C#通过POP3获取邮件的代码(正文和附件)

答案：使用方法: 
获取第1封邮件 
复制代码 代码如下:
 
Zgke.Net.POP3 _Popt = new Zgke.Net.POP3("192.168.0.1", 110); 
DataTable _Mail = _Popt.GetMail("zk", "zk", 1); 
 
返回DataTable 数据内容为 
Type为类型 Text为文字 如果是附件 为byte[] Name 如果是附件里存放的为文件名 
 
下面是全部的类
复制代码 代码如下:

using System; 
using System.Net.Sockets; 
using System.Net; 
using System.Security.Cryptography; 
using System.IO; 
using System.Data; 

namespace Zgke.Net 
{ 

/// <summary> 
/// 获取邮件的类 
/// zgke@sina.com 
/// qq:116149 
/// </summary> 
public class POP3 
{ 
private string m_Address = "127.0.0.1"; 

private int m_Port = 110; 

public POP3(string p_Address, int p_Port) 
{ 
m_Address = p_Address; 
m_Port = p_Port; 
} 

/// <summary> 
/// 获取Mail列表 
/// </summary> 
/// <param name="p_Name">用户名</param> 
/// <param name="p_PassWord">密码</param> 
/// <returns>Mail信息</returns> 
public DataTable GetMailTable(string p_Name,string p_PassWord) 
{ 
POP3Client _Client = new POP3Client(); 
_Client.UserName = p_Name; 
_Client.PassWord = p_PassWord; 
_Client.Client = new TcpClient(); 
_Client.Client.BeginConnect(m_Address, m_Port, new AsyncCallback(OnConnectRequest), _Client); 
while (!_Client.ReturnEnd) 
{ 
System.Windows.Forms.Application.DoEvents(); 
} 
if (_Client.Error.Length != 0) throw new Exception("错误信息!" + _Client.Error); 
return _Client.MailDataTable; 
} 


/// <summary> 
/// 获取邮件内容 
/// </summary> 
/// <param name="p_Name">名称</param> 
/// <param name="p_PassWord">密码</param> 
/// <param name="p_MailIndex">邮件编号</param> 
/// <returns>数据集</returns> 
public DataTable GetMail(string p_Name, string p_PassWord, int p_MailIndex) 
{ 
POP3Client _Client = new POP3Client(); 
_Client.UserName = p_Name; 
_Client.PassWord = p_PassWord; 
_Client.Client = new TcpClient(); 
_Client.ReadIndex = p_MailIndex; 
_Client.Client.BeginConnect(m_Address, m_Port, new AsyncCallback(OnConnectRequest), _Client); 
while (!_Client.ReturnEnd) 
{ 
System.Windows.Forms.Application.DoEvents(); 
} 
if (_Client.Error.Length != 0) throw new Exception("错误信息!" + _Client.Error); 
return _Client.MailTable; 
} 

private class POP3Client 
{ 
public TcpClient Client; 

public string UserName = ""; 

public string PassWord = ""; 

public bool ReturnEnd = false; 

public DataTable MailDataTable = new DataTable(); 

public DataTable MailTable = new DataTable(); 

public string Error = ""; 

public bool ReadEnd = false; 

public int ReadIndex = -1; 


public POP3Client() 
{ 
MailDataTable.Columns.Add("NUM"); 
MailDataTable.Columns.Add("Size"); 
MailDataTable.Columns.Add("Form"); 
MailDataTable.Columns.Add("To"); 
MailDataTable.Columns.Add("Subject"); 
MailDataTable.Columns.Add("Date"); 

MailTable.Columns.Add("Type",typeof(string)); 
MailTable.Columns.Add("Text",typeof(object)); 
MailTable.Columns.Add("Name", typeof(string)); 
} 

private int m_SendMessage = 0; 
private int m_TOPIndex = 1; 

/// <summary> 
/// 获取下一个登陆到获取列表需要的命令 
/// </summary> 
/// <param name="p_Value"></param> 
/// <returns></returns> 
public byte[] GetSendBytes(byte[] p_Value) 
{ 
ReadEnd = false; 
string _Value = System.Text.Encoding.Default.GetString(p_Value).Replace("\0", ""); 
if (_Value.IndexOf("+OK") == 0) 
{ 
m_SendMessage++; 
switch (m_SendMessage) 
{ 
case 1: 
return System.Text.Encoding.ASCII.GetBytes("USER " + UserName + "\r\n"); 
case 2: 
return System.Text.Encoding.ASCII.GetBytes("PASS " + PassWord + "\r\n"); 
case 3: 
ReadEnd = true; 
if (ReadIndex != -1) 
{ 
m_SendMessage = 5; 
return System.Text.Encoding.ASCII.GetBytes("RETR " + ReadIndex.ToString() + "\r\n"); 
} 
else 
{ 
return System.Text.Encoding.ASCII.GetBytes("LIST\r\n"); 
} 
case 4: 
string[] _List = _Value.Split(new char[] { '\r', '\n', '.' }, StringSplitOptions.RemoveEmptyEntries); 
for (int i = 1; i != _List.Length; i++) 
{ 
string[] _MaliSize = _List[i].Split(' '); 
MailDataTable.Rows.Add(new object[] { _MaliSize[0], _MaliSize[1] }); 
} 
if (MailDataTable.Rows.Count == 0) 
{ 
ReturnEnd = true; 
return new byte[0]; 
} 
else 
{ 
ReadEnd = true; 
m_TOPIndex = 1; 
return System.Text.Encoding.ASCII.GetBytes("TOP 1\r\n"); 
} 
case 5: 
System.Text.RegularExpressions.Regex _Regex = new System.Text.RegularExpressions.Regex(@"(?<=Date: ).*?(\r\n)+"); 
System.Text.RegularExpressions.MatchCollection _Collection = _Regex.Matches(_Value); 
if (_Collection.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["Date"] = GetReadText(_Collection[0].Value); 

