Error downloading metadata from the address when adding web service reference

Mike Lusicic · May 22, 2019

I am using Visual Studio 2017 Professional.

I have a solution with several projects. One is the web service and one is the consumer of that web service.

I have a successful build on the web service.

When I try to add the web service to the consumer project, I do the following:

Right click on the project and select Add / Service Reference ...
Click on Discover. The Address is populated with http://localhost:61162/RS_CaseStudyServices.svc. The Services are listed under Services with a message of 2 service(s) found in the solution.
Highlight the service I want
Click on OK

At that point I get a message box with the subject error: Error downloading metadata from the address. There is a message in the Add Service Reference box that says: An error (Details)occurred while attempting to find services at 'http://61162/RS_Data_Service.svc'

When I click on Details I get the following:

There was an error downloading 'http://localhost:61162/RS_Data_Service.svc/$metadata'.
The request failed with the error message:
--
<!DOCTYPE html>
<html>
<head>
<title>The type 'RS_WebServices.RS_Data_Service', provided as the Service attribute value in the ServiceHost directive, or provided in the configuration element system.serviceModel/serviceHostingEnvironment/serviceActivations could not be found.</title>
<meta name="viewport" content="width=device-width" />
<style>
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p {font-family:"Verdana";font-weight:normal;color:black;margin-top: -5px}
b {font-family:"Verdana";font-weight:bold;color:black;margin-top: -5px}
H1 { font-family:"Verdana";font-weight:normal;font-size:18pt;color:red }
H2 { font-family:"Verdana";font-weight:normal;font-size:14pt;color:maroon }
pre {font-family:"Consolas","Lucida Console",Monospace;font-size:11pt;margin:0;padding:0.5em;line-height:14pt}
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.version {color: gray;}
.error {margin-bottom: 10px;}
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@media screen and (max-width: 639px) {
pre { width: 440px; overflow: auto; white-space: pre-wrap; word-wrap: break-word; }
}
@media screen and (max-width: 479px) {
pre { width: 280px; }
}
</style>
</head>

<body bgcolor="white">

<span><H1>Server Error in '/' Application.<hr width=100% size=1 color=silver></H1>

<h2> <i>The type 'RS_WebServices.RS_Data_Service', provided as the Service attribute value in the ServiceHost directive, or provided in the configuration element system.serviceModel/serviceHostingEnvironment/serviceActivations could not be found.</i> </h2></span>

<font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">

<b> Description: </b>An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

<br><br>

<b> Exception Details: </b>System.InvalidOperationException: The type 'RS_WebServices.RS_Data_Service', provided as the Service attribute value in the ServiceHost directive, or provided in the configuration element system.serviceModel/serviceHostingEnvironment/serviceActivations could not be found.<br><br>

<b>Source Error:</b> <br><br>

<table width=100% bgcolor="#ffffcc">
<tr>
<td>
<code>

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.</code>

</td>
</tr>
</table>

<br>

<b>Stack Trace:</b> <br><br>

<table width=100% bgcolor="#ffffcc">
<tr>
<td>
<code><pre>

[InvalidOperationException: The type 'RS_WebServices.RS_Data_Service', provided as the Service attribute value in the ServiceHost directive, or provided in the configuration element system.serviceModel/serviceHostingEnvironment/serviceActivations could not be found.]
System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String constructorString, Uri[] baseAddresses) +60098
System.ServiceModel.HostingManager.CreateService(String normalizedVirtualPath, EventTraceActivity eventTraceActivity) +1421
System.ServiceModel.HostingManager.ActivateService(ServiceActivationInfo serviceActivationInfo, EventTraceActivity eventTraceActivity) +52
System.ServiceModel.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath, EventTraceActivity eventTraceActivity) +641

[ServiceActivationException: The service '/RS_Data_Service.svc' cannot be activated due to an exception during compilation. The exception message is: The type 'RS_WebServices.RS_Data_Service', provided as the Service attribute value in the ServiceHost directive, or provided in the configuration element system.serviceModel/serviceHostingEnvironment/serviceActivations could not be found..]
System.Runtime.AsyncResult.End(IAsyncResult result) +500298
System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result) +174
System.ServiceModel.Activation.ServiceHttpHandler.EndProcessRequest(IAsyncResult result) +11
System.Web.CallHandlerExecutionStep.InvokeEndHandler(IAsyncResult ar) +152
System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath, EventTraceActivity eventTraceActivity) +73
System.ServiceModel.Activation.HostedHttpRequestAsyncResult.HandleRequest() +551
System.ServiceModel.Activation.HostedHttpRequestAsyncResult.BeginRequest() +386
System.ServiceModel.Activation.HostedHttpRequestAsyncResult.OnBeginRequest(Object state) +66
</pre></code>

</td>
</tr>
</table>

<br>

<hr width=100% size=1 color=silver>

<b>Version Information:</b> Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3282.0

</font>

</body>
</html>

--.
Metadata contains a reference that cannot be resolved: 'http://localhost:61162/RS_Data_Service.svc'.
The requested service, 'http://localhost:61162/RS_Data_Service.svc' could not be activated. See the server's diagnostic trace logs for more information.
If the service is defined in the current solution, try building the solution and adding the service reference again.

I have doing a build on the solution again, but I still get the same error. What do I do to get this resolved?

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Error downloading metadata from the address when adding web service reference

Mike Lusicic

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