求高人指导邮件管理系统（C#）。。。

Question

现在需要做一个邮件管理系统（C#）不知道怎么下手。。求指导！

Answer 1

public class GlbMail
{
/// <summary>
        /// 检测附件大小
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        private bool Attachment_MaiInit(string path)
        {
            FileStream FileStream_my = null; //附件文件流
            try
            {
                FileStream_my = new FileStream(path, FileMode.Open);
                string name = FileStream_my.Name;
                int size = (int)(FileStream_my.Length / 1024/1024);
                FileStream_my.Close();
                //控制文件大小不大于2Ｍ
                if (size > 2)
                {
                    MessageBox.Show("文件长度不能大于2M！你选择的文件大小为"+ size.ToString()+"M","警告",MessageBoxButtons.OK,MessageBoxIcon.Warning);
                    return false;
                }
            
                return true;
            }
            catch (IOException E)
            {
                MessageBox.Show(E.Message);
                return false;
            }
        }
        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="i_EmailInfo"></param>
        /// <param name="errorMsg"></param>
        public void Send(EmailInfoModel i_EmailInfo,out string errorMsg)
        {
            //代码
            SmtpClient smtpClient = null;   //设置SMTP协议
            MailAddress mailAddr_from = null; //设置发信人地址  当然还需要密码
            MailAddress mailAddr_to = null;  //设置收信人地址  不需要密码
            MailMessage MailMessage_Mai = null;
            errorMsg = string.Empty;
            if (i_EmailInfo.SmtpServer == "")
            {
                errorMsg = "SMTP服务器名不能为空";
                return;
            }
            if (i_EmailInfo.SendEmail1 == "")
            {
                errorMsg = "发件人邮箱地址不能为空";
                return;
            }
            if (i_EmailInfo.SendEailPass == "")
            {
                errorMsg = "发件人邮箱密码不能为空";
                return;
            }
            if (i_EmailInfo.ReceiveEmail1 == "")
            {
                errorMsg = "加收件人不能为空";
                return;
            }
            try
            {
                //初始化Smtp服务器信息
                smtpClient = new SmtpClient();
                smtpClient.Host = "smtp.qq.com";//邮件服务器地址
                smtpClient.Port = i_EmailInfo.Port;
                smtpClient.UseDefaultCredentials = true;
                smtpClient.EnableSsl = false;
                smtpClient.Credentials = new System.Net.NetworkCredential(i_EmailInfo.SendEmail1, i_EmailInfo.SendEailPass); //指定登录服务器的用户名和密码
            }
            catch (Exception e)
            {
                errorMsg = "邮件发送失败,请确定SMTP服务名是否正确！" + "\n" + "技术信息:\n" + e.Message;
                return;
            }
            MailMessage_Mai = new MailMessage();
            mailAddr_from = new MailAddress(i_EmailInfo.SendEmail1);
            mailAddr_to = new MailAddress(i_EmailInfo.ReceiveEmail1);
            //清空历史发送信息 以防发送时收件人收到的错误信息(收件人列表会不断重复)
            MailMessage_Mai.To.Clear();
            //添加收件人邮箱地址
            MailMessage_Mai.To.Add(mailAddr_to);
            //设置发件人邮箱
            MailMessage_Mai.From = mailAddr_from;
            //邮件主题
            MailMessage_Mai.Subject = i_EmailInfo.Title;
            //主题编码格式
            MailMessage_Mai.SubjectEncoding = System.Text.Encoding.UTF8;
            //邮件正文
            MailMessage_Mai.Body = i_EmailInfo.Message;
            //正文编码格式
            MailMessage_Mai.BodyEncoding = System.Text.Encoding.UTF8;
            //清空历史附件  以防附件重复发送
            MailMessage_Mai.Attachments.Clear();
            //添加附件
            //检测附件大小 发件必需小于10M 否则返回  不会执行以下代码
            if (i_EmailInfo.FilePaht != "")
            {
                if (Attachment_MaiInit(i_EmailInfo.FilePaht.Trim()))
                {
                    MailMessage_Mai.Attachments.Add(new Attachment(i_EmailInfo.FilePaht, MediaTypeNames.Application.Octet));
                }
            }
            //注册邮件发送完毕后的处理事件
            //smtpClient.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
            smtpClient.SendCompleted +=new SendCompletedEventHandler(smtpClient_SendCompleted);
            //开始发送邮件
            smtpClient.SendAsync(MailMessage_Mai, "000000000");
        }
        /// <summary>
        /// 发信结束后委托
        /// </summary>
        public SendCompletedEventHandler smtpClient_SendCompleted { get; set; }
    }

    public class EmailInfoModel
    {
        private string m_FilePaht = string.Empty;
        /// <summary>
        /// 附件路径
        /// </summary>
        public string FilePaht
        {
            get { return m_FilePaht; }
            set { m_FilePaht = value; }
        }
        private string m_SmtpServer = "";
        /// <summary>
        /// SMTP服务器名
        /// </summary>
        public string SmtpServer
        {
            get { return m_SmtpServer; }
            set { m_SmtpServer = value; }
        }
        private int m_Port = 25;
        /// <summary>
        /// 端口
        /// </summary>
        public int Port
        {
            get { return m_Port; }
            set { m_Port = value; }
        }
        private string m_SendEmail = "";
        /// <summary>
        /// 发件人邮箱
        /// </summary>
        public string SendEmail
        {
            get { return m_SendEmail; }
            set { m_SendEmail = value; }
        }
        private string m_SendEailPass = "";
        /// <summary>
        /// 发件人邮箱密码
        /// </summary>
        public string SendEailPass
        {
            get { return m_SendEailPass; }
            set { m_SendEailPass = value; }
        }
        private string m_ReceiveEmail = "";
        /// <summary>
        /// 收件人邮箱
        /// </summary>
        public string ReceiveEmail
        {
            get { return m_ReceiveEmail; }
            set { m_ReceiveEmail = value; }
        }
        private string m_Title = "Test";
        /// <summary>
        /// 邮件主题
        /// </summary>
        public string Title
        {
            get { return m_Title; }
            set { m_Title = value; }
        }
        private string m_Message = "您的密码是111111";
        /// <summary>
        /// 邮件内容
        /// </summary>
        public string Message
        {
            get { return m_Message; }
            set { m_Message = value; }
        }
        private int m_Timeout;
        /// <summary>
        /// 超时
        /// </summary>
        public int Timeout
        {
            get { return m_Timeout; }
            set { m_Timeout = value; }
        } }

Answer 2

调用：            string msg = "";
            EmailInfoModel email = new EmailInfoModel();
            email.SmtpServer = "smtp.qq.com";
            email.Port = "25";
            email.SendEmail = "";
            email.SendEmailPass = "";
            email.ReceiveEmail = "";
            email.Title = "";
            email.Message = ""
            GlbMail emailSevice = new GlbMail();
            emailSevice.Send(email, out msg);