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       ///<summary>
       ///提交数据
       ///</summary>
       ///<paramname="userName">用户名</param>
       ///<paramname="passWord">密码</param>
       ///<paramname="code">验证码</param>
       ///<returns>提交数据后的返回值</returns>
       privatestringSubmitData(stringuserName,stringpassWord,stringcode)
       {
           try
           {
               stringurl=string.Format("http://61.142.253.40:8085/Ajax.aspx?action=Login&Name={0}&Password={1}&ucode={2}",userName,passWord,code);
               HttpWebRequestrequest=WebRequest.Create(url)asHttpWebRequest;

       privatevoidbtnRefresh_Click(objectsender,EventArgse)
       {
           FrmMain_Load(null,null);
       }

这个软件的原理是用HttpWebRequest提交带验证码的网站。

       privatevoidFrmMain_Load(objectsender,EventArgse)
       {
           //获取cookie和验证码图片
           GetCookie();
           GetImage();
       }
   }
}

       }

       //读取验证码图片
       privatevoidGetImage()
       {
           try
           {
               //验证码地址
               Uriuri=newUri("http://61.142.253.40:8085/CheckCode.aspx");
               HttpWebRequestrequest=(HttpWebRequest)HttpWebRequest.Create(uri);

       }

               //设置cookie，保证请求同步
               request.CookieContainer=cc;

               //获取响应
               HttpWebResponseresponse=request.GetResponse()asHttpWebResponse;
               if(response.StatusCode==HttpStatusCode.OK)
               {
                   //注意这里要根据网站编码格式变换
                   using(StreamReadersr=newStreamReader(response.GetResponseStream(),Encoding.GetEncoding("UTF-8")))
                   {
                       returnsr.ReadToEnd();
                   }
               }
               else
               {
                   returnresponse.StatusCode.ToString();
               }
           }
           catch
           {
               returnnull;
           }

       privatevoidbtnSubmit_Click(objectsender,EventArgse)
       {
          txtResult.Text=SubmitData(txtUser.Text,txtPassword.Text,txtCode.Text);
       }

usingSystem;
usingSystem.Drawing;
usingSystem.IO;
usingSystem.Net;
usingSystem.Text;
usingSystem.Windows.Forms;

要用post提交带验证码的地址。先用HttpWebRequest进行请求以得到cookie，并保存起来在后面获取验证码的时候使用.

               //得到验证码数据流
               StreamresStream=response.GetResponseStream();

       privatevoidlbWebSite_Click(objectsender,EventArgse)
       {
           try
           {
               System.Diagnostics.Process.Start("http://www.weixq.cn");
               System.Diagnostics.Process.Start("http://www.jfkjw.com");
           }
           catch{}
       }

       //用于保存cookie
       CookieContainercc=newCookieContainer();预测足球

               //将当前cookie存储到CookieContainer中
               cc.Add(response.Cookies);
               response.Close();
           }
           catch{}
       }

       privatevoidForm1_Load(objectsender,EventArgse)
       {

       privatevoidlbQQ_Click(objectsender,EventArgse)
       {
           try
           {
               System.Diagnostics.Process.Start("http://wpa.qq.com/msgrd?v=3&uin=240452625&site=qq&menu=yes");
           }
           catch{}
       }

       //获取cookie
       privatevoidGetCookie()
       {
           try
           {
               //要post提交的地址。先用HttpWebRequest进行请求以得到cookie，并保存起来在后面获取验证码的时候使用
               Uriuri=newUri("http://61.142.253.40:8085/Login.aspx");
               HttpWebRequestrequest=(HttpWebRequest)HttpWebRequest.Create(uri);
               HttpWebResponseresponse=(HttpWebResponse)request.GetResponse();

               //设置前面请求时保存下来的cookie，以保证两个请求是相同的，才不会出现验证码不同步的问题
               request.CookieContainer=cc;
               HttpWebResponseresponse=(HttpWebResponse)request.GetResponse();

               //初始化Bitmap图片并在pictureBox1控件中显示
               Bitmapimage=newBitmap(resStream);
               this.pictureBox1.Image=image;
           }
           catch{}
       }

namespace用POST提交带验证码的网站
{
   publicpartialclassFrmMain:Form
   {
       publicFrmMain()
       {
           InitializeComponent();
       }