SOAP请求从Windows服务

问题描述：

public static string SubmitSoapRequest(string url, 
                 string ns, 
                 string operation, 
                 string requestXml, 
                 bool responseNodeOnly) 
    { 
     // make sure the namespace has a trailing slash 
     ns = ns.TrimEnd('/') + '/'; 

     // format soap request 
     string soap = string.Format(SOAP_REQUEST_XML, ns, operation, requestXml); 

     // format soap action 
     string soapAction = string.Format(@"{0}{1}", ns, operation); 

     // initialize web request 
     HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url); 

     // add header and other soap params 
     req.Headers.Add("SOAPAction", soapAction); 
     req.ContentType = @"text/xml;charset=""utf-8"""; 
     req.Accept = "text/xml"; 
     req.Method = "POST"; 

     // make soap request 
     using (Stream s = req.GetRequestStream()) 
     using (StreamWriter sw = new StreamWriter(s)) 
      sw.Write(soap); 

     // get response from remote web-service 
     WebResponse response = req.GetResponse();

从编译的Windows应用程序运行时，该工作正常创建SOAP请求，但是从Windows服务调用时失败。从异常中捕获'500内部服务器错误'。

是否有任何理由为什么通过Windows服务运行可能导致这种情况？

在此先感谢您的帮助/咨询

答

没有看到发生了什么事情的服务，我最初的猜测是，它的凭据相关。远程服务是否需要特定的访问凭据？当您将代码作为Windows应用运行时，传递给该服务的凭证可能是您的网络凭证;但该服务正在传递凭据（网络服务）。

在提出服务请求之前，您可能需要在请求中设置适当的凭据。下面是我下车MSDN一个例子：

CredentialCache myCredentialCache = new CredentialCache(); 
myCredentialCache.Add(new Uri("http://foo.com/"),"Basic", new NetworkCredential("user1","passwd1","domain1")); 
WebRequest myWebRequest = WebRequest.Create("http://foo.com"); 
NetworkCredential myCredential = myCredentialCache.GetCredential(new Uri("http://foo.com"),"Basic"); 
myWebRequest.Credentials = myCredential; 
WebResponse myWebResponse = myWebRequest.GetResponse();

没有看到该服务，这将是一些根据您所描述的情况初步调查。我希望这有帮助！！

SOAP请求从Windows服务

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