使用HttpWebRequest发送POST请求

刺骨的言语ヽ痛彻心扉 2021-12-03 08:07 515阅读 0赞

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

转载于:https://www.cnblogs.com/wyux6868/archive/2009/11/11/1601140.html