#region 发送xml文件给指定网址 /// <summary> /// 发送xml文件给指定网址 /// </summary> /// <param name="v_strURL">目标Url</param> /// <param name="v_objXMLDoc">需要发送的数据(XmlDocument格式的)</param> /// <returns>服务器响应</returns> public static XmlDocument PostXMLTransaction(string v_strURL, XmlDocument v_objXMLDoc) { //set max enough to avoid http request is used out -> avoid dead while get response ServicePointManager.DefaultConnectionLimit = 200; XmlDocument XmlResponse = null; HttpWebRequest req; HttpWebResponse rep = null; Stream reqStream = null; //创建一个流对象(用来读取响应对象的内容) Stream repStream = null; XmlTextReader objXmlReader; //垃圾回收 System.GC.Collect(); req = (HttpWebRequest)WebRequest.Create(v_strURL); try { # region Start HttpRequest byte[] bytes; //传递的值 bytes = Encoding.UTF8.GetBytes(v_objXMLDoc.InnerXml); //传递的方法,必须要写,而已Get必须大写。 req.Method = "POST"; req.ContentLength = bytes.Length; //表头的格式必须要写,否则请求响应的页面得不到要传递的值 req.ContentType = "text/xml;encoding='utf-8'"; //把传递的值写到流中 reqStream = req.GetRequestStream(); reqStream.Write(bytes,0,bytes.Length); //必须要关闭请求 reqStream.Close(); #endregion End HttpRequest //创建一个响应对象,并从请求对象中得到响应对象的事例。 rep = (HttpWebResponse)req.GetResponse();//此时程序才开始向目标网页发送Post请求 //rep = req.GetResponse() as HttpWebResponse; #region Start HttpResponse //HttpStatusCode.OK,指示请求成功,且请求的信息包含在响应中 if (rep.StatusCode == HttpStatusCode.OK) { //得到回应过来的流 repStream = rep.GetResponseStream(); //Load response stream into XMLReader objXmlReader = new XmlTextReader(repStream); XmlDocument xmldoc = new XmlDocument(); xmldoc.Load(objXmlReader); XmlResponse = xmldoc; objXmlReader.Close(); } //响应关闭,要不会占用网络资源 rep.Close(); #endregion } catch (WebException we) { //异常处理 } catch (Exception ex) { //异常处理 } finally { //关闭连接 reqStream.Close(); repStream.Close(); rep.Close(); //释放对象 objXmlReader = null; reqStream = null; repStream = null; rep = null; //objHttpWebRequest = null; if (req!= null) { req.Abort(); } } return XmlResponse; } #endregion
小注:
1、Content-Type:很多时候无法解析就是Content-Type的问题。如果本身就是xml文件,请跳过这一步
动态生成的XML一定要将其设置为text/xml,否则默认就是text/html也就是普通的文本了。
2、HttpWebRequest在初始化的时候要先根据url进行创建,然后再设置Method和ContentType,然后再将请求的内容写进去,通过GetRequestStream来返回流,再向这个流中写请求内容便可以了。再通过request对象的GetResponse方法返回response对象,最后得到返回的数据流,这是通过GetResponseStream方法返回的,最后从这个流中读出返回的数据便ok了。
3、ServicePointManager.DefaultConnectionLimit Property:Gets or sets the maximum number of concurrent connections allowed by a ServicePoint object.
时间: 2024-12-05 02:28:23