private string HttpPost( stringUrl,string postDataStr)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
request.Method ="POST";
request.ContentType ="application/x-www-form-urlencoded";
request.ContentLength = Encoding.UTF8.GetByteCount(postDataStr);
request.CookieContainer = cookie;
Stream myRequestStream = request.GetRequestStream();
StreamWriter myStreamWriter =newStreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
myStreamWriter.Write(postDataStr);
myStreamWriter.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
response.Cookies = cookie.GetCookies(response.ResponseUri);
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader =newStreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
stringretString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
returnretString;
}
publicstringHttpGet(stringUrl,stringpostDataStr)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr ==""?"":"?") + postDataStr);
request.Method ="GET";
request.ContentType ="text/html;charset=UTF-8";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader =newStreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
stringretString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
returnretString;
}
在post的时候有时也用的到cookie，像登录163发邮件时候就需要发送cookie，所以在外部一个cookie属性随时保存 CookieContainer cookie = new CookieContainer();
！注意：有时候请求会重定向，但我们就需要从重定向url获取东西，像QQ登录成功后获取sid，但上面的会自动根据重定向地址跳转。我们可以用:
request.AllowAutoRedirect = false;设置重定向禁用，你就可以从headers的Location属性中获取重定向地址
