How to find User and Host from an email address (string not MailAddress)

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I need to find the Host Name and Username from a given email address.
I'm writing a library/control set to upload if I can finish this task.
Here's an example of what I need to find:
Say we have my email: shelby.p67@gmail.com
The '@' symbol seperates the the user 'shelby.p67' from the host name 'gmail.com'.
Problem:
I'm building a class for a control and don't want to use System.Net.Mail.MailAddress class that the .Net framework provides. Third party libraries won't do because this is a matter of me just not knowing RegularExpressions aswell as I thought.

Posted 12-Sep-13 16:52pm

shelby67

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shelby67 · Answer 1 · 2013-09-12T17:35:00

I think this works, not 100% sure.

C#

public string Address
        {
            get
            {
                if (_user != null && _host != null)
                    return _user + "@" + _host;
                else
                    return _address;
            }
            set
            {
                _address = value;
                if (IsValidEmail(_address))
                {
                    int atIndex = _address.IndexOf('@');
                    _user = _address.ToString().Substring(0,atIndex);
                    _host = _address.ToString().Substring(atIndex, _address.Length - atIndex);
                }
                else
                    _user = _host = null;
            }
        }