1.打开VS.NET 2003. 2.新建一个WinForm Application.
3.添加命名空间using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.IO; 4.主要代码 为了防止界面在连接服务器时死锁,我另开了一个线程private void button1_Click(object sender, System.EventArgs e)
{
Thread myThread=new Thread(new ThreadStart(TreadGet));
myThread.Start();
}private void TreadGet()
{
ConnectToServer();
LogonServer();
GetEmailList();
}//连接服务器
private void ConnectToServer()
{
this.myClient=new TcpClient();
try
{
this.myClient.Connect(this.serverNameTextBox.Text,110);
this.messageListBox.Items.Add("连接服务器成功");
//初始化网络流,数据就是通过这个对象读出来的
ns=this.myClient.GetStream();
sr=new StreamReader(ns);
sw=new StreamWriter(ns);
}
catch(Exception ex)
{
this.messageListBox.Items.Add(ex.Message);
}
}
//验证用户名,密码
private void LogonServer()
{
result=sr.ReadLine();
this.messageListBox.Items.Add(result);
sw.WriteLine("USER "+this.nameTextBox.Text);
sw.Flush(); result=sr.ReadLine();
if(result.Substring(0,3)=="-ER")
{
this.messageListBox.Items.Add("没有这个用户名");
return;
} sw.WriteLine("PASS "+this.passTextBox.Text);
sw.Flush(); try
{
result=sr.ReadLine();
}
catch(IOException ioex)
{
this.messageListBox.Items.Add(ioex.Message);
return;
} if(result.Substring(0,4)=="-ERR")
{
this.messageListBox.Items.Add("无法登录,可能使用户名密码错误!");
return;
} this.messageListBox.Items.Add("登录成功");
}//获取邮件列表
private void GetEmailList()
{
string from=null;
string subject=null;
sw.WriteLine("stat");
sw.Flush(); result=sr.ReadLine();
// MessageBox.Show(result);
string[] nummessage=result.Split(' ');
int totalnum=Convert.ToInt32(nummessage[1]);
if(totalnum>0)
this.messageListBox.Items.Add("你有"+totalnum.ToString()+"邮件");
else
this.messageListBox.Items.Add("邮箱里没有邮件"); for(int i=1;i<=totalnum;i++)
{
sw.WriteLine("top "+i.ToString()+" 0");
sw.Flush();
result=sr.ReadLine(); while(true)
{
result=sr.ReadLine();
if(result==".")
break;
if(result.Length>4)
{
if(result.Substring(0,5)=="From:")
from=result ;
if(result.Substring(0,8)=="Subject:")
subject=result ; }
}
this.listBox1 .Items.Add(i.ToString()+" "+from+ " "+ subject);
}
}private void button2_Click(object sender, System.EventArgs e)
{
this.listBox1.Items.Clear();
}
3.添加命名空间using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.IO; 4.主要代码 为了防止界面在连接服务器时死锁,我另开了一个线程private void button1_Click(object sender, System.EventArgs e)
{
Thread myThread=new Thread(new ThreadStart(TreadGet));
myThread.Start();
}private void TreadGet()
{
ConnectToServer();
LogonServer();
GetEmailList();
}//连接服务器
private void ConnectToServer()
{
this.myClient=new TcpClient();
try
{
this.myClient.Connect(this.serverNameTextBox.Text,110);
this.messageListBox.Items.Add("连接服务器成功");
//初始化网络流,数据就是通过这个对象读出来的
ns=this.myClient.GetStream();
sr=new StreamReader(ns);
sw=new StreamWriter(ns);
}
catch(Exception ex)
{
this.messageListBox.Items.Add(ex.Message);
}
}
//验证用户名,密码
private void LogonServer()
{
result=sr.ReadLine();
this.messageListBox.Items.Add(result);
sw.WriteLine("USER "+this.nameTextBox.Text);
sw.Flush(); result=sr.ReadLine();
if(result.Substring(0,3)=="-ER")
{
this.messageListBox.Items.Add("没有这个用户名");
return;
} sw.WriteLine("PASS "+this.passTextBox.Text);
sw.Flush(); try
{
result=sr.ReadLine();
}
catch(IOException ioex)
{
this.messageListBox.Items.Add(ioex.Message);
return;
} if(result.Substring(0,4)=="-ERR")
{
this.messageListBox.Items.Add("无法登录,可能使用户名密码错误!");
return;
} this.messageListBox.Items.Add("登录成功");
}//获取邮件列表
private void GetEmailList()
{
string from=null;
string subject=null;
sw.WriteLine("stat");
sw.Flush(); result=sr.ReadLine();
// MessageBox.Show(result);
string[] nummessage=result.Split(' ');
int totalnum=Convert.ToInt32(nummessage[1]);
if(totalnum>0)
this.messageListBox.Items.Add("你有"+totalnum.ToString()+"邮件");
else
this.messageListBox.Items.Add("邮箱里没有邮件"); for(int i=1;i<=totalnum;i++)
{
sw.WriteLine("top "+i.ToString()+" 0");
sw.Flush();
result=sr.ReadLine(); while(true)
{
result=sr.ReadLine();
if(result==".")
break;
if(result.Length>4)
{
if(result.Substring(0,5)=="From:")
from=result ;
if(result.Substring(0,8)=="Subject:")
subject=result ; }
}
this.listBox1 .Items.Add(i.ToString()+" "+from+ " "+ subject);
}
}private void button2_Click(object sender, System.EventArgs e)
{
this.listBox1.Items.Clear();
}
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