远程登陆，带验证码

    通过一个winform 界面实现远程登录网站 带验证码，别的不说了，下附开放代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
using System.Threading;

namespace FLY.SZSB
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Fly.WebLogo.UrlLogoin login = new Fly.WebLogo.UrlLogoin();

        private void button1_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(this.txtID.Text.Trim()))
            {
                MessageBox.Show("身证不能为空");
                this.txtID.Focus();
                return;
            }
            else if (string.IsNullOrEmpty(this.txtComputer.Text.Trim()))
            {
                MessageBox.Show("电脑号不能为空");
                this.txtComputer.Focus();
                return;
            }
            else if (string.IsNullOrEmpty(this.txtCode.Text.Trim()))
            {
                MessageBox.Show("验证码不能为空");
                this.txtCode.Focus();
                return;
            }

            string url = "http://wssb2.szsi.gov.cn/NetApplyWeb/personacctoutResult.jsp";
            string post = string.Format("id={0}&bacode={1}&PSINPUT={2}", this.txtID.Text, this.txtComputer.Text, this.txtCode.Text.Trim());

            oneData = Encoding.Default.GetBytes(post);
            Uri uri = new Uri(url);
            myHttpWebRequest = (HttpWebRequest)WebRequest.Create(uri);//请求的URL
            myHttpWebRequest.CookieContainer = Cookies;//*发送COOKIE
            myHttpWebRequest.Method = "POST";
            myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";
            myHttpWebRequest.ContentLength = oneData.Length;
            Stream newMyStream = myHttpWebRequest.GetRequestStream();
            newMyStream.Write(oneData, 0, oneData.Length);

            try
            {
                HttpWebResponse response = (HttpWebResponse)myHttpWebRequest.GetResponse();
                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.Default);

                string str = sr.ReadToEnd();

                string msg = string.Empty;
                if (!Test(str, out msg))
                {
                    this.lblResult.Text = msg;
                }
                else
                {
                    LoadResult(str);
                }

            }
            catch (Exception ex)
            {
                this.lblResult.Text = ex.Message;
            }


        }

        //判断错误
        public bool Test(string str, out string msg)
        {
            msg = "";
            if (str.IndexOf("验证码不正确") > -1)
            {
                msg = "验证码不正确";
                this.txtCode.Focus();
               
                return false;
            }
            else
            {
                return true;
            }


        }

        //显示结果
        private void LoadResult(string str)
        {
            if (str.IndexOf("没有查询到数据") > 0)
            {
                this.lblResult.Text = "没有查询到数据";
            }
            else if (str.IndexOf("参保情况") > 0)
            {
                List<string> list = GetHtmlImageUrlList(str);

                StringBuilder sb = new StringBuilder("参保情况:\r\n");
                for (int i = 0; i < list.Count; i++)
                {
                    if ((i + 1) % 2 == 0)
                    {
                        sb.Append(list[i] + "\r\n");
                    }
                    else
                    {
                        sb.Append(list[i]);
                    }
                }
                this.lblResult.Text = sb.ToString();
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            List<string> list = GetHtmlImageUrlList("<table border='0' cellpadding='1' cellspacing='1' width='660'><tr height='19' bgcolor='#fbecbb'><td colspan='4' height='19'>参保情况</td></tr><tr height='19' bgcolor='#d2eeff'><td height='19' width='161' align='right'>当前缴费状态标记:</td><td height='19' width='185' align='left' colspan='3'>正常</td><td height='19' width='185' align='left' colspan='3'>正常</td></tr></table>");

            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < list.Count; i++)
            {
                if ((i + 1) % 2 == 0)
                {
                    sb.Append(list[i] + "\r\n");
                }
                else
                {
                    sb.Append(list[i]);
                }
            }
            this.lblResult.Text = sb.ToString();

