using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading;

namespace ConsoleApplication4
{

class Program
{
static void Main(string[] args)
{
//测试下面的信息在F12里都有
HttpHeader header = new HttpHeader();
header.accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
header.contentType = "application/x-www-form-urlencoded";//这个F12里没有，这个一定要，这个是请求头的内容类型，不然参数无法传过去。
header.method = "POST";
header.userAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36";
header.maxTry = 300;

string postString = "LoginName=admin&LoginPwd=123456";//这里即为传递的参数，可以用工具抓包分析，也可以自己分析，主要是form里面每一个name都要加进来

string html = HTMLHelper.GetHtml("http://localhost:12055/Admin/Home/MainForm", HTMLHelper.GetCooKie("http://localhost:12055/Admin/Login/CheckLogin", postString, header), header);

Console.WriteLine(html);

Console.ReadKey();
}

public class HTMLHelper
{
/// <summary>
/// 获取CooKie
/// </summary>
/// <param name="loginUrl"></param>
/// <param name="postdata"></param>
/// <param name="header"></param>
/// <returns></returns>
public static CookieContainer GetCooKie(string loginUrl, string postdata, HttpHeader header)
{
HttpWebRequest request = null;
HttpWebResponse response = null;
try
{
CookieContainer cc = new CookieContainer();
request = (HttpWebRequest)WebRequest.Create(loginUrl);
request.Method = header.method;
request.ContentType = header.contentType;
byte[] postdatabyte = Encoding.UTF8.GetBytes(postdata);
request.ContentLength = postdatabyte.Length;
request.AllowAutoRedirect = false;
request.CookieContainer = cc;
request.KeepAlive = true;

//提交请求
Stream stream;
stream = request.GetRequestStream();
stream.Write(postdatabyte, 0, postdatabyte.Length);
stream.Close();

//接收响应
response = (HttpWebResponse)request.GetResponse();
response.Cookies = request.CookieContainer.GetCookies(request.RequestUri);

CookieCollection cook = response.Cookies;
//Cookie字符串格式
string strcrook = request.CookieContainer.GetCookieHeader(request.RequestUri);

return cc;
}
catch (Exception ex)
{

throw ex;
}
}

/// <summary>
/// 获取html
/// </summary>
/// <param name="getUrl"></param>
/// <param name="cookieContainer"></param>
/// <param name="header"></param>
/// <returns></returns>
public static string GetHtml(string getUrl, CookieContainer cookieContainer,HttpHeader header)
{
Thread.Sleep(1000);
HttpWebRequest httpWebRequest = null;
HttpWebResponse httpWebResponse = null;
try
{
httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(getUrl);
httpWebRequest.CookieContainer = cookieContainer;
httpWebRequest.ContentType = header.contentType;
httpWebRequest.ServicePoint.ConnectionLimit = header.maxTry;
httpWebRequest.Referer = getUrl;
httpWebRequest.Accept = header.accept;
httpWebRequest.UserAgent = header.userAgent;
httpWebRequest.Method = "GET";
httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
Stream responseStream = httpWebResponse.GetResponseStream();
StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
string html = streamReader.ReadToEnd();
streamReader.Close();
responseStream.Close();
httpWebRequest.Abort();
httpWebResponse.Close();
return html;
}
catch (Exception e)
{
if (httpWebRequest != null) httpWebRequest.Abort();
if (httpWebResponse != null) httpWebResponse.Close();
return string.Empty;
}
}
}

public class HttpHeader
{
public string contentType { get; set; }

public string accept { get; set; }

public string userAgent { get; set; }

public string method{get;set;}

public int maxTry { get; set; }
}

}
}