ASP.NET-MVC项目中的ADO.NET数据服务

你把调试属性放在服务类中了吗?

**[System.ServiceModel.ServiceBehavior(IncludeExceptionDetailInFaults = true)]**  
public class MyDataService : DataService<...>
{
    // This method is called only once to initialize service-wide policies.
    public static void InitializeService(IDataServiceConfiguration config)
    {
        // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc.
        // Examples:
        config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);
        config.SetServiceOperationAccessRule("*", ServiceOperationRights.All);


        **config.UseVerboseErrors = true;**
    }