retour * nu * JSON de service WCF Web

Question

J'ai un service Web WCF qui renvoie des données JSON retour à une application (. Et non une application Web ASP.NET) Voici le code:

[ServiceContract(Namespace = "Navtrak.Services.WCF.MobileAPI")] 
    public interface IJobServiceJSON 
    { 
     [OperationContract] 
     [ServiceKnownType(typeof(Job))] 
     [WebInvoke(
      Method = "GET", 
      BodyStyle = WebMessageBodyStyle.WrappedRequest, 
      ResponseFormat = WebMessageFormat.Json)] 
     PagedResult<Job> ReadJobs(int userId, int? startIndex, int? maxResults, string searchTerm, string sortBy); 
    } 

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] 
    public class JobServiceJSON : IJobServiceJSON 
    { 
     public PagedResult<Job> ReadJobs(int userId, int? startIndex, int? maxResults, string searchTerm, string sortBy) 
     { 
      var service = new JobService(); 
      return service.ReadJobs(userId, startIndex, maxResults, searchTerm, sortBy); 
     } 
    } 

<%@ ServiceHost Language="C#" Debug="true" Service="Navtrak.Services.WCF.MobileAPI.JobServiceJSON" CodeBehind="JobServiceJSON.svc.cs" Factory="System.ServiceModel.Activation.WebScriptServiceHostFactory" %> 

Et ici est les paramètres web.config:

<services> 
     <service name="JobServiceJSON" behaviorConfiguration="HttpGetMetadata"> 
     <endpoint contract="Navtrak.Services.WCF.MobileAPI.Interfaces.IJobServiceJSON" binding="basicHttpBinding" behaviorConfiguration="AjaxBehavior" /> 
     </service> 
    </services> 

    <behaviors> 
     <serviceBehaviors> 
     <behavior name="HttpGetMetadata"> 
      <serviceMetadata httpGetEnabled="true"/> 
      <serviceDebug includeExceptionDetailInFaults="true"/> 
     </behavior> 
     </serviceBehaviors> 
     <endpointBehaviors> 
     <behavior name="AjaxBehavior"> 
      <!--<enableWebScript />--> 
      <webHttp defaultOutgoingResponseFormat="Json"/> 
     </behavior> 
     </endpointBehaviors> 
    </behaviors> 
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" /> 
    </system.serviceModel> 

le problème avec cette approche est qu'elle retourne le JSON enveloppé dans un objet « d », ce qui est pas terrible, mais il renvoie également une propriété « ___type » pour chaque objet avec l'espace de noms de la classe. Ce gonflerait vraiment la taille du JSON, comme on le voit ici:

{"d":{"__type":"PagedResultOfJobPUkCTgiD:#Navtrak.Business.Schemas.CommonSchemas.Schemas","Results":[{"__type":"Job:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Address":"1011 Granite Ct, Salisbury, MD 21804-8609,","Contact":null,"CreateDate":"\/Date(1313514808000-0400)\/","DstActive":0,"Id":18416,"JobAttributes":[{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":1,"Name":"","Sequence":0,"Value":"1011 Granite Ct, Salisbury, MD 21804-8609"},{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":1,"Name":"","Sequence":1,"Value":"1011 Granite Ct, Salisbury, MD 21804-8609,"},{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":0,"Name":"","Sequence":4,"Value":"2:00p ET"},{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":1,"Name":"","Sequence":5,"Value":"test job!"}],"JobTextForMobileDisplay":null,"Latitude":38352974,"Longitude":-75563528,"Name":"1011 Granite Ct, Salisbury, MD 21804-8609","Notes":"test job!","Phone":null,"PromisedDate":"\/Date(1313604000000-0400)\/","ScheduledDay":"\/Date(1313553600000-0400)\/","ScheduledTimeFrom":0,"ScheduledTimeTo":0,"Status":10,"TimeZoneOffset":0},{"__type":"Job:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Address":", , ,","Contact":null,"CreateDate":"\/Date(1313515111000-0400)\/","DstActive":0,"Id":18419,"JobAttributes":[{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":1,"Name":"","Sequence":1,"Value":", , ,"},{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":1,"Name":"","Sequence":0,"Value":"1 test place jul 13"},{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":0,"Name":"","Sequence":4,"Value":"2:00p ET"},{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":1,"Name":"","Sequence":5,"Value":"test"}],"JobTextForMobileDisplay":null,"Latitude":38774850,"Longitude":-96554630,"Name":"1 test place jul 13","Notes":"test","Phone":null,"PromisedDate":"\/Date(1313604000000-0400)\/","ScheduledDay":"\/Date(1313553600000-0400)\/","ScheduledTimeFrom":0,"ScheduledTimeTo":0,"Status":10,"TimeZoneOffset":0},{"__type":"Job:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Address":"1011 Granite Ct, Salisbury, MD 21804-8609,","Contact":null,"CreateDate":"\/Date(1313515357000-0400)\/","DstActive":0,"Id":18420,"JobAttributes":[{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":1,"Name":"","Sequence":0,"Value":"1011 Granite Ct, Salisbury, MD 21804-8609"},{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":1,"Name":"","Sequence":1,"Value":"1011 Granite Ct, Salisbury, MD 21804-8609,"},{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":0,"Name":"","Sequence":4,"Value":"2:00p ET"},{"__type":"JobAttribute:#Navtrak.Business.Schemas.CommonSchemas.Schemas.Job","Id":0,"JobAttributeId":0,"JobId":0,"MobileDisplay":1,"Name":"","Sequence":5,"Value":"test"}],"JobTextForMobileDisplay":null,"Latitude":38352974,"Longitude":-75563528,"Name":"1011 Granite Ct, Salisbury, MD 21804-8609","Notes":"test","Phone":null,"PromisedDate":"\/Date(1313604000000-0400)\/","ScheduledDay":"\/Date(1313553600000-0400)\/","ScheduledTimeFrom":0,"ScheduledTimeTo":0,"Status":10,"TimeZoneOffset":0}],"TotalRecords":4}} 

J'ai essayé de revenir BARE JSON, mais ne l'ont pas été en mesure de comprendre. Si je change le BodyStyle en WebMessageBodyStyle.Bare alors il me donne une erreur que n'importe quel type excepté WrappedRequest est incompatible avec le comportement de manuscrit de Web. Si je supprime Factory = "System.ServiceModel.Activation.WebScriptServiceHostFactory" du fichier svc, si j'essaie d'appeler le service/méthode json à partir d'un navigateur Web, il renvoie une erreur de 400 requêtes incorrectes. Une autre note de site liée à cela, je pensais que définir "enableWebScript" dans la section AjaxBehavior ferait la même chose que le paramètre Factory = dans le fichier svc, mais il ne fait rien. Je dois placer le Factory = afin qu'il renvoie correctement le JSON et ne pas donner l'erreur 400.

Alors, des suggestions sur comment je peux obtenir ce travail? Ce service JSON est appelé par les applications mobiles, donc je ne veux vraiment pas retourner tous les attributs "___type".

Answer 1

Si vous utilisez le WebScriptServiceHostFactory, vous n'avez pas besoin d'utiliser config (et puisque l'attribut "name" dans l'élément <service> n'a pas d'espace de noms, je pense qu'il est ignoré quand même). WebScriptServiceHostFactory est conçu pour être utilisé avec le framework ASP.NET AJAX et non pour une utilisation générale. Si vous le remplacez par WebServiceHostFactory, vous devriez voir à la fois l'emballage {"d": et les astuces __type pour les objets.