System.Text.RegularExpressions.Regex _RegexFrom = new System.Text.RegularExpressions.Regex(@"(?<=From: ).*?(\r\n)+"); 
System.Text.RegularExpressions.MatchCollection _CollectionForm = _RegexFrom.Matches(_Value); 
if (_CollectionForm.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["Form"] = GetReadText(_CollectionForm[0].Value); 


System.Text.RegularExpressions.Regex _RegexTo = new System.Text.RegularExpressions.Regex(@"(?<=To: ).*?(\r\n)+"); 
System.Text.RegularExpressions.MatchCollection _CollectionTo = _RegexTo.Matches(_Value); 
if (_CollectionTo.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["To"] = GetReadText(_CollectionTo[0].Value); 

System.Text.RegularExpressions.Regex _RegexSubject = new System.Text.RegularExpressions.Regex(@"(?<=Subject: ).*?(\r\n)+"); 
System.Text.RegularExpressions.MatchCollection _CollectionSubject = _RegexSubject.Matches(_Value); 
if (_CollectionSubject.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["Subject"] = GetReadText(_CollectionSubject[0].Value); 

m_TOPIndex++; 
m_SendMessage--; 
ReadEnd = true; 
if (m_TOPIndex > MailDataTable.Rows.Count) 
{ 
ReturnEnd = true; 
return System.Text.Encoding.ASCII.GetBytes("QUIT"); 
} 
else 
{ 
return System.Text.Encoding.ASCII.GetBytes("TOP " + m_TOPIndex.ToString() + "\r\n"); 
} 
case 6: 
GetMailText(_Value); 
ReturnEnd = true; 
return System.Text.Encoding.ASCII.GetBytes("QUIT"); 

} 
} 
Error = _Value; 
ReturnEnd = true; 
return new byte[0]; 
} 

/// <summary> 
/// 转换文字里的字符集 
/// </summary> 
/// <param name="p_Text"></param> 
/// <returns></returns> 
public string GetReadText(string p_Text) 
{ 
System.Text.RegularExpressions.Regex _Regex = new System.Text.RegularExpressions.Regex(@"(?<=\=\?).*?(\?\=)+"); 
System.Text.RegularExpressions.MatchCollection _Collection = _Regex.Matches(p_Text); 
string _Text = p_Text; 
foreach (System.Text.RegularExpressions.Match _Match in _Collection) 
{ 
string _Value = "=?" + _Match.Value; 
if (_Value[0] == '=') 
{ 
string[] _BaseData = _Value.Split('?'); 
if (_BaseData.Length == 5) 
{ 
System.Text.Encoding _Coding = System.Text.Encoding.GetEncoding(_BaseData[1]); 
_Text = _Text.Replace(_Value, _Coding.GetString(Convert.FromBase64String(_BaseData[3]))); 
} 
} 
else 
{ 
} 
} 
return _Text; 
} 
上一个：asp.net下Repeater使用 AspNetPager分页控件
下一个：asp.net 数据库连接池浅析
更多图片编程知识:

求教：像做类似人人网中最下面的工具栏 有哪些实现方式！

请问c#中调用带指针的函数要怎么传参数进去

如果是你，钱如果真的一分都没了,能怎么办？

.net compact framework 3.5固化到win ce5.0问题

c# onclick 事件

写一个线程启动5根线程每次输出1到200之间的一个随机数
  
更多C#/ASP.NET疑问解答：
C# 数据采集
jqGrid     
VC2010 Unicode字符集下通过ReadProcessMemory跨进程读取SysListView32控件总是乱码
asp生成动画，求各位给个技术建议，或者大致方法。。。。
C#中 如何把excel的数据每一一列的值，赋值给一个一位数组呢
关于多线程同步问题.
怎么做程序小游戏
C#调用C++dll函数出现“尝试读取或写入受保护的内存”
数据同步
缓存与并发
c# 怎么把 torrent 文件 转换成 磁力链接
移动终端、软件系统、服务器关系
请都C#报表调用方式
如何重绘TabControl使其改变背景色
C#调用C++Dll异常