C# 如何将生成的XML发布到URL？

我试图将生成的XML发送到URL，但HttpWebResponse不断出现错误：

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远程服务器返回错误：（417）预期失败

这是我的密码

 //POST to URL 

            var httpRequest = (HttpWebRequest)WebRequest.Create("http://xxx.xxx.xxx.xxx:8000");
            httpRequest.Method = "POST";
            httpRequest.ContentType = "text/xml; charset=utf-8";
            httpRequest.ProtocolVersion = HttpVersion.Version11;


            //Set appropriate headers 

            var xmlWriterSettings = new XmlWriterSettings
            {
                NewLineHandling = NewLineHandling.None,
                Encoding = Encoding.ASCII
            };

            using (var requestStream = httpRequest.GetRequestStream())
            {
                xmlDoc.Save(requestStream);

            }

            using (var response = (HttpWebResponse)httpRequest.GetResponse())
            using (var responseStream = response.GetResponseStream())
            {
                // Response Code to see if the request was successful
                var responseXml = new XmlDocument();
                responseXml.Load(responseStream);
                using (var repp = XmlWriter.Create("response.xml"))
                {
                    responseXml.Save(repp);
                }
            }

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远程服务器返回错误：（417）Expectation Failed 417表示服务器无法通过

Expect

HTTP头满足客户端指示的要求。我不熟悉

HttpWebRequest

及其默认头，但您是否可以检查正在发送的实际HTTP头，特别是任何Expect头？如下所示？-虽然这与您的实际问题无关，但我想指出，声明内容类型为

“text/xml；charset=utf-8”

，然后使用

编码.ASCII

，这两者之间存在不一致之处。感谢大家设法解决了这一问题，只需将

HttpWebRequest.ProtocolVersion

更改为

HttpVersion.Version10