自制邮箱激活功能全套

public static bool sendmail(string to, string title, string content, string Host, string Account, string Pwd,string From)
        {
            SmtpClient _smtpClient = new SmtpClient();
            _smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式
            _smtpClient.Host = Host;//指定SMTP服务器
            _smtpClient.Credentials = new System.Net.NetworkCredential(Account, Pwd);//用户名和密码
            _smtpClient.EnableSsl = true;
            MailMessage _mailMessage = new MailMessage(From, to);
            _mailMessage.Subject = title;//主题
            _mailMessage.Body = content;//内容
            _mailMessage.BodyEncoding = System.Text.Encoding.UTF8;//正文编码
            _mailMessage.IsBodyHtml = true;//设置为HTML格式
            _mailMessage.Priority = MailPriority.High;//优先级

            try
            {
                _smtpClient.Send(_mailMessage);
                return true;
            }
            catch
            {
                return false;
            }
        }

 string ConSql = ConfigurationManager.ConnectionStrings["ConStr"].ToString();
            string Url = Request.Url.AbsoluteUri.Replace(Request.Url.PathAndQuery, "") + Request.ApplicationPath;
            using(SqlConnection conn=new SqlConnection(ConSql))
            {
                conn.Open();
                string sql = "INSERT INTO [Info] ([Title],[Details],[Email]) VALUES(@titles,@details,@email) SELECT @@IDENTITY";
                SqlParameter[] para ={
                                         new SqlParameter("@titles",this.TxtName.Text),
                                         new SqlParameter("@details",this.TxtDetails.Text),
                                         new SqlParameter("@email",this.TxtEmail.Text)
                                    };
                SqlCommand comm = new SqlCommand(sql,conn);


                string sql2 = "SELECT ID FROM [Info] WHERE ID=@@IDENTITY";
                SqlCommand comm1 = new SqlCommand(sql2,conn);
                comm.Parameters.AddRange(para);
                if(comm.ExecuteNonQuery()>0)
                {
                    string email = this.TxtEmail.Text.Trim();
                    string afterSubEmail=email.Substring(email.IndexOf("@")+1).Trim();
                    if(afterSubEmail.Equals("163.com"))
                    {
                        string to = this.TxtEmail.Text.Trim();
                        string title = "来自星星的你发来的邮件";
                        string content = "恭喜你完成了注册，<a href=" + Url + "CheckInfo.aspx?id=" + comm1.ExecuteScalar().ToString() + ">点击链接激活帐号</a>";

                        string Host = "smtp.qq.com";  //STMP服务器地址
                        string Account = "864684766@qq.com";  //SMTP服务帐号
                        string Pwd = "******";   //SMTP服务密码
                        string From = "864684766@qq.com";  //发送方邮件地址

                        bool s = sendmail(to, title, content, Host, Account, Pwd, From);
                        Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert(‘注册成功，我们已经在您的邮箱中发了邮件，请激活账号后登陆‘);</script>");
                    }
                    else if (afterSubEmail.Equals("126.com"))
                    {
                        string to = this.TxtEmail.Text.Trim();
                        string title = "来自星星的你发来的邮件";
                        string content = "恭喜你完成了注册，<a href=" + Url + "CheckInfo.aspx?id=" + comm1.ExecuteScalar().ToString() + ">点击链接激活帐号</a>";

                        string Host = "smtp.qq.com";  //STMP服务器地址
                        string Account = "864684766@qq.com";  //SMTP服务帐号
                        string Pwd = "*****";   //SMTP服务密码
                        string From = "864684766@qq.com";  //发送方邮件地址

                        bool s = sendmail(to, title, content, Host, Account, Pwd, From);
                        Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert(‘注册成功，我们已经在您的邮箱中发了邮件，请激活账号后登陆‘);</script>");
                    }
                    else if (afterSubEmail.Equals("sina.com"))
                    {
                        string to = this.TxtEmail.Text.Trim();
                        string title = "来自星星的你发来的邮件";
                        string content = "恭喜你完成了注册，<a href=" + Url + "CheckInfo.aspx?id=" + comm1.ExecuteScalar().ToString() + ">点击链接激活帐号</a>";

                        string Host = "smtp.qq.com";  //STMP服务器地址
                        string Account = "864684766@qq.com";  //SMTP服务帐号
                        string Pwd = "*****";   //SMTP服务密码
                        string From = "864684766@qq.com";  //发送方邮件地址

                        bool s = sendmail(to, title, content, Host, Account, Pwd, From);
                        Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert(‘注册成功，我们已经在您的邮箱中发了邮件，请激活账号后登陆‘);</script>");
                    }
                    else if (afterSubEmail.Equals("qq.com"))
                    {
                        string to = this.TxtEmail.Text.Trim();
                        string title = "来自星星的你发来的邮件";
                        string content = "恭喜你完成了注册，<a href=" + Url + "CheckInfo.aspx?id=" + comm1.ExecuteScalar().ToString() + ">点击链接激活帐号</a>";

                        string Host = "smtp.qq.com";  //STMP服务器地址
                        string Account = "864684766@qq.com";  //SMTP服务帐号
                        string Pwd = "*****";   //SMTP服务密码
                        string From = "864684766@qq.com";  //发送方邮件地址

                        bool s = sendmail(to,title,content,Host,Account,Pwd,From);
                        Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert(‘注册成功，我们已经在您的邮箱中发了邮件，请激活账号后登陆‘);</script>");
                    }
                }
            }

            string ConStr = ConfigurationManager.ConnectionStrings["ConStr"].ToString();

            //Response.Write(Request.QueryString["id"]);
            using (SqlConnection conn = new SqlConnection(ConStr))
            {
                conn.Open();
                string sql = "UPDATE [Info] SET [Statue]=@statue WHERE [Id]=" + Request.QueryString["id"];
                SqlCommand comm = new SqlCommand(sql, conn);
                SqlParameter para = new SqlParameter("@statue", 1);
                comm.Parameters.Add(para);
                if (comm.ExecuteNonQuery() < 0)
                {
                    Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert(‘激活失败！‘);</script>");
                }
                else
                {
                    Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert(‘激活成功！‘);</script>");
                }
            }