C#.NET使用HTML模板发送电子邮件

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要使用html模板进行发送邮件，需要准备以下几项工作：

1）HTML模板

2）替换函数（替换模板中绑定的变量）

3）邮件函数（发送邮件）

一、HTML模板

01.<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  02.<html xmlns="http://www.w3.org/1999/xhtml" >  03.<head>  04.    <title>HTML Report</title>  05.</head>  06.<body>  07.<p >$USER_NAME$:</p>  08.  09.  10.<p>My name is $NAME$</p>  11.<p >This is a Test Email,<br />  12.  $MY_NAME$</p>  13.</body>  14.</html>

其中USER_NAME、NAME、MY_NAME这三个变量用$符号包裹进行标识，是需要被替换的字符串，它会在下面的替换函数中被动态替换。

二、替换函数

01./// <summary>   02.///替换模板中的字段值   03./// </summary>   04.public string ReplaceText(String userName,string name,string myName)  05.{  06.  07.    string path = string.Empty;  08.   09.    path = HttpContext.Current.Server.MapPath("EmailTemplate\\emailTemplate.html");  10.             11.    if (path == string.Empty)  12.    {  13.        return string.Empty;  14.    }  15.    System.IO.StreamReader sr = new System.IO.StreamReader(path);  16.    string str = string.Empty;  17.    str = sr.ReadToEnd();  18.    str = str.Replace("$USER_NAME$", userName);  19.    str = str.Replace("$NAME$", name);  20.    str = str.Replace("$MY_NAME$",myName);  21.  22.    return str;  23.}

三、邮件发送

01.        /// <summary>   02.        /// 发送邮件   03.        /// </summary>   04. public void SendEmail(string email_from,string email_to, string email_cc, string userName, string name, string myName)  05.        {  06.  07.            try  08.            {  09.                // 建立一个邮件实体   10.                MailAddress from = new MailAddress(email_from);  11.  12.  13.                MailAddress to = new MailAddress(email_to);  14.                MailMessage message = new MailMessage(from, to);  15.  16.                string strbody = ReplaceText(userName, name, myName);  17.  18.                if (email_cc.ToString() != string.Empty)  19.                {  20.                    foreach (string ccs in email_cc.Split(';'))  21.                    {  22.                        MailAddress cc = new MailAddress(ccs);  23.                        message.CC.Add(cc);  24.                    }  25.                }  26.  27.                message.IsBodyHtml = true;  28.                message.BodyEncoding = System.Text.Encoding.UTF8;  29.                message.Priority = MailPriority.High;  30.                message.Body = strbody;  //邮件BODY内容  31.                message.Subject = "Subject";  32.  33.                SmtpClient smtp = new SmtpClient();  34.                smtp.Host = Configuration.MailHost;  35.                smtp.Port = Configuration.MailHostPort;  36.                smtp.Credentials = new System.Net.NetworkCredential(email_from, "emailpassword");  37.               38.                smtp.Send(message); //发送邮件  39.  40.            } catch (Exception ex)  41.            {  42.                throw ex;  43.            }  44.  45.        }

其实无论采取什么方式或组件进行邮件发送，要替换HTML模板中的内容，只需一个Replace函数即可。