WCF数据服务 - 请求错误

Question

我正在LINQ to SQL数据上下文上做一个简单的WCF数据服务。 我的svc.cs文件非常简单。但是，当我从VS2012运行它时，我得到一个通用的“请求错误”，没有更多信息。我如何解决/解决它？

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; 
     } 
    } 
} 

Answer 1

如果设置的服务[ServiceBehavior(IncludeExceptionDetailInFaults=true)]属性和设置config.UseVerboseErrors到true，您将获得在客户端更清晰的错误消息。请务必在投入生产之前删除这些设置，因为这些设置可能会导致无意的信息泄露：

[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; 
    } 
}