学步园

      以下方法结合System.Net.Mail命名空间下的smtp类以及moss中传出电子邮件设置进行邮件的发送.
1.发送邮件主方法

public bool SendMail(string fromAdd, string[] toAdd, string subject, string body, string[] fileName)
{
            MailMessage mailMessage = new MailMessage();
            mailMessage.From = new MailAddress(fromAdd);
            for (int i = 0; i < toAdd.Length; i++)
            {
                if (toAdd[i].Trim() != string.Empty)
                {
                    mailMessage.To.Add(new MailAddress(toAdd[i]));
                }
            }
            mailMessage.Priority = MailPriority.High;
            mailMessage.IsBodyHtml = true;
            mailMessage.Subject = subject;
            mailMessage.Body = body;

            if (fileName != null)
            {
                for (int i = 0; i < fileName.Length; i++) 
                {
                    string filePath = HttpContext.Current.Server.MapPath("~/wpresources/OAContactsManage/upload/") + fileName[i].ToString();
                    mailMessage.Attachments.Add(new Attachment(filePath));
                }
            }
            try
            {
                  //通过对象模型取得moss配置的smtp服务器
                SPOutboundMailServiceInstance smtpServer = SPContext.Current.Site.WebApplication.OutboundMailServiceInstance;                
                System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient(smtpServer.Server.Address);                
                smtp.Send(mailMessage);
            }
            catch (Exception ex)
            {
                return false;
            }
            finally
            {
                foreach (Attachment item in mailMessage.Attachments)
                {
                    item.Dispose();   //一定要释放该对象,否则无法删除附件
                }
                DeleteFile(fileName);    //不论邮件是否发送成功，删除服务器上临时附件                
            }
            return true;
        }

2.邮件发送完毕后删除临时文件夹中的附件

public void DeleteFile(string[] fileName)
{
            try
            {
                //下面两种方式都可以达到删除文件的目的
                //string path = string.Empty;
                //FileInfo fi = null;
                //for (int i = 0; i < fileName.Length; i++)
                //{
                //    if (fileName[i].Trim() != "")
                //    {
                //        path = HttpContext.Current.Server.MapPath("~/wpresources/OAContactsManage/upload/") + fileName[i].ToString();
                //        fi = new FileInfo(path);
                //        if (fi.Exists)
                //        {                            
                //            fi.Delete();
                //        }
                //    }
                //}

                for (int i = 0; i < fileName.Length; i++)
                {
                    if (!fileName[i].Equals(string.Empty))
                    {
                        string path = HttpContext.Current.Server.MapPath("/") + "\\wpresources\\OAContactsManage\\upload\\" + fileName[i].ToString();
                        if (File.Exists(path))
                        {
                            File.Delete(path);
                        }
                    }
                }
            }
            catch
            {
                
            }