Emailer Client

Emailer

using System;
using System.Data;
using System.Configuration;
using System.Collections;
//using System.Linq;
using System.Net.Mail;
using System.Net.Mime;
using System.Text.RegularExpressions;
using System.Web;
using System.IO;
using System.Collections.Generic;

   public class Emailer
    {
        //public class EmailException : Exception
        //{
        //    public EmailException(string message) : base(message) { }
        //    public EmailException(string message, Exception innerException) : base(message, innerException) { }
        //}
        //public delegate void EmailMessageHandler(string msg);

        //public event EmailMessageHandler EmailMessage;

        public List<string> emailTo = new List<string>();
        public string emailFrom = "";
        public string emailSubject = "";
        public string emailBody = "";
        public SmtpClient SmtpCl = new SmtpClient();
        public int emailPort = 25; 

        public string[] attachments;

        private void EmailMessage(string msg)
        {
        
        }
        public void SendMessage()
        {
            try
            {
                for (int i = 0; i < emailTo.Count; i++)
                {
                    emailTo[i] = emailTo[i].ToString().Replace("}", "");
                    emailTo[i] = emailTo[i].ToString().Replace("{", "");
                    emailTo[i] = emailTo[i].ToString().Replace('"', ' ');
                    emailTo[i] = emailTo[i].ToString().Trim();
                    // validate the email address
                    bool bTest = ValidateEmailAddress(emailTo[i].ToString());
                    // if the email address is bad, return message
                    if (bTest == false)
                    {
                        EmailMessage("Invalid recipient email address: (" + emailTo[i] + ")");
                    }
                    // create the email message 
                    MailMessage message = new MailMessage(emailFrom, emailTo[i].ToString(), emailSubject, emailBody);
                    // add credentials
                    SmtpCl.Port = emailPort;
                    SmtpCl.UseDefaultCredentials = true;
                    
                    // send message
                    SmtpCl.Send(message);
                    EmailMessage("Message sent to (" + emailTo[i].ToString() + ") at (" + DateTime.Now.ToString() + ").");
                }
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message.ToString());
            }
        }


        public void SendMessageWithAttachment()
        {
            try
            {
                // validate email address
                for (int i = 0; i < emailTo.Count; i++)
                {
                    emailTo[i] = emailTo[i].ToString().Replace("}", "");
                    emailTo[i] = emailTo[i].ToString().Replace("{", "");
                    emailTo[i] = emailTo[i].ToString().Replace('"', ' ');
                    emailTo[i] = emailTo[i].ToString().Trim();
                    bool bTest = ValidateEmailAddress(emailTo[i].ToString());

                    if (bTest == false)
                    {
                        EmailMessage("Invalid recipient email address: (" + emailTo[i] + ")");
                    }
                    // Create the basic message
                    MailMessage message = new MailMessage(emailFrom, emailTo[i].ToString(), emailSubject, emailBody);

                    foreach (string attach in attachments)
                    {
                        if (File.Exists(attach))
                        {
                            Attachment attached = new Attachment(attach);
                            message.Attachments.Add(attached);
                        }
                    }
                    // Add credentials
                    SmtpCl.Port = emailPort;
                    SmtpCl.UseDefaultCredentials = true;
                    // send message
                    SmtpCl.Send(message);
                    message.Attachments.Clear();
                    message.Dispose();
                    
                    EmailMessage("Message sent to (" + emailTo[i].ToString() + ") at (" + DateTime.Now.ToString() + ").");
                }
                //return ";
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message.ToString());
            }
        }

        public bool ValidateEmailAddress(string emailAddress)
        {
            try
            {
                string TextToValidate = emailAddress;
                Regex expression = new Regex(@"\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,3}");

                // test email address with expression
                if (expression.IsMatch(TextToValidate))
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch (Exception)
            {
                EmailMessage("Invalid Email address.");
                return false;
            }
        }
    }