C#でメール送信する関数(SMTP使用)

C#の中でSMTPサーバーを通じてメールを送って、いくつかのよく使う関数

/*=============================================================
 * Send Mail Helper
 * Author ： Danny,Li
 * E-mail ： [email protected]
 * Edition： V-101014
 *=============================================================*/
using System;
using System.Collections.Generic;
using System.Text;

namespace IRCommon
{
    public class MailHelper
    {
        #region  web.config         
        //SMTP   
        public static string MailSmtpServer
        {
            get { return System.Configuration.ConfigurationManager.AppSettings["mailSmtpServer"]; }
        }

        //      
        public static string MailServerFrom
        {
            get { return System.Configuration.ConfigurationManager.AppSettings["MailServerFrom"]; }
        }

        //         
        public static string DebugMail
        {
            get
            {
                if (string.IsNullOrEmpty(System.Configuration.ConfigurationManager.AppSettings["debugMail"]))
                    return string.Empty;
                else
                    return System.Configuration.ConfigurationManager.AppSettings["debugMail"];
            }
        }
        #endregion

        /// <summary>
        ///       ，       
        /// </summary>
        private MailHelper()
        {
            // TODO: Add constructor logic here
        }

        /// <summary>
        /// SendNetMail(   SMTP     )(     、   、      ";"  ,       ";")
        /// </summary>
        /// <param name="mailFrom">   </param>
        /// <param name="mailTo">   (      "；"  ，       "；")</param>
        /// <param name="mailSubject">  </param>
        /// <param name="mailBody">  </param>
        /// <param name="mailAttch">  （     "；"  ，       "；"）</param>
        /// <param name="mailCode">  （     ）</param>
        /// <param name="mailPriority">   </param>
        /// <param name="mailCC">  (      "；"  ，       "；")</param>
        /// <param name="resultMessage">    </param>
        public static void SendNetMail(string mailFrom, string mailTo, string mailSubject, string mailBody, string mailAttch, string mailCode, string mailPriority, string mailCC, out string resultMessage)
        {
            //       
            resultMessage = "";
            //          
            if (string.IsNullOrEmpty(mailFrom) || string.IsNullOrEmpty(mailTo))
            {
                resultMessage = "Please Fill Email Addresser Or Addressee . ";
                return;
            }

            System.Net.Mail.MailMessage email = new System.Net.Mail.MailMessage();
            System.Net.Mail.MailAddress emailFrom = new System.Net.Mail.MailAddress(mailFrom);
            //   
            email.From = emailFrom;
            //   
            if (string.IsNullOrEmpty(DebugMail))
            {
                string[] toUsers = mailTo.Split(';');
                foreach (string to in toUsers)
                    email.To.Add(to);
            }
            else
            {
                email.To.Add(DebugMail);
                mailSubject += "(MailTo " + mailTo + ")";
            }
            //  
            if (string.IsNullOrEmpty(DebugMail))
            {
                if (!string.IsNullOrEmpty(mailCC))
                {
                    string[] ccUsers = mailCC.Split(';');
                    foreach (string cc in ccUsers)
                        email.CC.Add(cc);
                }
            }
            else
            {
                if (!string.IsNullOrEmpty(mailCC))
                    mailSubject += "(MailCC " + mailCC + ")";
            }
            //  
            email.Subject = mailSubject;
            //  
            email.Body = mailBody;
            //  
            if (!string.IsNullOrEmpty(mailAttch))
            {
                string[] attachments = mailAttch.Split(';');
                foreach (string file in attachments)
                {
                    System.Net.Mail.Attachment attach = new System.Net.Mail.Attachment(file, System.Net.Mime.MediaTypeNames.Application.Octet);
                    //         
                    System.Net.Mime.ContentDisposition disposition = attach.ContentDisposition;
                    disposition.CreationDate = System.IO.File.GetCreationTime(file);
                    disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
                    disposition.ReadDate = System.IO.File.GetLastAccessTime(file);
                    //    
                    email.Attachments.Add(attach);
                }
            }
            //   
            email.Priority = (mailPriority == "High") ? System.Net.Mail.MailPriority.High : System.Net.Mail.MailPriority.Normal;
            //    、  
            email.BodyEncoding = System.Text.Encoding.UTF8;
            email.IsBodyHtml = true;
            //SMTP   
            System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient(MailSmtpServer);

