我要获取一个需要登陆的网站的内容,请问应该怎样写?谢谢 各位高手!!我要获取一个需要登陆的网站的内容,请问应该怎样写?谢谢!! 急用!!! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 我要获取一个需要登陆的网站的内容我不知道你到底要得到什么内容webclient下载内容 不知道是不是你需要的 我试过用webClient类下载,但是不行;我的意思是这样的:如果一个网站,它首先有一个登录的界面,登录之后才进入网站首页,现在我要获取这个网站的首页内容,但是我始终获取不到其首页的内容,而每一次去获取网站首页的内容,总是得到的是网站登录页面的内容; try { CookieContainer cookieContainer = new CookieContainer(); /////////////////////////////////////////////////// // 1.打开 default.aspx 页面,获得 GetVeiwState & EventValidation /////////////////////////////////////////////////// // 设置打开页面的参数 HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; request.Method = "GET"; request.KeepAlive = false; request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"; Encoding encode = System.Text.Encoding.GetEncoding(936); // 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.UTF8); string srcString = reader.ReadToEnd(); // 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); // 获取页面的 EventValidation string eventValidationFlag = "id=\"__EVENTVALIDATION\" value=\""; i = srcString.IndexOf(eventValidationFlag) + eventValidationFlag.Length; j = srcString.IndexOf("\"", i); string eventValidation = srcString.Substring(i, j - i); /////////////////////////////////////////////////// // 2.自动填充并提交 MyLogin.aspx 页面 /////////////////////////////////////////////////// // 提交按钮的文本 string submitButton = "登陆"; // 用户名和密码 string userName = ""; string password = ""; // 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 = "txtUserName={0}&txtPwd={1}&btnLogin={2}&__VIEWSTATE={3}&__EVENTVALIDATION={4}"; string postString = string.Format(formatString, userName, password, submitButton, viewState, eventValidation); // 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(url) 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 StreamReader(responseStream, System.Text.Encoding.Default); srcString = reader.ReadToEnd(); sw.Close(); fs.Close(); } catch (WebException we) { string msg = we.Message; } C# DEBUG时,出现null exception 异常,求解释! 请问,StreamWriter使用Using语句 C#如何实现对PDF文件的内容修改?在线等待!谢谢各位大哥来赐教!!!!!!!!!!!!!!!! c# 引用 C++ DLL 问题! 全部分求一sql语句,顶者有分 splitContainer 的那个属性 可以把他设成上下分的PAN?? Windows 窗体设计 如何旋转一部分文本? 菜单问题? 关于数据流的疑问 winform中的GridView列头如何添加控件? 50分求一关于绘图位置的问题(表述不清,请进来看,顶者有分)
我不知道你到底要得到什么内容webclient下载内容 不知道是不是你需要的
它首先有一个登录的界面,登录之后才进入网站首页,现在我要获取这个网站的首页内容,但是我始终获取不到其首页的内容,而每一次去获取网站首页的内容,总是得到的是网站登录页面的内容;
try
{
CookieContainer cookieContainer = new CookieContainer(); ///////////////////////////////////////////////////
// 1.打开 default.aspx 页面,获得 GetVeiwState & EventValidation
///////////////////////////////////////////////////
// 设置打开页面的参数 HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "GET";
request.KeepAlive = false;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";
Encoding encode = System.Text.Encoding.GetEncoding(936);
// 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.UTF8);
string srcString = reader.ReadToEnd(); // 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); // 获取页面的 EventValidation
string eventValidationFlag = "id=\"__EVENTVALIDATION\" value=\"";
i = srcString.IndexOf(eventValidationFlag) + eventValidationFlag.Length;
j = srcString.IndexOf("\"", i);
string eventValidation = srcString.Substring(i, j - i); ///////////////////////////////////////////////////
// 2.自动填充并提交 MyLogin.aspx 页面
///////////////////////////////////////////////////
// 提交按钮的文本
string submitButton = "登陆"; // 用户名和密码
string userName = "";
string password = ""; // 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 = "txtUserName={0}&txtPwd={1}&btnLogin={2}&__VIEWSTATE={3}&__EVENTVALIDATION={4}";
string postString = string.Format(formatString, userName, password, submitButton, viewState, eventValidation); // 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(url) 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 StreamReader(responseStream, System.Text.Encoding.Default);
srcString = reader.ReadToEnd();
sw.Close();
fs.Close();
}
catch (WebException we)
{
string msg = we.Message;
}