        }

        /// <summary> 
        /// 取得HTML中所有图片的 URL。 
        /// </summary> 
        /// <param name="sHtmlText">HTML代码</param> 
        /// <returns>图片的URL列表</returns> 
        public List<string> GetHtmlImageUrlList(string sHtmlText)
        {
            sHtmlText = sHtmlText.Replace("\"", "'");
            // Regex regImg = new Regex(@"<img\b[^<>]*?\bsrc[\s\t\r\n]*=[\s\t\r\n]*[""']?[\s\t\r\n]*(?<imgUrl>[^\s\t\r\n""'<>]*)[^<>]*?/?[\s\t\r\n]*>", RegexOptions.IgnoreCase);
            // 定义正则表达式用来匹配 img 标签 
            string reg = @"<td[^>].*?>(?<content>[^<>]+)</td>";
            Regex regImg = new Regex(reg, RegexOptions.IgnoreCase);

            // 搜索匹配的字符串 
            MatchCollection matches = regImg.Matches(sHtmlText);

            List<string> sUrlList = new List<string>();

            // 取得匹配项列表 
            foreach (Match match in matches)
            {
                string temp = match.Result("$1").Replace("\r\n", "").Replace("\t", "").Trim();
                if (temp.IndexOf("nbsp") == -1)
                {
                    sUrlList.Add(temp);
                }
            }
            return sUrlList;
        }

        //加载验证码
        private void Form1_Load(object sender, EventArgs e)
        {
            Thread t1 = new Thread(new ThreadStart(LoadCookie));
            t1.Start();


            Thread t2 = new Thread(new ThreadStart(LoadCodeImg));
            t2.Start();


        }


        private void LoadCodeImg()
        {
            try
            {
                string oneUrl = "http://wssb2.szsi.gov.cn/NetApplyWeb/CImages";

                myHttpWebRequest = (HttpWebRequest)WebRequest.Create(oneUrl);//请求的URL
                myHttpWebRequest.CookieContainer = Cookies;//*发送COOKIE
                myHttpWebRequest.Method = "GET";
                myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";

                //获取返回资源
                HttpWebResponse response = (HttpWebResponse)myHttpWebRequest.GetResponse();

                //获取流
                Image bitmapImage = Bitmap.FromStream(response.GetResponseStream()) as Bitmap;

                this.pictureBox1.Image = bitmapImage;
            }
            catch (Exception ex)
            {
                //if (this.lblResult.InvokeRequired)
                //{
                //    SetLabelTextDelegate sss = new SetLabelTextDelegate(SetLabelText);
                //    this.Invoke(sss, ex.Message);
                //}
                //else
                //{
                //    this.lblResult.Text = ex.Message;
                //}

            }
        }

        //更改验证码
        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            Thread t3 = new Thread(new ThreadStart(LoadCodeImg));
            t3.Start();
            this.lblResult.Text = "";
        }

        CookieContainer Cookies = new CookieContainer();
        HttpWebRequest myHttpWebRequest;
        byte[] oneData = { };


        /// <summary>
        /// 加载Cookie
        /// </summary>
        private void LoadCookie()
        {
            try
            {
                string oneUrl = "http://wssb2.szsi.gov.cn/NetApplyWeb/personacctoutInput.jsp";

                myHttpWebRequest = (HttpWebRequest)WebRequest.Create(oneUrl);//请求的URL
                myHttpWebRequest.CookieContainer = Cookies;//*发送COOKIE
                myHttpWebRequest.Method = "POST";
                myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";
                myHttpWebRequest.ContentLength = oneData.Length;
                Stream newMyStream = myHttpWebRequest.GetRequestStream();
                newMyStream.Write(oneData, 0, oneData.Length);
            }
            catch (Exception ex)
            {
                //if (this.lblResult.InvokeRequired)
                //{
                //    SetLabelTextDelegate sss = new SetLabelTextDelegate(SetLabelText);
                //    this.Invoke(sss, ex.Message);
                //}
                //else
                //{
                //    this.lblResult.Text = ex.Message;
                //}

            }
        }

        
        delegate void SetLabelTextDelegate(Label lb1, string txt);
         
        private void SetLabelText(Label lab, string msg)
        {
            lab.Text = msg;
        }
    }
}