            //  （Credentials   ）
            client.Credentials = new System.Net.NetworkCredential(mailFrom, mailCode);

            //             (Delivery   ,  )
            client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;

            try
            {
                //    
                client.Send(email);
                resultMessage = "Your E-mail Send Success .";
            }
            catch (Exception ex)
            {
                resultMessage = "Your E-mail Send Faile And Bring Error :" + ex.Message;
            }
        }

        /// <summary>
        /// SendNetMail（     ）（     、   、      ";"  ,       ";"）
        /// web.config    (   <system.web>        )：
        /// <system.net>
        ///     <mailSettings>
        ///            <smtp from="[email protected]">
        ///                <network host="smtp.163.com" password="a1984c11d13" userName="yangxiangwen789" />
        ///         </smtp>
        ///     </mailSettings>
        /// </system.net>
        /// </summary>
        /// <param name="mailFrom">   </param>
        /// <param name="mailTo">   (      "；"  ，       "；")</param>
        /// <param name="mailSubject">  </param>
        /// <param name="mailBody">  </param>
        /// <param name="mailAttch">  （     "；"  ，       "；"）</param>
        /// <param name="mailPriority">   </param>
        /// <param name="mailCC">  (      "；"  ，       "；")</param>
        /// <param name="resultMessage">    </param>
        public static void SendNetMail(string mailFrom, string mailTo, string mailSubject, string mailBody, string mailAttch, string mailPriority, string mailCC, out string resultMessage)
        {
            //       
            resultMessage = "";
            //          
            if (string.IsNullOrEmpty(mailFrom) || string.IsNullOrEmpty(mailTo))
            {
                resultMessage = "Please Fill Email Addresser Or Addressee . ";
                return;
            }

            System.Net.Mail.MailMessage email = new System.Net.Mail.MailMessage();

            //   
            email.From = new System.Net.Mail.MailAddress(mailFrom);
            //   
            if (string.IsNullOrEmpty(DebugMail))
            {
                string[] toUsers = mailTo.Split(';');
                foreach (string to in toUsers)
                    email.To.Add(to);
            }
            else
            {
                email.To.Add(DebugMail);
                mailSubject += "(MailTo " + mailTo + ")";
            }
            //  
            if (string.IsNullOrEmpty(DebugMail))
            {
                if (!string.IsNullOrEmpty(mailCC))
                {
                    string[] ccUsers = mailCC.Split(';');
                    foreach (string cc in ccUsers)
                        email.CC.Add(cc);
                }
            }
            else
            {
                if (!string.IsNullOrEmpty(mailCC))
                    mailSubject += "(MailCC " + mailCC + ")";
            }
            //  
            email.Subject = mailSubject;
            //  
            email.Body = mailBody;
            //   
            email.Priority = (mailPriority == "High") ? System.Net.Mail.MailPriority.High : System.Net.Mail.MailPriority.Normal;
            //  
            if (!string.IsNullOrEmpty(mailAttch))
            {
                string[] attachments = mailAttch.Split(';');
                foreach (string file in attachments)
                {
                    System.Net.Mail.Attachment attach = new System.Net.Mail.Attachment(file, System.Net.Mime.MediaTypeNames.Application.Octet);
                    //         
                    System.Net.Mime.ContentDisposition disposition = attach.ContentDisposition;
                    disposition.CreationDate = System.IO.File.GetCreationTime(file);
                    disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
                    disposition.ReadDate = System.IO.File.GetLastAccessTime(file);
                    //    
                    email.Attachments.Add(attach);
                }
            }
            //    
            email.BodyEncoding = System.Text.Encoding.UTF8;
            email.IsBodyHtml = true;

            System.Net.Mail.SmtpClient sc = new System.Net.Mail.SmtpClient();
            try
            {
                //    
                sc.Send(email);
                resultMessage = "Your E-mail Send Success .";
            }
            catch (Exception ex)
            {
                resultMessage = "Your E-mail Send Faile And Bring Error :" + ex.Message;
            }
        }

    }
}