pop3接收邮件（asp.net）

2025-02-14 技术教程

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Text;using System.Net;using System.Net.Sockets;using System.IO;
public partial class _Default : System.Web.UI.Page{ public static string pwd; public static int k; public static TcpClient tcpc; public static string popserver; public static StreamReader sr; public static string strRet; public static string[] arrRet;
protected void Page_Load(object sender, EventArgs e) { }
protected void Button1_Click(object sender, EventArgs e) { string user = TextBox2.Text.ToString(); string pass = TextBox3.Text.ToString(); pwd = pass; popserver = TextBox1.Text.ToString(); tcpc = new TcpClient(); try { tcpc.Connect(popserver, 110); sr = new StreamReader(tcpc.GetStream(), Encoding.Default); Response.Write(sr.ReadLine() + ""); strRet = logon(tcpc, user, pass); if (JudgeString(strRet) != "+OK") {
Response.Write("没有这个用户名/密码不匹配"); return; } arrRet = StaticMailBox(tcpc); if (arrRet[0] != "+OK") { Response.Write("出错了"); return; } Response.Write("当前用户" + user + "的信箱中共有" + arrRet[1] + "封，共占" + arrRet[2] + "Byte"); k = Convert.ToInt32(arrRet[1]); } catch (Exception ex) { Response.Write("连接服务器失败"); }
}
private string logon(TcpClient tcpc, string user, string pass) { string strRet; strRet = SendPopCmd(tcpc, "user " + user); strRet = SendPopCmd(tcpc, "pass " + pass); return strRet;
} private string SendPopCmd(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); sr = new StreamReader(tcpc.GetStream(), Encoding.Default); strRet = sr.ReadLine(); return strRet; }
private string JudgeString(string strCheck) { if (strCheck.Substring(0, 3) != "+OK") { return "-ERR"; } else { return "+OK"; } }
private string[] StaticMailBox(TcpClient tcpc) { string strRet; strRet = SendPopCmd(tcpc, "stat"); if (JudgeString(strRet) != "+OK") { return "-ERR -ERR".Split("".ToCharArray()); } else { string[] arrRet = strRet.Split("".ToCharArray()); return arrRet; } } protected void Button2_Click(object sender, EventArgs e) { if (Convert.ToInt32(TextBox4.Text) > k || Convert.ToInt32(TextBox4.Text) <= 0) { Page.RegisterClientScriptBlock("","<script>alert('输入的索引错误')</script>"); }else{ string[] arrRets; arrRets=PopMail(tcpc,Convert.ToInt32(TextBox4.Text)); TextBox5.Text="当前是第"+TextBox4.Text+"封信"+"\n"+"邮件日期："+arrRets[1]+"\n"+"发信人："+arrRets[2]+"\n"+"收信人："+arrRets[3]+"\n"+"邮件主题"+arrRets[4]+"\n"+"邮件内容："+arrRets[5]+"\n"; Literal1.Text = "当前是第" + TextBox4.Text + "封信" + "\n" + "邮件日期：" + arrRets[1] + "\n" + "发信人：" + arrRets[2] + "\n" + "收信人：" + arrRets[3] + "\n" + "邮件主题" + arrRets[4] + "\n" + "邮件内容：" + arrRets[5] + "\n"; for (int j = 0; j < arrRets.Length; j++) { Response.Write(arrRets[j]); } } }
private string[] PopMail(TcpClient tcpc, int i) { string strRet; string[] arrRet = new string[20]; bool strBody = false; string[] arrTemp; strRet = SendPopCmd(tcpc, "retr " + i.ToString()); if (JudgeString(strRet) != "+OK") { return "-ERR ERR".Split("".ToCharArray()); } StreamReader sr; sr = new StreamReader(tcpc.GetStream(), Encoding.Default); Response.Write("\n "); Response.Write("\n "); arrRet[0] = "+OK"; while (sr.Peek() != 46) { strRet = sr.ReadLine(); arrTemp = strRet.Split(":".ToCharArray()); if (strRet == "") strBody = true; if (arrTemp[0] == "Date") arrRet[1] = arrTemp[1]; if (arrTemp[0]=="From") arrRet[2]=(arrTemp[1].Substring(arrTemp[1].LastIndexOf("<")+1)).Replace(">",""); if (arrTemp[0]=="To") arrRet[3]=(arrTemp[1].Substring(arrTemp[1].LastIndexOf("<")+1)).Replace(">",""); if (arrTemp[0]=="Subject") arrRet[4]=arrTemp[1].ToString(); if(strBody) arrRet[5]=arrRet[5]+strRet+"\n";
} return arrRet; } }