前台代码：html
<%@ Page language="c#" Codebehind="SocketMail.aspx.cs" AutoEventWireup="false" Inherits="UseFramework2.MailSys.Mail" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>Mail</title> <meta content="Microsoft Visual Studio 7.0" name="GENERATOR"> <meta content="C#" name="CODE_LANGUAGE"> <meta content="JavaScript" name="vs_defaultClientScript"> <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Mail" method="post" runat="server"> <FONT face="宋体"> <asp:TextBox id="tbServer" style="Z-INDEX: 101; LEFT: 143px; POSITION: absolute; TOP: 104px" runat="server"></asp:TextBox> <asp:TextBox id="tbSend" style="Z-INDEX: 120; LEFT: 413px; POSITION: absolute; TOP: 223px" runat="server"></asp:TextBox> <asp:Label id="Label10" style="Z-INDEX: 119; LEFT: 334px; POSITION: absolute; TOP: 231px" runat="server">发件人</asp:Label> <asp:Button id="btnSend" style="Z-INDEX: 118; LEFT: 441px; POSITION: absolute; TOP: 325px" runat="server" Width="76" Text="发送" Height="25"></asp:Button> <asp:Label id="Label9" style="Z-INDEX: 117; LEFT: 332px; POSITION: absolute; TOP: 179px" runat="server">收件人</asp:Label> <asp:Label id="Label8" style="Z-INDEX: 116; LEFT: 329px; POSITION: absolute; TOP: 278px" runat="server">邮件主题</asp:Label> <asp:Label id="Label7" style="Z-INDEX: 115; LEFT: 320px; POSITION: absolute; TOP: 102px" runat="server">SMTP服务器</asp:Label> <asp:TextBox id="tbSubject" style="Z-INDEX: 114; LEFT: 415px; POSITION: absolute; TOP: 270px" runat="server"></asp:TextBox> <asp:TextBox id="tbReceive" style="Z-INDEX: 113; LEFT: 416px; POSITION: absolute; TOP: 171px" runat="server"></asp:TextBox> <asp:TextBox id="tbSmtp" style="Z-INDEX: 112; LEFT: 419px; POSITION: absolute; TOP: 100px" runat="server"></asp:TextBox> <asp:Label id="Label5" style="Z-INDEX: 109; LEFT: 54px; POSITION: absolute; TOP: 245px" runat="server">密码</asp:Label> <asp:Label id="Label4" style="Z-INDEX: 108; LEFT: 54px; POSITION: absolute; TOP: 181px" runat="server">用户名称</asp:Label> <asp:label id="Label1" style="Z-INDEX: 106; LEFT: 414px; POSITION: absolute; TOP: 18px" runat="server" Width="175px" Font-Names="隶书" Font-Size="XX-Large">发邮件</asp:label> <asp:label id="Label2" style="Z-INDEX: 105; LEFT: 85px; POSITION: absolute; TOP: 14px" runat="server" Width="175px" Font-Names="隶书" Font-Size="XX-Large">收邮件</asp:label> <asp:TextBox id="tbUser" style="Z-INDEX: 102; LEFT: 143px; POSITION: absolute; TOP: 182px" runat="server"></asp:TextBox> <asp:TextBox id="tbPass" style="Z-INDEX: 103; LEFT: 143px; POSITION: absolute; TOP: 242px" runat="server" TextMode="Password"></asp:TextBox> <asp:TextBox id="tbBody" style="Z-INDEX: 104; LEFT: 141px; POSITION: absolute; TOP: 363px" runat="server" Width="458px" Height="87px"></asp:TextBox> <asp:Label id="Label3" style="Z-INDEX: 107; LEFT: 54px; POSITION: absolute; TOP: 103px" runat="server">POP3服务器</asp:Label> <asp:Button id="btnCheck" style="Z-INDEX: 110; LEFT: 67px; POSITION: absolute; TOP: 315px" runat="server" Width="76" Text="检查" Height="25"></asp:Button> <asp:Label id="Label6" style="Z-INDEX: 111; LEFT: 60px; POSITION: absolute; TOP: 387px" runat="server" Width="71px" Height="27px">邮件正文</asp:Label> <asp:DropDownList id="ddlNew" style="Z-INDEX: 121; LEFT: 200px; POSITION: absolute; TOP: 319px" runat="server" AutoPostBack="True"></asp:DropDownList></FONT></form> </body></HTML>后台代码：cs
using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;using System.Net.Sockets;using System.Net;using System.IO;using System.Web.Mail;using System.Text;namespace UseFramework2.MailSys{
/// <summary>
/// Mail 的摘要说明。
