Check whether an email address is valid or not ?

Some times, we require some common function like Get Random GUID, or some validations like passowrd is strong or not.

So, here i show you the validation of Email address field that checks whether the entered email address is valid or not ?


I have created a function "CheckEmail", which accepts the EmailAddress imput as an parameter.
You have to pass your input Emailaddress value to this function and this function will return you a boolean (true/false), if the entered email address is valid then it will return true until false.

    //<param name="emailAddress">Your Email Address</param>

    public static bool CheckEmail(string emailAddress)

    {

        bool isValid = true;

        if (string.IsNullOrWhiteSpace(emailAddress.Trim()))

        {

            isValid = false;

        }

        else

        {

            RegexStringValidator re = new RegexStringValidator(@"^[a-zA-Z0-9][-\w\.]*@([a-zA-Z0-9][\w\-]*\.)+[a-zA-Z]{2,3}$");

            try

            {

                re.Validate(emailAddress);

            }

            catch

            {

                isValid = false;

            }

        }

        return isValid;

    }

    

    For RegexStringValidator class, you have to add this namespace

using System.Configuration