WCF Data Service - Request error

wcf-data-services

Solution

If you set the `[ServiceBehavior(IncludeExceptionDetailInFaults=true)]` attribute on the service and set `config.UseVerboseErrors` to `true`, you will get a much clearer error message on the client side. Please be sure to remove these settings before you go to production as they could result in unintentional information disclosure:

[ServiceBehavior(IncludeExceptionDetailInFaults = true)]
public class FileService : DataService<FileContext>
{
    public static void InitializeService(DataServiceConfiguration config)
    {
        config.UseVerboseErrors = true;
        config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);
        config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V3;
    }
}

Problem

I am doing a simple WCF Data service on top of LINQ to SQL data context. My svc.cs file is very simple. However, when I run it from VS2012, I get a generic "Request Error" with no more information. How can I troubleshoot/resolve it? ``` using System; using System.Collections.Generic; using System.Data.Services; using System.Data.Services.Common; using System.Linq; using System.ServiceModel.Web; using System.Web; using MyApp.Business.Pmw.DataAccess; namespace MyApp.DataService { public class SystemData : DataService<PmwModelDataContext> { // This method is called only once to initialize service-wide policies. public static void InitializeService(DataServiceConfiguration config) { config.SetEntitySetAccessRule("SysParam", EntitySetRights.ReadMultiple); // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc. // Examples: // config.SetEntitySetAccessRule("MyEntityset", EntitySetRights.AllRead); // config.SetServiceOperationAccessRule("MyServiceOperation", ServiceOperationRights.All); config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V3; } } } ```

Original source