另外一個ASP.NET 實現郵件發送和接受的功能（Sockets）

前臺代碼：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>

</HEAD>

<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">發件人</asp:Label>

<asp:Button id="btnSend" style="Z-INDEX: 118; LEFT: 441px; POSITION: absolute; TOP: 325px" runat="server" Width="76" Text="發送" 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">郵件主題</asp:Label>

<asp:Label id="Label7" style="Z-INDEX: 115; LEFT: 320px; POSITION: absolute; TOP: 102px" runat="server">SMTP服務器</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">密碼</asp:Label>

<asp:Label id="Label4" style="Z-INDEX: 108; LEFT: 54px; POSITION: absolute; TOP: 181px" runat="server">用戶名稱</asp:Label>

<asp:label id="Label1" style="Z-INDEX: 106; LEFT: 414px; POSITION: absolute; TOP: 18px" runat="server" Width="175px" Font-Names="隸書" Font-Size="XX-Large">發郵件</asp:label>

<asp:label id="Label2" style="Z-INDEX: 105; LEFT: 85px; POSITION: absolute; TOP: 14px" runat="server" Width="175px" Font-Names="隸書" Font-Size="XX-Large">收郵件</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服務器</asp:Label>

<asp:Button id="btnCheck" style="Z-INDEX: 110; LEFT: 67px; POSITION: absolute; TOP: 315px" runat="server" Width="76" Text="檢查" Height="25"></asp:Button>

<asp:Label id="Label6" style="Z-INDEX: 111; LEFT: 60px; POSITION: absolute; TOP: 387px" runat="server" Width="71px" Height="27px">郵件正文</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>

後臺代碼：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 的摘要說明。

/// </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)

{

// 在此處放置用戶代碼以初始化頁面

}

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('服務器連接錯誤！')</script>");

return;

}

ddlNew.Items.Clear();

for(int i=1;i<=n;i++)

ddlNew.Items.Add("第"+i.ToString()+"封郵件");

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('郵件發送成功！')</script>");

else

Response.Write("<script language='javascript'>alert('郵件發送失敗！')</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();

{

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服務器的IP地址

TcpClient tcpc = new TcpClient();

try

{

tcpc.Connect(smtpserver, nPort);

StreamReader sr ;

string strCmd;

sr = new StreamReader(tcpc.GetStream(),Encoding.Default);

//服務器連接成功以後，首先向服務器發送HeLlo命令

strCmd="HELO shaozhd";

SenSmtpCmd(tcpc,strCmd);

//然後向服務器發送信件的成員的信箱

strCmd="mail from:"+ strSend;

SenSmtpCmd(tcpc,strCmd);

//向服務器發送收件人的信箱

strCmd="rcpt to:" + strReceive;

SenSmtpCmd(tcpc,strCmd);

//所有的準備工作都已經作好了,下面開始進行郵件的部分

strCmd="data";

SenSmtpCmd(tcpc,strCmd);

//郵件內容

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);

//最後關閉與smtp 服務器的連接

　　　　　　 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);

//以下用於程序調試，顯示服務器迴應信息

　　　　sr = new StreamReader(tcpc.GetStream(), Encoding.Default);

　　　　strRet=sr.ReadLine();

　　　　return;

}

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