asp.net 客户邮件群发功能 SendMail 发送静态化html

背景：现在几乎每个企业都要用到邮箱，而在大客户量情况下，为我们的不同等级的客户送上节日关怀，以及把我们的喜讯、新品通知到他们是我们急需解决的问题。效果如图

思路：

1、静态化网页模版，首先考虑需要发送什么，把需要的东西做成小而精美的html静态化页面以待发送时候用到；

2、关于发送问题，点击“发送邮件”弹出群发邮件的框，填写主题、html的服务器所在地址、收件人（多个）；

3、群发的实现。

代码C#：

/// <summary>
/// 发送失败的邮箱地址搜集参数
/// </summary>
private string errorMail;

群发邮件点击事件

protected void BtnSendMail_Click(object sender, EventArgs e)
    {
        if (string.IsNullOrEmpty(txTopic.Value))
        {
            MessageShow("邮件主题必填");
            return;
        }
        if (string.IsNullOrEmpty(txUrl.Value))
        {
            MessageShow("URL内容必填");
            return;
        }
        if (string.IsNullOrEmpty(txTo.Value))
        {
            MessageShow("收件人必填");
            return;
        }

string email = ConfigurationManager.AppSettings["ManagerSendMailUserName"].ToString();  //登录用户邮箱
        string emailpwd = ConfigurationManager.AppSettings["ManagerSendMailUserPwd"].ToString(); //登录用户邮箱密码

string s = GetHtmlCode(txUrl.Value, "gb2312");
        bool restr = Sendmail(email, txTo.Value, txTopic.Value, true, s, "smtp.exmail.qq.com", email, emailpwd);
        if (restr)
        {
            ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('全部发送成功！');</script>");
        }
        else
        {
            ClientScript.RegisterStartupScript(this.GetType(), "",
            "<script>alert('已发送，但以下地址发送失败：" + errorMail + "可能是地址不存在！');</script>");
        }
    }

/// <summary>
    /// 发送邮件
    /// </summary>
    /// <param name="from">发送人邮件地址</param>
    /// <param name="to">接收人邮件地址</param>
    /// <param name="subject">邮件主题</param>
    /// <param name="isBodyHtml">是否是Html</param>
    /// <param name="body">邮件体</param>
    /// <param name="smtpHost">SMTP服务器地址,例如:smtp.163.com</param>
    /// <param name="userName">用户名</param>
    /// <param name="password">密码</param>
    /// <returns>是否成功</returns>
    public bool Sendmail(string from, string to, string subject, bool isBodyHtml, string body, string smtpHost, string userName, string password)
    {
        bool isSuccess = true;
        string[] ts = null;
        if (!string.IsNullOrEmpty(to))
        {
            if (to.Contains(";"))
                ts = to.Split(';');
            else
                ts = new string[] { to };
            foreach (string t in ts)
            {
                if (!string.IsNullOrEmpty(t))
                {
                    MailMessage mm = new MailMessage();
                    mm.From = new MailAddress(from);
                    mm.To.Add(new MailAddress(t));
                    mm.Subject = subject;
                    mm.IsBodyHtml = isBodyHtml;
                    mm.Body = body;
                    SmtpClient sc = new SmtpClient();
                    sc.Host = smtpHost;
                    sc.Port = 25;
                    sc.EnableSsl = false;
                    sc.Credentials = new NetworkCredential(userName, password);
                    sc.UseDefaultCredentials = true;
                    sc.Credentials = new System.Net.NetworkCredential(userName, password);
                    sc.DeliveryMethod = SmtpDeliveryMethod.Network;
                    try
                    {
                        sc.Send(mm);
                    }
                    catch (Exception x)
                    {
                        errorMail += t + ";";
                        isSuccess = false;
                        continue;
                    }
                }
            }
        }
        return isSuccess;
    }

/// <summary>
    /// 获取指定路径下的模板的HTML源代码
    /// </summary>
    /// <param name="TemplatePath">模板的路径</param>
    /// <param name="EncodingType">网页类型（有些是UTF8，有些是GB2312）</param>
    /// <returns>源代码</returns>
    private string GetHtmlCode(string TemplatePath, string EncodingType)
    {
        try
        {
            if (TemplatePath != string.Empty)
            {
                string ForesideUriPath = string.Empty;

if (!TemplatePath.ToLower().StartsWith("http://"))
                    ForesideUriPath = HttpContext.Current.Server.MapPath("~/") + TemplatePath;
                else
                    ForesideUriPath = TemplatePath;

WebClient webClient = new WebClient();

//设置网络凭证为系统凭证
                webClient.Credentials = CredentialCache.DefaultCredentials;

//获取指定URI的网页的源代码
                byte[] byteDataBuffer = webClient.DownloadData(ForesideUriPath);

string htmlCode = "";
                if (EncodingType == "UTF8")
                {
                    htmlCode = Encoding.UTF8.GetString(byteDataBuffer);
                }
                else
                {
                    htmlCode = Encoding.GetEncoding(EncodingType).GetString(byteDataBuffer);
                }

htmlCode = Regex.Replace(htmlCode, @"<!DOCTYPE\s*HTML\s*PUBLIC[^>]+>", "", RegexOptions.Singleline);
                htmlCode = Regex.Replace(htmlCode, @"\s+", " ", RegexOptions.Singleline);

return htmlCode;
            }
            else
            {
                return "";
            }
        }
        catch (Exception ee)
        {
            throw (ee);
        }
    }

总结：这个功能还是非常有用的，大家可以扩展，定时发送什么，实现各种烂漫的功能。最后说一声，祝大家羊年大吉，心想事成！