发送Web服务请求时出错:必须提供请求正文

Question

我已经写了下面的代码-

HttpWebRequest lHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
lHttpWebRequest.Method = "POST";
lHttpWebRequest.Headers.Add("Accept-Encoding", "gzip,deflate");
lHttpWebRequest.ContentType = "text/xml";
lHttpWebRequest.KeepAlive = false;
ASCIIEncoding lEnCoding = new ASCIIEncoding();
byte[] lData = lEnCoding.GetBytes(xmlDocument.InnerXml);
lHttpWebRequest.ContentLength = lData.Length;
HttpWebResponse lHttpWebResponse = (HttpWebResponse)lHttpWebRequest.GetResponse();

我收到错误-

You must provide a request body if you set ContentLength>0 or SendChunked==true.  Do this by calling [Begin]GetRequestStream before [Begin]GetResponse.

我在最后一行出现错误-

HttpWebResponse lHttpWebResponse = (HttpWebResponse)lHttpWebRequest.GetResponse();

Answer 1

我添加了-

ASCIIEncoding lEnCoding = new ASCIIEncoding();
byte[] lData = lEnCoding.GetBytes(xmlDocument.InnerXml);
lHttpWebRequest.ContentLength = lData.Length;
using (Stream requestStream = lHttpWebRequest.GetRequestStream())
{
requestStream.Write(lData, 0, lData.Length);
requestStream.Close();
}

这起到了作用。