[转]C# HttpWebRequest 绝技
本文转自:http://www.cnblogs.com/sufei/archive/2011/05/22/2053642.html
查看全文,这里不再更新,最新版请大家访问如下地址:
http://www.sufeinet.com/thread-6-1-1.html
如果要使用中间的方法的话,可以访问我的帮助类完全免费开源:C# HttpHelper,帮助类,真正的Httprequest请求时无视编码,无视证书,无视Cookie,网页抓取
1.第一招,根据URL地址获取网页信息
先来看一下代码
get方法
{
try
{
System.Net.WebRequest wReq = System.Net.WebRequest.Create(Url);
// Get the response instance.
System.Net.WebResponse wResp = wReq.GetResponse();
System.IO.Stream respStream = wResp.GetResponseStream();
// Dim reader As StreamReader = New StreamReader(respStream)
using (System.IO.StreamReader reader = new System.IO.StreamReader(respStream, Encoding.GetEncoding(type)))
{
return reader.ReadToEnd();
}
}
catch (System.Exception ex)
{
//errorMsg = ex.Message;
}
return "";
}
post方法
///采用https协议访问网络
///</summary>
///<param name="URL">url地址</param>
///<param name="strPostdata">发送的数据</param>
///<returns></returns>
public string OpenReadWithHttps(string URL, string strPostdata, string strEncoding)
{
Encoding encoding = Encoding.Default;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL);
request.Method = "post";
request.Accept = "text/html, application/xhtml+xml, */*";
request.ContentType = "application/x-www-form-urlencoded";
byte[] buffer = encoding.GetBytes(strPostdata);
request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, 0, buffer.Length);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using( StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding(strEncoding)))
return reader.ReadToEnd();
}
这招是入门第一式, 特点:
1.最简单最直观的一种,入门课程。
2.适应于明文,无需登录,无需任何验证就可以进入的页面。
3.获取的数据类型为HTML文档。
4.请求方法为Get/Post
2.第二招,根据URL地址获取需要验证证书才能访问的网页信息
先来看一下代码
阅读全文: http://www.sufeinet.com/thread-6-1-1.html
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posted on 2013-04-09 21:11 freeliver54 阅读(329) 评论(0) 编辑 收藏 举报