the operation succeeded, else return false(conversion failed)

So your code may looks like this:

int ziporpostalcode;
if (int.TryParse(Console.ReadLine(), out ziporpostalcode))
{
    Console.WriteLine("Thank you for entering Correct ZipCode");
    // now ziporpostalcode will contains the required value
   // Proceed with the value
}
else {
    Console.WriteLine("invalid zipCode");
}
Console.ReadKey();

edited Apr 13, 2016 at 3:51

answered Apr 13, 2016 at 3:45

sujith karivelil

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Comments

M Ahmad · Accepted Answer · 2016-04-13 03:46:20Z

0

        Console.WriteLine("Enter Zip Code");
        try
        {
            ziporpostalcode = int.Parse(Console.ReadLine());
            Console.WriteLine("You Enter {0}", ziporpostalcode);
        }
        catch (Exception) {
            Console.WriteLine("Error Occured, Enter only Number");
        }

        Console.ReadLine();

answered Apr 13, 2016 at 3:46

M Ahmad

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1 Comment

ahmed shah Over a year ago

how to make it easy not using a if else condtion or exeption

sujith karivelil · Accepted Answer · 2016-04-13 07:55:18Z

0

Suggested way.

Use int.TryParse to validate your input to int.

var input =int.Parse(Console.ReadLine());    
if(int.TryParse(input, out ziporpostalcode )
{
    // you have int zipcode here
}
else
{
   // show error. 
}

edited Apr 13, 2016 at 7:55

sujith karivelil

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answered Apr 13, 2016 at 3:45

Hari Prasad

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1 Comment

Hari Prasad Over a year ago

Ahh... yes, Thanks @un-lucky. fixed now.

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