/// </summary> public class Mail : System.Web.UI.Page { protected System.Web.UI.WebControls.TextBox tbServer; protected System.Web.UI.WebControls.TextBox tbUser; protected System.Web.UI.WebControls.TextBox tbPass; protected System.Web.UI.WebControls.Label Label2; protected System.Web.UI.WebControls.Label Label1; protected System.Web.UI.WebControls.Label Label3; protected System.Web.UI.WebControls.Label Label4; protected System.Web.UI.WebControls.Label Label5; protected System.Web.UI.WebControls.Button btnCheck; protected System.Web.UI.WebControls.Label Label6; protected System.Web.UI.WebControls.Label Label7; protected System.Web.UI.WebControls.TextBox tbSmtp; protected System.Web.UI.WebControls.TextBox tbReceive; protected System.Web.UI.WebControls.TextBox tbSubject; protected System.Web.UI.WebControls.Label Label8; protected System.Web.UI.WebControls.Label Label9; protected System.Web.UI.WebControls.Button btnSend; protected System.Web.UI.WebControls.Label Label10; protected System.Web.UI.WebControls.TextBox tbSend; protected System.Web.UI.WebControls.TextBox tbBody; protected System.Web.UI.WebControls.DropDownList ddlNew; private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 }
Web Form Designer generated code private void btnCheck_Click(object sender, System.EventArgs e) { POP3 pop = new POP3(tbServer.Text,tbUser.Text,tbPass.Text); int n = pop.GetNumberOfNewMessages(); if(n==-1) { Response.Write("<script language='javascript'>alert('服务器连接错误！')</script>"); return; } ddlNew.Items.Clear(); for(int i=1;i<=n;i++) ddlNew.Items.Add("第"+i.ToString()+"封邮件"); if(n>0) { MailMessage msg = pop.GetNewMessages(0); if(msg!=null) tbBody.Text = msg.Body; } } private void ddlNew_SelectedIndexChanged(object sender, System.EventArgs e) { POP3 pop = new POP3(tbServer.Text,tbUser.Text,tbPass.Text); int n = ddlNew.SelectedIndex; if(n>=0) { MailMessage msg = pop.GetNewMessages(n); if(msg!=null) tbBody.Text = msg.Body; } } private void btnSend_Click(object sender, System.EventArgs e) { SMTP smtp = new SMTP(); bool bSuccess = smtp.Send(tbSmtp.Text,25,tbSend.Text,tbReceive.Text,tbSubject.Text,tbBody.Text); if(bSuccess) Response.Write("<script language='javascript'>alert('邮件发送成功！')</script>"); else Response.Write("<script language='javascript'>alert('邮件发送失败！')</script>"); } } public class POP3 { string POPServer; string user; string pwd; NetworkStream ns; StreamReader sr; public POP3(){} public POP3(string server, string _user, string _pwd) { POPServer = server; user = _user; pwd = _pwd; } private bool Connect() { TcpClient sender = new TcpClient(POPServer,110); byte[] outbytes; string input; try { ns = sender.GetStream(); sr = new StreamReader(ns); sr.ReadLine(); input = "user " + user + "\r\n"; outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray()); ns.Write(outbytes,0,outbytes.Length) ; sr.ReadLine(); input = "pass " + pwd + "\r\n"; outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray()); ns.Write(outbytes,0,outbytes.Length) ; sr.ReadLine(); return true; } catch { return false; } } private void Disconnect() { string input = "quit" + "\r\n"; Byte[] outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray()); ns.Write(outbytes,0,outbytes.Length); ns.Close(); } public int GetNumberOfNewMessages() { byte[] outbytes; string input; try { Connect(); input = "stat" + "\r\n"; outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray()); ns.Write(outbytes,0,outbytes.Length); string resp = sr.ReadLine(); string[] tokens = resp.Split(new Char[] {' '}); Disconnect(); return Convert.ToInt32(tokens[1]); } catch { return -1; } } public ArrayList GetNewMessages(string subj) { int newcount; ArrayList newmsgs = new ArrayList(); try { newcount = GetNumberOfNewMessages(); Connect(); for(int n=1; n<newcount+1; n++) { ArrayList msglines = GetRawMessage(n); string msgsubj = GetMessageSubject(msglines); if(msgsubj.CompareTo(subj) == 0) { System.Web.Mail.MailMessage