Email mask for MaskedTextBox in C#

Question

Does anyone have a ready email mask for MaskedTextBox?

e.g.

aaaa...aaa@fff.ee / aaaa...aaa@ff.ee / aaaa...aaa@fff.eee / aaaa...aaa@ff.eee /  

p.s. Please do not suggest RegEx!

Answer 1

try this

bool IsValidEmail(string email)
{
    try {
        var mail = new System.Net.Mail.MailAddress(email);
        return true;
    }
    catch {
        return false;
    }
}

Answer 2

Try this code:

    <asp:TextBox ID="txtemail" runat="server"></asp:TextBox>
    <cc1:MaskedEditExtender ID="MaskedEditExtender1" runat="server" Mask="AAAAAA@domain.com"
        InputDirection="LeftToRight" TargetControlID="txtemail">
    </cc1:MaskedEditExtender>

In mask property in place of AAAAAA you want add more AAA it's depend on your requiredment how much character to allow user to enterde.

OR

you have put like this option in textbox user can enter only character whatever you pass in mask property.

Like Below Image:

http://msdn.microsoft.com/en-us/library/system.windows.forms.maskedtextbox.mask(v=vs.90).aspxMaskedTextBox

Source

Answer 3

from: https://docs.microsoft.com/en-us/dotnet/standard/base-types/how-to-verify-that-strings-are-in-valid-email-format

    public static bool IsValidEmail(string email)
    {
         if (string.IsNullOrWhiteSpace(email))
             return false;

        try
        {
            // Normalize the domain
            email = Regex.Replace(email, @"(@)(.+)$", DomainMapper,
                                      RegexOptions.None,     TimeSpan.FromMilliseconds(200));

            // Examines the domain part of the email and normalizes it.
            string DomainMapper(Match match)
            {
                // Use IdnMapping class to convert Unicode domain names.
                var idn = new IdnMapping();

                // Pull out and process domain name (throws ArgumentException on     invalid)
                    string domainName = idn.GetAscii(match.Groups[2].Value);

                return match.Groups[1].Value + domainName;
            }
        }
        catch (RegexMatchTimeoutException e)
        {
            return false;
        }
        catch (ArgumentException e)
        {
            return false;
        }

        try
        {
            return Regex.IsMatch(email,@"^[^@\s]+@[^@\s]+\.[^@\s]+$",     RegexOptions.IgnoreCase, TimeSpan.FromMilliseconds(250));
        }
        catch (RegexMatchTimeoutException)
        {
            return false;
        }
    }