Question

c#网络应用编程 发送邮件中怎么发送给多人

Answer 1

用To.Add()方法就可以添加多个收件人了，具体代码：
MailMessage mailObj = new MailMessage();
mailObj.From = new MailAddress("admin" + "@lisco.com.cn");//发信人地址
mailObj.To.Add("LZ" + "6e804" + "@lisco.com.cn");//收信地址
mailObj.To.Add("LZ" + "6e769" + "@lisco.com.cn");//收信地址
mailObj.Subject = mail_text;//邮件标题
//html格式的邮件
mailObj.IsBodyHtml = true;
////设置为高级优先权(可设可不设)
//mailObj.Priority = MailPriority.High;
//使用SmtpMail对象发送邮件
SmtpClient smtp = new SmtpClient("10.128.8.11");
smtp.Send(mailObj);

Answer 2

  private void SendEMail() 
  { string mailFrom = System.Configuration.ConfigurationManager.AppSettings["MailFrom"].ToString();
           string mailUser = System.Configuration.ConfigurationManager.AppSettings["MailUser"].ToString();
                    string mailPassword = System.Configuration.ConfigurationManager.AppSettings["MailPassword"].ToString();
                           string hostIP = System.Configuration.ConfigurationManager.AppSettings["MailHost"].ToString();
                                    List<string> mailAddress = new List<string>();
                                           string mailSubjct = "邮件主题";    
           string mailBody = "邮件内容:"；
           mailAddress.Add("邮件地址");string strReturn = sendMail(mailSubjct, mailBody, mailFrom, mailAddress, hostIP, mailUser, mailPassword, false);
  }

public static string sendMail(string mailSubjct, string mailBody, string mailFrom, List<string> mailAddress, string hostIP, string username, string password, bool ssl)
 2         {
 3             string str = "";
 4             try
 5             {
 6                 MailMessage message = new MailMessage
 7                 {
 8                     IsBodyHtml = true,
 9                     Subject = mailSubjct,
10                     Body = mailBody,
11 
12                     From = new MailAddress(mailFrom)
13                 };
14                 for (int i = 0; i < mailAddress.Count; i++)
15                 {
16                     message.To.Add(mailAddress[i]);
17                 }
18                 SmtpClient client = new SmtpClient
19                 {
20                     EnableSsl = ssl,
21                     UseDefaultCredentials = false
22                 };
23                 NetworkCredential credential = new NetworkCredential(username, password);
24                 client.Credentials = credential;
25                 client.DeliveryMethod = SmtpDeliveryMethod.Network;
26                 client.Host = hostIP;
27                 client.Port = 0x19;
28                 client.Send(message);
29             }
30             catch (Exception exception)
31             {
32                 str = exception.Message;
33             }
34             return str;
35         }

mailAddress
邮件地址添加多个就可以了

Answer 3

System.Web.Helpers下有
WebMail 静态类
System.Net.Mail下有
MailMessage 实例类

Answer 4

用的是using System.Net;吗？直接加收件人就可以，用;分开。