C#中发送邮件时模板处理

在c#的项目中，常常需要添加邮件发送的功能，邮件发送时的模板往往不是一成不变的，是需要根据case的不同来确定不同内容的邮件，发送给不同的对象，这里分享一种邮件模板处理的方式，仅供参考（邮件发送的函数参考https://blog.csdn.net/lixiaoer757/article/details/80696370）

1.邮件模板（红色部分是需要根据case来确定的）

2.模板处理类

/*=============================================================
 * Template 处理
 * Author ： Danny,Li
 * E-mail ： [email protected]
 * Edition： V-101014
 *=============================================================*/
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections.Specialized;
using System.Collections;
using System.IO;

namespace IRCommon
{
    public class TemplateHelper
    {
        /// <summary>
        /// 私有构造方法，不允许创建实例
        /// </summary>
        private TemplateHelper()
        {
            // TODO: Add constructor logic here
        }

        /// <summary>
        /// Template File Helper 
        /// </summary>
        /// <param name="templatePath">Templet Path</param>
        /// <param name="values">NameValueCollection</param>
        /// <returns>string</returns>
        public static string BulidByFile(string templatePath, NameValueCollection values)
        {
            return BulidByFile(templatePath, values, "[$", "]");
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="template"></param>
        /// <param name="values">NameValueCollection obj</param>
        /// <param name="prefix"></param>
        /// <param name="postfix"></param>
        /// <returns></returns>
        public static string Build(string template, NameValueCollection values, string prefix, string postfix)
        {
            if (values != null)
            {
                foreach (DictionaryEntry entry in values)
                {
                    template = template.Replace(string.Format("{0}{1}{2}", prefix, entry.Key, postfix), entry.Value.ToString());
                }
            }
            return template;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="templatePath"></param>
        /// <param name="values"></param>
        /// <param name="prefix"></param>
        /// <param name="postfix"></param>
        /// <returns></returns>
        public static string BulidByFile(string templatePath, NameValueCollection values, string prefix, string postfix)
        {
            StreamReader reader = null;
            string template = string.Empty;
            try
            {
                reader = new StreamReader(templatePath);
                template = reader.ReadToEnd();
                reader.Close();
                if (values != null)
                {
                    foreach (string key in values.AllKeys)
                    {
                        template = template.Replace(string.Format("{0}{1}{2}", prefix, key, postfix), values[key]);
                    }
                }
            }
            catch
            {

            }
            finally
            {
                if (reader != null)
                    reader.Close();
            }
            return template;
        }
    }
}

3.c#的邮件发送函数

//发送邮件通知
    private void SendMail(string email, string name, string sdate, string edate, string course, string point)
    {
        string mailFrom = MailHelper.MailServerFrom;
        string mailTo = string.Empty;
        string mailSubject = string.Empty;
        string mailBody = string.Empty;
        string mailAttch = string.Empty;
        string mailCode = string.Empty;
        string mailPriority = string.Empty;
        string mailCC = string.Empty;
        string resultMessage = "";
        if (!string.IsNullOrEmpty(email))
        {
            mailTo = email;
            mailSubject = "Change By Innovation 加分通知";
            try 
            {            
                string templetpath = Server.MapPath("../mailtemplate/irupoint.txt");
                NameValueCollection myCol = new NameValueCollection();
                myCol.Add("ename", name);
                myCol.Add("sdate", sdate);
                myCol.Add("edate", edate);
                myCol.Add("course", course);
                myCol.Add("point", point);
                myCol.Add("link", System.Configuration.ConfigurationManager.AppSettings["rootUrl"]);
                mailBody = TemplateHelper.BulidByFile(templetpath, myCol);
                MailHelper.SendNetMail(mailFrom, mailTo, mailSubject, mailBody, mailAttch, mailCode, mailPriority, mailCC, out resultMessage);
            }
            catch (Exception ex)
            {
            }
        }
    }

4.目录中的mailtemplate/irupoint.txt

<html>
<head>
<title>Change By Innovation 加分通知</title>
<style type="text/css">
    body{ font-family:Arial,"宋体"; font-size: 12px; font-weight: normal; color: #666666; }
</style>
</head>
<body bgcolor="#F6FAFB">
    <p>[$ename] 您好，</p>
    <p>
            
        您在 [$sdate] 至 [$edate] 参加IRU培训课程《[$course]》，系统为您添加 [$point] 分。
        <br><br>    
        感谢您对 Change By Innovation 的支持，请<a href='[$link]'>点击此处</a>登陆系统，查看您的总积分及排名信息。
    </p>
    <br><br>
    <p>    系统邮件，请勿回复！</p>
</body>
</html>

5.邮件发送的函数MailHelper.SendNetMail(...)

参考https://blog.csdn.net/lixiaoer757/article/details/80696370

需要在配置文件中配置SMTP服务器等信息