ASMX web service and The remote server returned an error: (500) Internal Server Error issue

Question

i have developed a very small web service and which is hosted along with our web site. our webservice url is
http://www.bba-reman.com/Search/SearchDataIndex.asmx
web service code
namespace WebSearchIndex
#region SearchDataIndex
/// <summary>
/// SearchDataIndex is web service which will call function exist in another library for part data indexing
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
// [System.Web.Script.Services.ScriptService]
public class SearchDataIndex : System.Web.Services.WebService
//public AuthHeader ServiceAuth=null;
public class AuthHeader : SoapHeader
public string Username;
public string Password;
#region StartIndex
/// <summary>
/// this function will invoke CreateIndex function of SiteSearch module to reindex the data
/// </summary>
[WebMethod]
public string StartIndex(AuthHeader auth)
string strRetVal = "";
if (auth.Username == "Admin" && auth.Password == "Admin")
strRetVal = SiteSearch.CreateIndex(false);
else
SoapException se = new SoapException("Failed : Invalid credentials",
SoapException.ClientFaultCode,Context.Request.Url.AbsoluteUri,new Exception("Invalid credentials"));
throw se;
return strRetVal;
#endregion
#endregion
when i was calling that web service from my win apps using
HttpWebRequest
class then getting error The remote server returned an error: (500) Internal Server Error
here is code of my win apps from where i am calling web service
string strXml = "";
strXml = "<s:Envelope xmlns:s='http://schemas.xmlsoap.org/soap/envelope/'><s:Body><StartIndex xmlns='http://tempuri.org/' xmlns:i='http://www.w3.org/2001/XMLSchema-instance'><auth><Username>joy</Username><Password>joy</Password></auth></StartIndex></s:Body></s:Envelope>";
string url = "http://www.bba-reman.com/Search/SearchDataIndex.asmx";
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.ContentType = "text/xml";
req.KeepAlive = false;
req.ContentLength = strXml.Length;
StreamWriter streamOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
streamOut.Write(strXml);
streamOut.Close();
StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
string strResponse = streamIn.ReadToEnd();
streamIn.Close();
i am just not being able to understand when this line execute
StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
then getting the error The remote server returned an error: (500) Internal Server Error
not being able to understand where i made the mistake. mistake is in the code of web service end or in calling code?
help me to fix this issue. thanks

Answer 1

Hi Mou,
I just tried your win app code about calling web service, but failed. I got the 500 error after I called your service:
The error message I quoted from Fiddler:
<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><soap:Fault><faultcode>soap:Client</faultcode><faultstring>System.Web.Services.Protocols.SoapException: Failed : Invalid credentials ---&gt; System.Exception: Invalid credentials
--- End of inner exception stack trace ---
at BBAReman.WebSearchIndex.SearchDataIndex.StartIndex(AuthHeader auth)</faultstring><faultactor>http://www.bba-reman.com/Search/SearchDataIndex.asmx</faultactor><detail /></soap:Fault></soap:Body></soap:Envelope>
I am not totally sure that error occurred by the authentication. But I suggest you can try to add this service into your project using this method below:
1.right click the Reference and select Add Service Reference
2.input your service link and click "Go"
And you can use this service as the following:
private async void callService()
ServiceReference1.SearchDataIndexSoapClient client =new ServiceReference1.SearchDataIndexSoapClient();
var Str= await client.StartIndexAsync(new ServiceReference1.AuthHeader { Username = "Admin", Password = "Admin" });
Please try it.
Regards,
Will
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