ASP.NET中常用功能代码总结（1）——发送邮件篇
整理：Terrylee
一． 用Asp.net实现邮件系统
1
/**//// <summary>
2
/// 功能：实现在Web页面中发送Email
3
/// </summary> 4
private void SendMail()
5 
{
6 MailMessage m = new MailMessage();
7
8
/**////发件人地址
9 m.From = tbFrom.Text;
10
11 /**////收件人地址
12 m.To = tbTo.Text;
13
14 /**////邮件主题
15 m.Subject = tbSubject.Text;
16
17 /**////邮件内容
18 m.Body = tbBody.Text;
19
20 /**////优先级
21 switch(ddlp.SelectedIndex)
22 {
23 case 0:
24 m.Priority = MailPriority.High;
25 break;
26 case 1:
27 m.Priority = MailPriority.Low;
28 break;
29 default:
30 m.Priority = MailPriority.Normal;
31 break;
32
}
33
34 /**////设置邮件格式
35 if(ddlp.SelectedIndex==0)
36 m.BodyFormat = MailFormat.Text;
37 else
38 m.BodyFormat = MailFormat.Html;
39
40 /**////设置服务器
41 if(tbServer.Text!="")
42 {
43 SmtpMail.SmtpServer = tbServer.Text;
44 }
45
46 /**////以下处理附件
47 string strFileName = FileSelect.PostedFile.FileName;
48 if(strFileName!="")
49 m.Attachments.Add(new MailAttachment(strFileName));
50
51 /**////发送邮件
52 SmtpMail.Send(m);
53 }
二． 利用Socket来接收邮件
1/**//// <summary>
2 /// 接收邮件
3 /// </summary> 4 private void SocketPopMail()
5 {
6 POP3 pop = new POP3(tbServer.Text,tbUser.Text,tbPass.Text);
7 int n = pop.GetNumberOfNewMessages();
8 if(n==-1)
9 {
10 Response.Write("<script language='javascript'>alert('服务器连接错误！')</script>");
11 return;
12 }
13 ddlNew.Items.Clear();
14 for(int i=1;i<=n;i++)
15 ddlNew.Items.Add("第"+i.ToString()+"封邮件");
16 if(n>0)
17 {
18 MailMessage msg = pop.GetNewMessages(0);
19 if(msg!=null)
20 tbBody.Text = msg.Body;
21 }
22 } POP3类的实现如下：
1/**//// <summary>
2 /// 接收邮件类
3 /// </summary> 4 public class POP3
5 {
6 string POPServer;
7 string user;
8 string pwd;
9 NetworkStream ns;
10 StreamReader sr;
11
12 public POP3(){}
13
14 public POP3(string server, string _user, string _pwd)
15 {
16 POPServer = server;
17 user = _user;
18 pwd = _pwd;
19 }
20
21 /**//// <summary>
22 /// 连接服务器
23 /// </summary>
24 /// <returns></returns>
25 private bool Connect()
26 {
27 TcpClient sender = new TcpClient(POPServer,110);
28 byte[] outbytes;
29 string input;
30
31 try
32 {
33 ns = sender.GetStream();
34 sr = new StreamReader(ns);
35
36 sr.ReadLine();
37 input = "user " + user + "\r\n";
38 outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
39 ns.Write(outbytes,0,outbytes.Length) ;
40 sr.ReadLine();
41
42 input = "pass " + pwd + "\r\n";
43 outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
44 ns.Write(outbytes,0,outbytes.Length) ;
45 sr.ReadLine();
46 return true;
47
48 }
49 catch
50 {
51 return false;
52 }
53 }
54
55 /**//// <summary>
56 /// 断开与服务器的连接
57 /// </summary>
58 private void Disconnect()
59 {
60 string input = "quit" + "\r\n";
61 Byte[] outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
62 ns.Write(outbytes,0,outbytes.Length);
63 ns.Close();
64 }
65
66 public int GetNumberOfNewMessages()
67 {
68 byte[] outbytes;
69 string input;
70
71 try
72 {
73 Connect();
74
75 input = "stat" + "\r\n";
76 outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
77 ns.Write(outbytes,0,outbytes.Length);
78 string resp = sr.ReadLine();
79 string[] tokens = resp.Split(new Char[] {' '});
80
81 Disconnect();
82
83 return Convert.ToInt32(tokens[1]);
84 }
85 catch
86 {
87 return -1;
88 }
89 }
90 public ArrayList GetNewMessages(string subj)
91 {
92
93 int newcount;
94 ArrayList newmsgs = new ArrayList();
95
96 try
97 {
98 newcount = GetNumberOfNewMessages();
99 Connect();
100
101 for(int n=1; n<newcount+1; n++)
102 {
103 ArrayList msglines = GetRawMessage(n);
104 string msgsubj = GetMessageSubject(msglines);
105 if(msgsubj.CompareTo(subj) == 0)
106 {
107 System.Web.Mail.MailMessage msg = new MailMessage();
108 msg.Subject = msgsubj;
109 msg.From = GetMessageFrom(msglines);
110 msg.Body = GetMessageBody(msglines);
111 newmsgs.Add(msg);
112 DeleteMessage(n);
113 }
114 }
115
116 Disconnect();
117 return newmsgs;
118 }
119 catch(Exception e)
120 {
121 return newmsgs;
122 }
123 }
124
125 /**//// <summary>
126 /// 获取新邮件
127 /// </summary>
128 /// <param name="nIndex"></param>
129 /// <returns></returns>
130 public MailMessage GetNewMessages(int nIndex)
131 {
132 int newcount;
133 System.Web.Mail.MailMessage msg = new MailMessage();
134
135 try
136 {
137 newcount = GetNumberOfNewMessages();
138 Connect();
139 int n = nIndex+1;
140
141 if(n<newcount+1)
142 {
143 ArrayList msglines = GetRawMessage(n);
144 string msgsubj = GetMessageSubject(msglines);
145
146
147 msg.Subject = msgsubj;
148 msg.From = GetMessageFrom(msglines);
149 msg.Body = GetMessageBody(msglines);
150 }
151
152 Disconnect();
153 return msg;
154 }
155 catch
156 {
157 return null;
158 }
159 }
160 private ArrayList GetRawMessage (int messagenumber)
161 {
162 Byte[] outbytes;
163 string input;
164 string line = "";
165
166 input = "retr " + messagenumber.ToString() + "\r\n";
167 outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
168 ns.Write(outbytes,0,outbytes.Length);
169
170 ArrayList msglines = new ArrayList();
171 do
172 {
173 line = sr.ReadLine();
174 msglines.Add(line);
175 } while (line != ".");
176 msglines.RemoveAt(msglines.Count-1);
177
178 return msglines;
179 }
180
181