200分webRequest 怎么获取和保持cookies

200分求教：webRequest 如何获取和保持cookies!
需求：想在内部系统加入google检索，用webrequest获取结果，然后按我自己的格式显示结果。我想让google按照http://www.google.cn/preferences?hl=zh-CN中设置，返回结果。

最好能用WebRequest获取cookies然后，每次检索都带上cookies，最好不用webbrowse.

请高手帮助！

[解决办法]
http://www.cnblogs.com/goody9807/archive/2008/06/26/1107560.html
[解决办法]
WebRequest是获取一个url即外界的信息的，cookie是你本机上的东西，检索的时候带上cookie是什么意思呢 ？
[解决办法]
程序想网页传递参数用post

探讨

http://www.cnblogs.com/goody9807/archive/2008/06/26/1107560.html

[解决办法]
public static void Main(string[] args)
{
if (args == null || args.Length != 1)
{
Console.WriteLine("Specify the URL to receive the request.");
Environment.Exit(1);
}
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(args[0]);
request.CookieContainer = new CookieContainer();

HttpWebResponse response = (HttpWebResponse) request.GetResponse();



// Print the properties of each cookie.
foreach (Cookie cook in response.Cookies)
{
Console.WriteLine("Cookie:");
Console.WriteLine("{0} = {1}", cook.Name, cook.Value);
Console.WriteLine("Domain: {0}", cook.Domain);
Console.WriteLine("Path: {0}", cook.Path);
Console.WriteLine("Port: {0}", cook.Port);
Console.WriteLine("Secure: {0}", cook.Secure);

Console.WriteLine("When issued: {0}", cook.TimeStamp);
Console.WriteLine("Expires: {0} (expired? {1})", 
cook.Expires, cook.Expired);
Console.WriteLine("Don't save: {0}", cook.Discard);
Console.WriteLine("Comment: {0}", cook.Comment);
Console.WriteLine("Uri for comments: {0}", cook.CommentUri);
Console.WriteLine("Version: RFC {0}" , cook.Version == 1 ? "2109" : "2965");

// Show the string representation of the cookie.
Console.WriteLine ("String: {0}", cook.ToString());
}
}

[解决办法]

探讨

程序想网页传递参数用post
引用:
http://www.cnblogs.com/goody9807/archive/2008/06/26/1107560.html

[解决办法]
设置CookieContainer属性就可以，这个值默认是null，当它为null代表不接受cookie。


[解决办法]
注意WebRequest不支持cookie的，但是HttpWebRequest，你可以显式地置换一下。
[解决办法]

C# code

HttpWebRequest w = (HttpWebRequest)WebRequest.Create("http://www.google.cn");CookieContainer cookie = new CookieContainer();w.CookieContainer = cookie;//...
[解决办法]
C# code
        public string Login(string url, string usr, string pass)        {            string Return = null;            this.LoginUrl = url;            string loginstr = "rl=%2Fhome%2F&email=" + usr + "&password=" + pass;            loginstr = EncodePost(loginstr);            byte[] replybyte = Encoding.UTF8.GetBytes(loginstr);            try            {                CookieContainer sparkc = new CookieContainer();                SparkRequest = (HttpWebRequest)WebRequest.Create(url);                SparkRequest.CookieContainer = sparkc;                SparkRequest.ContentType = "application/x-www-form-urlencoded";                SparkRequest.Method = "POST";                SparkRequest.ContentLength = replybyte.Length;                Stream newStream = SparkRequest.GetRequestStream();                newStream.Write(replybyte, 0, replybyte.Length);                newStream.Close();                SparkResponse = (HttpWebResponse)SparkRequest.GetResponse();                Stream dataStream = SparkResponse.GetResponseStream();                StreamReader reader = new StreamReader(dataStream, Encoding.GetEncoding("UTF-8"));                Return = reader.ReadToEnd();                foreach (Cookie temp in SparkResponse.Cookies)                {                    if (temp.Domain != "www.xxxxxxx.com")                        temp.Domain = "www.xxxxxxxxxx.com";                }                CkCollection = SparkResponse.Cookies; // 这句            }            catch            {                return null;            }            return Return;        } 
 
[解决办法]
学习
[解决办法]
              
HttpWebRequest hreq=null;
CookieContainer cCookie = new CookieContainer();
private string SendRequest(string _url,string _requestString)
 {
  try
  {
   byte[] requestBytes  =  System.Text.Encoding.GetEncoding("GB2312").GetBytes(_requestString);  
   hreq= (HttpWebRequest)WebRequest.Create(_url); 
   hreq.ContentType  =  "application/x-www-form-urlencoded"; 
   hreq.ContentLength= requestBytes.Length;
   hreq.Method  =  "POST"; 
   hreq.CookieContainer  =  cCookie; 
   using(Stream writer =  hreq.GetRequestStream()) 
   { 
    writer.Write(requestBytes,0,requestBytes.Length);
   }
}

[解决办法]
学到 不少东西
[解决办法]
hreq.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)";   
//或  hreq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";   
//或  hreq.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.2; zh-CN; rv:1.8.1.7) Gecko/20070914 Firefox/2.0.0.7"  
是否频繁获取，有可能被禁用 

 

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