C# httpwebrequest模拟浏览器提交数据
using System;using System.IO;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Configuration;
using System.Security.Cryptography;
using System.Net;
using System.Net.Sockets;
using System.Text.RegularExpressions;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;
public partial class Default4 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
CookieContainer cookieContainer = new CookieContainer();
///////////////////////////////////////////////////
// 1. 打开 MyLogin.aspx 页面，获得 GetVeiwState & EventValidation
///////////////////////////////////////////////////
// 设置打开页面的参数
string URI = "http://www.***.com";
HttpWebRequest request = WebRequest.Create(URI) as HttpWebRequest;
request.Method = "GET";
request.KeepAlive = false;
// 接收返回的页面
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
System.IO.Stream responseStream = response.GetResponseStream();
System.IO.StreamReader reader = new System.IO.StreamReader(responseStream,Encoding.Default);
string srcString = reader.ReadToEnd();
//Response.Write(srcString + "<br>");
// 获取页面的 VeiwState
string viewStateFlag = "id=\"__VIEWSTATE\" value=\"";
int i = srcString.IndexOf(viewStateFlag) + viewStateFlag.Length;
int j = srcString.IndexOf("\"", i);
string viewState = srcString.Substring(i, j - i);
Response.Write(viewState + "<br>");
string submitButton = "登录";
// 用户名和密码
string userName = "admin";
string password = "admin";
// 将文本转换成 URL 编码字符串
viewState = System.Web.HttpUtility.UrlEncode(viewState);
eventValidation = System.Web.HttpUtility.UrlEncode(eventValidation);
submitButton = System.Web.HttpUtility.UrlEncode(submitButton);
// 要提交的字符串数据。格式形如:user=uesr1&password=123
string formatString = "userid={0}&password={1}&loginButton={2}&__VIEWSTATE={3}&__EVENTVALIDATION={4}";
string postString = string.Format(formatString, userName, password, submitButton, viewState, eventValidation);
Response.Write(postString);
// 将提交的字符串数据转换成字节数组
byte[] postData = Encoding.ASCII.GetBytes(postString);
// 设置提交的相关参数
request = WebRequest.Create(URI) as HttpWebRequest;
request.Method = "POST";
request.KeepAlive = false;
request.ContentType = "application/x-www-form-urlencoded";
request.CookieContainer = cookieContainer;
request.ContentLength = postData.Length;
// 提交请求数据
System.IO.Stream outputStream = request.GetRequestStream();
outputStream.Write(postData, 0, postData.Length);
outputStream.Close();
// 接收返回的页面
response = request.GetResponse() as HttpWebResponse;
responseStream = response.GetResponseStream();
reader = new System.IO.StreamReader(responseStream, Encoding.GetEncoding("GB2312"));
srcString = reader.ReadToEnd();
Response.Write("<br>" + srcString);
foreach (Cookie cookie in response.Cookies)
cookieContainer.Add(cookie);
}
} {:4_191:} 有点高深！
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