REST in WCF - Part V (HI-REST - Exposing a service via GET - The ServiceContract and Implementation)

re: REST in WCF - Part V (HI-REST - Exposing a service via GET - The ServiceContract and Implementation)

wormster — Fri, 20 Jun 2008 19:55:50 GMT

Hi Rob

I am trying to implement an interface for the service contract:-

namespace Medquist

{

[ServiceContract(Namespace = "WCFServices")]

public interface IXDomainService

{

[OperationContract]

[WebGet(ResponseFormat = WebMessageFormat.Json)]

Medquist.PatientData SearchPAS(string userSessionId, string patientID, string patientDoB);

}

and the service...

namespace Medquist

{

public class XDomainService : IXDomainService

{

public PatientData SearchPAS(string userSessionId, string patientID, string patientDoB)

{

........

config file :-

<endpoint address="" behaviorConfiguration="XDomainServiceAspNetAjaxBehavior"

binding="webHttpBinding" contract="IXDomainService" />

</service>

</services>

However the proxy in the AJAX javascipt cannot resolve the namespace

var proxy = new WCFServices.XDomainService();

proxy.SearchPAS(......

I have specified Factory="System.ServiceModel.Activation.WebScriptServiceHostFactory" in the .svc file. Am I missing something else? Without the interface and all the attributes in place, everything works fine.

John

re: REST in WCF - Part V (HI-REST - Exposing a service via GET - The ServiceContract and Implementation)

rob.bagby — Fri, 27 Jun 2008 01:33:37 GMT

John,

If you set the WebScriptServiceHostFactory in the svc, your configurations will be ignored (or an exception will be thrown). It automatically configures the webHttpBinding with the enableWebScript endpoint behavior. If you omit this, you would need to add an endpoint behavior configured in the web.config. Something like this:

<system.serviceModel>

</behavior>

</endpointBehaviors>

</behaviors>

...

In either case, you also need to have a ScriptManager in your page with a service path configured:

<asp:ScriptManager ID="scriptManager" runat="server">

<asp:ServiceReference Path="~/YourPathToYourSvc.svc" />

</Services>

</asp:ScriptManager>

The best way to check to make sure you have everything is to rt-click the page and View Source. Look for the <script element that has "YourSvcFile.svc/js" or "YourSvcFile.svc/jsdebug". Copy that relative path to the address bar of the browser (if your svc file and page are at the root, simply replace the YourPage.aspx with YourService.svc. If you are prompted with a dialog to save the proxy file (it is javascript), you are in business. if not, Houston, there is a problem.

re: REST in WCF - Part V (HI-REST - Exposing a service via GET - The ServiceContract and Implementation)

wormster — Thu, 03 Jul 2008 19:19:17 GMT

Thanks, Rob.

The service file js indicated that the proxy was using the Interface, IXDomainService in the name space - I didn't realise that. Changing the proxy to...

var proxy = new WCFServices.IXDomainService();

...resolved the issue.

Thanks again

John

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re: REST in WCF - Part V (HI-REST - Exposing a service via GET - The ServiceContract and Implementation)

Ulhas — Tue, 30 Jun 2009 11:59:54 GMT

It's a very nice explained article about REST-WCF integration.

Thanks a lot Rob, it helped me out.