C# HttpWebRequest 绝技

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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

public static string GetUrltoHtml(string Url,string type)
{
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

///<summary>
///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();
}
}