用post方法从网上抓取信息

核心提示：前些天有个要求要从某个网站上取信息,但是该网站要求用post方式访问的.现在这里贴两个google到的方法.using System.Net;static string WebClinetPost(string url, string postData,string encodeType,out string err)

前些天有个要求要从某个网站上取信息,但是该网站要求用post方式访问的.现在这里贴两个google到的方法.

using System.Net;

static string WebClinetPost(string url, string postData,string encodeType,out string err)
  {
　 string uriString = url; 
　 byte[] byteArray; 
　 byte[] responseArray; 
　 //postData = "checkvalue=32&bbb=%CD%B6%C6%B1&ilc=0&kkk=22";
　 Encoding encoding = Encoding.GetEncoding(encodeType);
　 try
　 {
　  WebClient myWebClient = new WebClient();
　  WebHeaderCollection myWebHeaderCollection; 
　  myWebClient.Headers.Add("Content-Type","application/x-www-form-urlencoded"); 
　  //myWebClient.Headers.Add("Referer","http://xxxxx/xxxxxxxxxxxxxxxxxxxxxxxx"); 
　  //myWebClient.Headers.Add("Accept-Language","zh-cn"); 
　  myWebHeaderCollection = myWebClient.Headers; 
 
　  byteArray = encoding.GetBytes(postData);
　  responseArray = myWebClient.UploadData(uriString,"POST",byteArray); 

　  err=string.Empty;
　  return encoding.GetString(responseArray);
　 }
　 catch(Exception ex)
　 {
　  err=ex.Message;
　  return string.Empty;
　 }
  }
  public static string HttpWebResponsePost(string url, string postData,string encodeType,out string err)
  {

　 Stream outstream = null;

　 Stream instream = null;

　 StreamReader sr = null;

　 HttpWebResponse response = null;

　 HttpWebRequest request = null;

　 Encoding encoding = Encoding.GetEncoding(encodeType);

　 byte[] data = encoding.GetBytes(postData);

　 try

　 {　 

　  request = WebRequest.Create(url) as HttpWebRequest;

　  CookieContainer cookieContainer = new CookieContainer();

　  request.CookieContainer = cookieContainer;

　  request.AllowAutoRedirect = true;

　  request.Method = "POST";

　  request.ContentType = "application/x-www-form-urlencoded";

　  request.ContentLength = data.Length;

　  outstream = request.GetRequestStream();

　  outstream.Write(data,0,data.Length);

　  outstream.Close();

　  response = request.GetResponse() as HttpWebResponse;
　  instream = response.GetResponseStream();
　  sr = new StreamReader( instream, encoding );
　  string content = sr.ReadToEnd();

　  err = string.Empty;
　  return content;

　 }

　 catch(Exception ex)
　 {

　  err = ex.Message;
　  return string.Empty;

　 }
  }

调用代码:
　 string url="http://xxxxxx/xxxxxxxx/scrrm00542.jsp";
　 string postData="PRoj_id=600197&theSubmit=600197";
　 string encodeType="utf-8";
　 string err="";
　 //string content=HttpWebResponsePost(url,postData,encodeType,out err);
　 string content=WebClinetPost(url,postData,encodeType,out err);

另外,再附上javascript实现的代码吧:
<script language=Javascript>
 function GetData()
 {

  var postData = "proj_id=600197&theSubmit=600197";
  var http = new GetxmlHTTPRequest();
  http.open('POST', 'http://xxxxxxxxxx/xxxxxx/scrrm00542.jsp', false);
  http.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
  http.send(postData);
 
  return http.responseText;
 }

 function GetxmlhttpRequest()
 {
  var progIDs = ["Msxml2.XMLHTTP.5.0", "Msxml2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"];
  for (var i = 0; i < progIDs.length; ++i)
  {
　 var progID = progIDs[i];
　 try
　 {
　  var x = new ActiveXObject(progID);
　  return x;
　 }
　 catch (e)
　 {}
  }
 }
</script>

http://www.cnblogs.com/lwyaster/archive/2007/01/09/615815.html