一、介绍+ v' G6 v& w) ?" s0 r9 i
System.Net.Mail命名空间是在.NET Framework中新增的,该命名空间提供了发送电子邮件的功能。通过对本章的学习,读者可以轻松地使用.NET Framework提供的类库来发送电子邮件。System.Net.Mail 命名空间包含用于将电子邮件发送到SMTP服务器的类,这些类需要结合Microsoft SMTP Server一起使用。
: F/ n1 M" Z, p7 Q/ F: J6 S' p System.Net.Mail 命名空间下有SmtpClient类用于发送邮件,可以完全代替SmtpMail类。利用SmtpClient类的Send方法可以完成发送电子邮件的传 输,也可以用SendAsync方法进行异步发送,后者发送完成后会产生一个SendCompleted 事件来通知发送结果。Send方法可以接受MailMessage类的对象作为参数。通过MailMessage类可以设置邮件更多的内容和格式,例如,为 Attachment类设置添加附件的参数。
7 j2 [; k( X3 N, p SmtpClient 类与SMTP结合在一起,通过MailMessage类、MailAddress类、Attachment类来丰富电子邮件的内容和设置。图18-2展示 了用户通过System.Net.Mail命名空间下的类结合SMTP发送电子邮件的过程。0 i! h. P+ V+ n. R
二、SmtpClient类的语法定义如下:( m' o" l" b$ m/ \
public class SmtpClient. t/ W4 T/ q* q! I6 K( I+ u- ?9 S
下面的代码演示如何创 建一个SmtpClient的实例。
$ g( p9 U. q9 @9 K+ KSmtpClient client = new SmtpClient (“smtp.Sina.com”); //直接通过构造函数设置SMTP 主机服务器0 o* ]5 u$ a6 _9 Z0 a& T
或:5 P1 H$ T+ W S) e! Z
SmtpClient client = new SmtpClient ();* e5 I# ^% G% j) F* i$ b7 K8 ~, i
Client. Host =” smtp.Sina.com”; //通过Host属性来设置SMTP 主机服务器+ \+ K* q, f+ O4 e
三、完整代码
- {) g( E; Y+ i- Y* E1 X0 P# G* P
- /// <summary>
- /// 邮件处理器
- /// </summary>
- public class MailHandler
- {
- private MailMessage _mailMessage;
- private string _host;
- private string _userName;
- private string _password;
-
- public MailHandler()
- {
- }
-
- /// <summary>
- /// 设置邮件信息
- /// </summary>
- /// <param name="subject">主体</param>
- /// <param name="body">内容</param>
- /// <param name="from">发件人</param>
- /// <param name="to">收件人</param>
- /// <param name="cc">抄送人</param>
- /// <param name="bcc">密件抄送人</param>
- /// <param name="isBodyHtml">内容是否为Html</param>
- public void SetMailMessage(string subject, string body, string from, string[] to, string[] cc, string[] bcc, bool isBodyHtml = true)
- {
- _mailMessage = new MailMessage();
- _mailMessage.Subject = subject;
- _mailMessage.Body = body;
- _mailMessage.IsBodyHtml = isBodyHtml;
-
- _mailMessage.From = new MailAddress(from);
- if (to != null)
- {
- foreach (var item in to)
- {
- _mailMessage.To.Add(item);
- }
- }
- if (cc != null)
- {
- foreach (var item in cc)
- {
- _mailMessage.CC.Add(item);
- }
- }
- if (bcc != null)
- {
- foreach (var item in bcc)
- {
- _mailMessage.Bcc.Add(item);
- }
- }
-
- _mailMessage.BodyEncoding = System.Text.Encoding.UTF8;
- }
-
- /// <summary>
- /// 配置Smtp服务主机及身份验证
- /// </summary>
- /// <param name="host">Smtp主机名或Ip</param>
- /// <param name="userName">用户名</param>
- /// <param name="password">密码</param>
- public void SetSmtp(string host, string userName, string password)
- {
- this._host = host;
- this._userName = userName;
- this._password = password;
- }
-
- /// <summary>
- /// 发送邮件
- /// </summary>
- public void Send()
- {
- using (var sc = new SmtpClient())
- {
- sc.Host = _host;
- sc.Port = 25;
- sc.DeliveryMethod = SmtpDeliveryMethod.Network;
- sc.Credentials = new System.Net.NetworkCredential(_userName, _password);
- sc.Send(_mailMessage);
- }
- }
-
- public string SendMail(string title, string content)
- {
- var smptHost = ConfigHelper.GetAppSetting("SmtpHost");
- var userName = ConfigHelper.GetAppSetting("MailUserName");
- var password = ConfigHelper.GetAppSetting("MailPassword");
- var mailToAddress = ConfigHelper.GetAppSetting("MailAddress").Split(',');
-
- if (string.IsNullOrWhiteSpace(smptHost))
- {
- return "SmtpHost为空";
- }
- if (string.IsNullOrWhiteSpace(userName))
- {
- return "发件人为空";
- }
- if (string.IsNullOrWhiteSpace(password))
- {
- return "发件人密码为空";
- }
- if (mailToAddress.Length == 0)
- {
- return "收件人列表为空";
- }
-
- var mailContent = @"<html><head><title>邮件内容</title></head>
- <body>" + content + "</body></html>";
-
- SetSmtp(smptHost, userName, password);
- SetMailMessage(title, mailContent, userName, mailToAddress, null, null);
-
- try
- {
- Send();
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