通过应用程序读取网页信息的时候，通常需要抓取网页的数据，但是有一个问题就是很多网页需要登录后才能够获得页面数据，那么就需要保存当前的
cookie，在.NET中可以使用CookieContainer
对象来保存登录后的Cookie信息，每次发送数据的时候加上Cookie信息，就可以解决这个问题了。
#region 同步通过POST方式发送数据
/// <summary>
///
通过POST方式发送数据
/// </summary>
/// <param
name="Url">url</param>
/// <param
name="postDataStr">Post数据</param>
/// <param
name="cookie">Cookie容器</param>
///
<returns></returns>
public string
SendDataByPost(string Url,string postDataStr,ref CookieContainer cookie)
{
HttpWebRequest request =
(HttpWebRequest)WebRequest.Create(Url);
if (cookie.Count
== 0)
{
request.CookieContainer = new
CookieContainer();
cookie = request.CookieContainer;
}
else
{
request.CookieContainer = cookie;
}
request.Method = "POST";
request.ContentType =
"application/x-www-form-urlencoded";
request.ContentLength = postDataStr.Length;
Stream
myRequestStream = request.GetRequestStream();
StreamWriter myStreamWriter = new StreamWriter(myRequestStream,
Encoding.GetEncoding("gb2312"));
myStreamWriter.Write(postDataStr);
myStreamWriter.Close();
HttpWebResponse response =
(HttpWebResponse)request.GetResponse();
Stream
myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream,
Encoding.GetEncoding("utf-8"));
string retString=
myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
return retString;
}
#endregion
#region 同步通过GET方式发送数据
/// <summary>
/// 通过GET方式发送数据
///
</summary>
/// <param
name="Url">url</param>
/// <param
name="postDataStr">GET数据</param>
/// <param
name="cookie">GET容器</param>
///
<returns></returns>
public string
SendDataByGET(string Url, string postDataStr, ref CookieContainer
cookie)
{
HttpWebRequest request =
(HttpWebRequest)WebRequest.Create(Url +( postDataStr == "" ? "" : "?") +
postDataStr);
if (cookie.Count == 0)
{
request.CookieContainer = new CookieContainer();
cookie = request.CookieContainer;
}
else
{
request.CookieContainer = cookie;
}
request.Method = "GET";
request.ContentType =
"text/html;charset=UTF-8";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream,
Encoding.GetEncoding("utf-8"));
string retString =
myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
return retString;
}
#endregion