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HttpWebRequest发送数据 post

2011-12-14 14:59 465 查看

1、创建HttpWebRequest对象

HttpWebRequest对象用WebRequest.Create(url)方法获得。

2、初始化HttpWebRequest对象（设置http请求常用属性）

3、附加Post给服务器的数据到HttpWebRequest对象（写入HttpWebRequest对象提供的一个stream里面）

4、读取服务器的返回信息（注意返回数据的Encoding）

string url = "";

Encoding encoding = Encoding.GetEncoding("utf-8");

byte[] bytesToPost = encoding.GetBytes("我学习WebRequest");

string cookieheader = string.Empty;

CookieContainer cookieCon = new CookieContainer();

#region 创建HttpWebRequest对象

HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(url);

#endregion

#region 初始化HtppWebRequest对象

httpRequest.CookieContainer = cookieCon;

httpRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";

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

httpRequest.Method = "POST";

if (cookieheader.Equals(string.Empty))

{

cookieheader = httpRequest.CookieContainer.GetCookieHeader(new Uri(Url));

}

else

{

httpRequest.CookieContainer.SetCookies(new Uri(Url), cookieheader);

}

#endregion

#region 附加Post给服务器的数据到HttpWebRequest对象

httpRequest.ContentLength = bytesToPost.Length;

System.IO.Stream requestStream = httpRequest.GetRequestStream();

requestStream.Write(bytesToPost, 0, bytesToPost.Length);

requestStream.Close();

#endregion

#region 读取服务器返回信息

System.IO.Stream responseStream = httpRequest.GetResponse().GetResponseStream();

string stringResponse = string.Empty;

using (System.IO.StreamReader responseReader = new System.IO.StreamReader(responseStream, Encoding.UTF8))

{

stringResponse = responseReader.ReadToEnd();

}

responseStream.Close();

#endregion

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