发送邮件使用SMTP服务器，有两种方案，一种是使用IIS的SMTP功能；另一种是直接使用邮件供应商的SMTP，比如Gmail、Sina、QQ等，使用这些SMTP服务器必须得注册帐号，一般可以直接用邮箱及密码，但是有些邮箱必须开启POP3/SMTP服务才可以，比如QQ邮箱默认是关闭的，可以在“设置”->“账户”里面找到。我今天整理的都是用的第二种。
早期的.NET版本用的是 System.Web.Mail 类提供的功能来发邮件；2.0版本推出了 System.Net.Mail 类来代替 System.Web.Mail ，但是我在 WebForm 里面使用的时候用System.Net.Mail 老是触发异常，后来改用 System.Web.Mail 才成功了，可以看下我代码里的区别；ASP.NET MVC 3 提供了 WebMail 类来发送邮件，更加方便。
控制台程序、WPF、WebForm 及 ASP.NET MVC 我都测试了一下，控制台程序和 WPF 都用了 System.Net.Mail ，WebForm 和 ASP.NET MVC 都可以用 System.Web.Mail ，而 ASP.NET MVC 3 直接用 WebMail 更方便。下面我把代码分别贴出来。
控制台程序：
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Net.Mail;//添加引用
6
7 namespace SendEmail
8 {
9 class Program
10 {
11 static void Main(string[] args)
12 {
13 Program p = new Program();
14 bool flag = p.SendEmail();
15 if (flag)
16 {
17 Console.Write("Success !");
18 }
19
20 Console.Read();
21 }
22
23 public bool SendEmail()
24 {
25 MailMessage msg = new MailMessage();
26 msg.To.Add("[email protected]");//邮件接收者的帐号
27 msg.From = new MailAddress("[email protected]", "nickname", System.Text.Encoding.UTF8);//发送邮件的帐号及显示名称和字符编码
28 msg.Subject = "Subject";//邮件标题
29 msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码
30 msg.Body = "Content";//邮件内容
31 msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码
32 msg.IsBodyHtml = false;//是否是HTML邮件
33 msg.Priority = MailPriority.High;//邮件优先级
34
35 SmtpClient client = new SmtpClient();
36 client.Credentials = new System.Net.NetworkCredential("[email protected]", "password");//注册的邮箱和密码，就QQ邮箱而言，如果设置了独立密码，要用独立密码代替密码
37 client.Host = "smtp.qq.com";//QQ邮箱对应的SMTP服务器
38 object userState = msg;
39 try
40 {
41 client.SendAsync(msg, userState);
42 return true;
43 }
44 catch (Exception ex)
45 {
46 Console.WriteLine(ex.Message);
47 return false;
48 }
49 }
50 }
51 }
WPF:
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Net.Mail;//添加引用
5 using System.Text;
6 using System.Windows;
7 using System.Windows.Controls;
8 using System.Windows.Data;
9 using System.Windows.Documents;
10 using System.Windows.Input;
11 using System.Windows.Media;
12 using System.Windows.Media.Imaging;
13 using System.Windows.Navigation;
14 using System.Windows.Shapes;
15
16 namespace WPFSendMail
17 {
18 /// <summary>
19 /// MainWindow.xaml 的交互逻辑
20 /// </summary>
21 public partial class MainWindow : Window
22 {
23 public MainWindow()
24 {
25 InitializeComponent();
26 }
27
28 private void Button_Click(object sender, RoutedEventArgs e)
29 {
30 bool flag = SendMail();
31 if (flag)
32 {
33 MessageBox.Show("Success !","Tips");
34 }
35 }
36
37 public bool SendMail()
38 {
39 MailMessage message = new MailMessage();
40 message.To.Add(" @qq.com");
41 message.From = new MailAddress(" @qq.com","nickname",Encoding.UTF );
42 message.Subject = "Sending e-mail in WPF !";
43 message.SubjectEncoding = Encoding.UTF ;
44 message.Body = "Awesome";
45 message.BodyEncoding = Encoding.UTF ;
46 message.IsBodyHtml = false;
47 message.Priority = MailPriority.Normal;
48 Attachment att = new Attachment("text.txt");//添加附件，确保路径正确
49 message.Attachments.Add(att);
50
51 SmtpClient smtp = new SmtpClient();
52 smtp.Credentials = new System.Net.NetworkCredential(" @qq.com","password");
53 smtp.Host = "smtp.qq.com";
54 object userState = message;
55
56 try
57 {
58 smtp.SendAsync(message,userState);
59 return true;
60 }
61 catch (Exception ex)
62 {
63 MessageBox.Show(ex.Message,"Tips");
64 return false;
65 }
66 }
67 }
68 }
Winform:
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Web;
6 using System.Web.UI;
7 using System.Web.UI.WebControls;
8 using System.Web.Mail;//添加引用
9
10 namespace WebFormSendEmail
11 {
12 public partial class WebForm : System.Web.UI.Page
13 {
14 protected void Page_Load(object sender, EventArgs e)
15 {
16
17 }
18
19 protected void Button _Click(object sender, EventArgs e)
20 {
21 bool flag = SendMail();
22 if (flag)
23 {
24 Response.Write("<script>alert(‘Success !‘);</script>");
25 }
26 }
27
28 public bool SendMail()
29 {
30 MailMessage message = new MailMessage();
31 message.To = " @qq.com";
32 message.From = " @qq.com";
33 message.Subject = "Sending e-mail in Web !";
34 message.Body = "Awesome";
35 //基本权限
36 message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", " ");
37 //用户名
38 message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", " @qq.com");
39 //密码
40 message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "password");
41
42 SmtpMail.SmtpServer = "smtp.qq.com";
43 try
44 {
45 SmtpMail.Send(message);
46 return true;
47 }
48 catch (Exception ex)
49 {
50 Response.Write(ex.Message);
51 return false;
52 }
53 }
54 }
55 }
MVC:
1 try
2 {
3 WebMail.SmtpServer = "smtp.qq.com";
4 WebMail.SmtpPort = 25;//端口号，不同SMTP服务器可能不同，可以查一下
5 WebMail.EnableSsl = false;//禁用SSL
6 WebMail.UserName = "[email protected]";
7 WebMail.Password = "password";
8 WebMail.From = "[email protected]";
9 WebMail.Send("[email protected]","Subject",“Content");
10 }
11 catch (Exception)
12 {
13
14 }
时间： 2024-10-14 01:28:25