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Check if email is a valid one

C# - Wendler November 11, 2015
0 Ratings 0/5

Sprache: C#

This code check if the email is a valid email-adress. To use this you need: System.Text.RegularExpressions
using System;
using System.Text.RegularExpressions;

namespace Snippet2
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Please write your email-adress here: ");
            string email = Console.ReadLine();
            
            isEmailValid(email);

            Console.WriteLine(isEmailValid(email));
            Console.ReadLine();
        }

        //check if email is valid
        public static bool isEmailValid(string email)
        {
            return Regex.IsMatch(email, @"^([0-9a-zA-Z]([-.w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-w]*[0-9a-zA-Z].)+[a-zA-Z]{2,9})$");
        }
    }
}
using System;
using System.Text.RegularExpressions;

namespace Snippet2
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Please write your email-adress here: ");
            string email = Console.ReadLine();
            
            isEmailValid(email);

            Console.WriteLine(isEmailValid(email));
            Console.ReadLine();
        }

        //check if email is valid
        public static bool isEmailValid(string email)
        {
            return Regex.IsMatch(email, @"^([0-9a-zA-Z]([-.w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-w]*[0-9a-zA-Z].)+[a-zA-Z]{2,9})$");
        }
    }
}
Abgelegt unter check Email regex regualexpressions validEmail

Alte URL: /snippet/check-if-email-is-a-valid-one/12045

1 Kommentar

  1. Hier werden viele Emailadressen als nicht valid markiert, obwohl sie gültig sind.

    Mit Bordmitteln kann man das so machen:
    [code]using System.ComponentModel.DataAnnotations;

    var valid = new EmailAddressAttribute();
    if (valid.IsValid(email)) …[/code]