WCF response in JSON instead of JSONP

Allright, I'm using a WCF service to handle requests from my web app and respond with a JSONP format. I tried all the solutions I could find, studied the documentation (http://msdn.microsoft.com/en-us/library/ee834511.aspx#Y200) and the example project.

The problem is the response object (json) does not get wrapped with the callback supplied in the URL.

Request is like:

http://localhost/socialApi/socialApi.svc/api/login?callback=callback&username=AAAAA&password=BBBB 

Web.config looks like:

<?xml version="1.0"?> <configuration> <system.web> <trace enabled="true"/> <compilation debug="true" targetFramework="4.0"><assemblies><add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=*************" /></assemblies></compilation> </system.web> <system.serviceModel> <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/> <services> <service name="RestService.socialApi"> <endpoint address="" binding="webHttpBinding" contract="RestService.IsocialApi" bindingConfiguration="webHttpBindingJsonP" behaviorConfiguration="webHttpBehavior"> </endpoint> </service> </services> <behaviors> <serviceBehaviors> <behavior name="ServiceBehaviour"> <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment --> <serviceMetadata httpGetEnabled="true" /> <!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information --> <serviceDebug includeExceptionDetailInFaults="true" /> </behavior> </serviceBehaviors> <endpointBehaviors> <behavior name="webHttpBehavior" > <webHttp /> </behavior> </endpointBehaviors> </behaviors> <bindings> <webHttpBinding> <binding name="webHttpBindingJsonP" crossDomainScriptAccessEnabled="true"/> </webHttpBinding> </bindings> <!--<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />--> </system.serviceModel> <system.webServer> <modules runAllManagedModulesForAllRequests="true" /> </system.webServer> <connectionStrings> <add name="AsrAppEntities" connectionString="myconstring**********" /> </connectionStrings> </configuration> 

And my operationcontract:

using System; using System.Collections.Generic; using System.Linq; using System.Runtime.Serialization; using System.ServiceModel; using System.Text; using System.ServiceModel.Web; using System.IO; namespace socialApi { [ServiceContract] public interface IsocialApi { [OperationContract] [WebGet( ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare, UriTemplate = "/api/login?username={username}&password={password}")] JsonpAuthenticationResponse Login(string username, string password); } } 

The response is just normal json:

{"Message":"unauthorized","Status":400,"Token":null} 

And I want:

callbackfunction({"Message":"unauthorized","Status":400,"Token":null}) 

I think it has something to do with the Web.config, because when I modify the example and adjust the Web.config so it looks like mine the example doesn't function anymore. You would say I pinpointed the problem.. but no.

To supply as much as information as possible, here is the working solution from the example:

Web.config:

<?xml version="1.0"?> <!-- Copyright (c) Microsoft Corporation. All rights reserved. --> <configuration> <system.web> <compilation debug="true" targetFramework="4.0" /> <authentication mode="None" /> </system.web> <system.webServer> <modules runAllManagedModulesForAllRequests="true"/> </system.webServer> <system.serviceModel> <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/> <standardEndpoints> <webScriptEndpoint> <standardEndpoint name="" crossDomainScriptAccessEnabled="true"/> </webScriptEndpoint> </standardEndpoints> </system.serviceModel> </configuration> 

And the class:

//---------------------------------------------------------------- // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------- using System.Runtime.Serialization; using System.ServiceModel; using System.ServiceModel.Activation; using System.ServiceModel.Web; namespace Microsoft.Samples.Jsonp { [DataContract] public class Customer { [DataMember] public string Name; [DataMember] public string Address; } [ServiceContract(Namespace="JsonpAjaxService")] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class CustomerService { [WebGet(ResponseFormat = WebMessageFormat.Json)] public Customer GetCustomer() { return new Customer() { Name="Bob", Address="1 Example Way"}; } } } 

The above example returns a jsonp object. This is the call from the example:

function makeCall() { var proxy = new JsonpAjaxService.CustomerService(); proxy.set_enableJsonp(true); proxy.GetCustomer(onSuccess, onFail, null); } 

proxy.set_enableJsonp(true); is maybe something I am missing in my call? But I can't add this in my call because I'm not calling the service from the same solution.

So any idea's about what's causing the normal JSON response instead of the request JSONP?