C#读取POP3邮件的操作

来源：qqread 作者：出处：巧巧读书 2007-03-16 进入讨论组

关键词：
networks
server
opera
word
.net

using System.Net.Sockets;
using System.IO;
using System.Net;
using System;

class POP
{
string POPServer;
string user;
string pwd;
public POP(){}
public POP(string server, string _user, string _pwd)
{
POPServer = server;
user = _user;
pwd = _pwd;
}
private NetworkStream Connect()
{
TCPClient sender = new TCPClient(POPServer,110);
Byte[] outbytes;
string input;
NetworkStream ns = null;
try{
ns = sender.GetStream();
StreamReader sr = new StreamReader(ns);
Console.WriteLine(sr.ReadLine() );

input = "user " + user + "\r\n";
outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
ns.Write(outbytes,0,outbytes.Length) ;
Console.WriteLine(sr.ReadLine() );

input = "pass " + pwd + "\r\n";
outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
ns.Write(outbytes,0,outbytes.Length) ;
Console.WriteLine(sr.ReadLine() );

return ns;
}
catch(InvalidOperationException ioe){
Console.WriteLine("Could not connect to mail server");
return ns;
}
}
public int GetNumberOfNewMessages()
{
Byte[] outbytes;
string input;
try{
NetworkStream ns = Connect();
StreamReader sr = new StreamReader(ns);

input = "stat" + "\r\n";
outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
ns.Write(outbytes,0,outbytes.Length);
string resp = sr.ReadLine();
Console.WriteLine(resp);
string[] tokens = resp.Split(new Char[] {" "});

input = "quit" + "\r\n";
outbytes = System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
ns.Write(outbytes,0,outbytes.Length);
Console.WriteLine(sr.ReadLine());

sr.close();
ns.Close();
return tokens[1].ToInt32();
}
catch(InvalidOperationException ioe){
Console.WriteLine("Could not connect to mail server");
return 0;
}
}
public static void Main()
{
POP pop = new POP("pop-server", "loginname", "password");
Console.WriteLine("New Messages = {0}", pop.GetNumberOfNewMessages() );
Console.ReadLine();
}
}