msg = new MailMessage(); msg.Subject = msgsubj; msg.From = GetMessageFrom(msglines); msg.Body = GetMessageBody(msglines); newmsgs.Add(msg); DeleteMessage(n); } } Disconnect(); return newmsgs; } catch(Exception e) { return newmsgs; } } public MailMessage GetNewMessages(int nIndex) { int newcount; System.Web.Mail.MailMessage msg = new MailMessage(); try { newcount = GetNumberOfNewMessages(); Connect(); int n = nIndex+1; if(n<newcount+1) { ArrayList msglines = GetRawMessage(n); string msgsubj = GetMessageSubject(msglines); msg.Subject = msgsubj; msg.From = GetMessageFrom(msglines); msg.Body = GetMessageBody(msglines); } Disconnect(); return msg; } catch { return null; } } private ArrayList GetRawMessage (int messagenumber) { Byte[] outbytes; string input; string line = ""; input = "retr " + messagenumber.ToString() + "\r\n"; outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray()); ns.Write(outbytes,0,outbytes.Length); ArrayList msglines = new ArrayList(); do { line = sr.ReadLine(); msglines.Add(line); } while (line != "."); msglines.RemoveAt(msglines.Count-1); return msglines; } private string GetMessageSubject(ArrayList msglines) { string[] tokens; IEnumerator msgenum = msglines.GetEnumerator(); while (msgenum.MoveNext() ) { string line = (string)msgenum.Current; if(line.StartsWith("Subject:") ) { tokens = line.Split(new Char[] {' '}); return tokens[1].Trim(); } } return "None"; } private string GetMessageFrom (ArrayList msglines) { string[] tokens; IEnumerator msgenum = msglines.GetEnumerator(); while (msgenum.MoveNext() ) { string line = (string)msgenum.Current; if(line.StartsWith("From:") ) { tokens = line.Split(new Char[] {'<'}); return tokens[1].Trim(new Char[] {'<','>'}); } } return "None"; } private string GetMessageBody(ArrayList msglines) { string body = ""; string line = " "; IEnumerator msgenum = msglines.GetEnumerator(); while(line.CompareTo("") != 0) { msgenum.MoveNext(); line = (string)msgenum.Current; } while (msgenum.MoveNext() ) { body = body + (string)msgenum.Current + "\r\n"; } return body; } private void DeleteMessage(int messagenumber) { Byte[] outbytes; string input; try { input = "dele " + messagenumber.ToString() + "\r\n"; outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray()); ns.Write(outbytes,0,outbytes.Length); } catch(Exception e) { return; } } } public class SMTP { public SMTP(){} public bool Send(string strSmtpServer,int nPort,string strSend,string strReceive ,string strSubject,string strContent) { string smtpserver=strSmtpServer;// smtp服务器的IP地址 TcpClient tcpc = new TcpClient(); try { tcpc.Connect(smtpserver, nPort); StreamReader sr ; string strCmd; sr = new StreamReader(tcpc.GetStream(),Encoding.Default); //服务器连接成功以后，首先向服务器发送HeLlo命令 strCmd="HELO shaozhd"; SenSmtpCmd(tcpc,strCmd); //然后向服务器发送信件的成员的信箱 strCmd="mail from:"+ strSend; SenSmtpCmd(tcpc,strCmd); //向服务器发送收件人的信箱 strCmd="rcpt to:" + strReceive; SenSmtpCmd(tcpc,strCmd); //所有的准备工作都已经作好了,下面开始进行邮件的部分 strCmd="data"; SenSmtpCmd(tcpc,strCmd); //邮件内容 strCmd="Date: 1234567\r\n"; strCmd=strCmd+"From: " + strSend +"\r\n"; strCmd=strCmd+"To: " + strReceive +"\r\n"; strCmd=strCmd+"Subject: " + strSubject +"\r\n\r\n"; strCmd=strCmd + strContent +"\r\n\r\n"; SenSmtpCmd(tcpc,strCmd); strCmd="\r\n.\r\n"; SenSmtpCmd(tcpc,strCmd); //最后 关闭与smtp 服务器的连接 tcpc.Close(); return true; } catch { return false; } } void SenSmtpCmd(TcpClient tcpc,String strCmd) { byte[] arrCmd; string strRet; StreamReader sr; Stream s; s=tcpc.GetStream(); strCmd = strCmd + "\r\n"; arrCmd= Encoding.Default.GetBytes(strCmd.ToCharArray()); s=tcpc.GetStream(); s.Write(arrCmd, 0, strCmd.Length); //以下用于程序调试，显示服务器回应信息 sr = new StreamReader(tcpc.GetStream(), Encoding.Default); strRet=sr.ReadLine(); return; } }
}