C# - 设计问题建议:那么不能使用字典么？

Question

我需要通过Web服务返回一个Dictionary(或一些List,我只是不知道),特别是通过WCF数据服务.看起来WCF数据服务不支持字典类型.

通过Web服务看起来像这样:

<?xml version="1.0" encoding="utf-8" standalone="yes" ?> 
- <Employees xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices">
    <element>employee1, True</element> 
    <element>employee2, False</element>
    <element>employee3, True</element>
  </Employees>

我首先尝试了一个1维数组,这似乎工作,但当然只带来3个elemet数字的1维数组:

[WebGet]
public string[] Employees()
{
   return new[]
   {
        "employee1",
        "employee2",
        "employee3"
   };
}

基本上,我需要一些List(？),每个都有两个参数,即EmployeeName和一个booleann值,IsActive.

任何建议将不胜感激.

更新:我在Web服务中添加了以下内容:

public class Employee
    {
        public string Name{ get; set; }
        public bool IsActive{ get; set; }

        public Employee(string name, bool isActive)
        {
            Name = name;
            IsActive = isActive;
        }
    }

[WebGet]
        public List<Employee> Employees()
        {
            var emp1 = new Employee("Test1", true);
            var emp2 = new Employee("Test2", true);
            var list = new List<Employee> { emp1, emp2 };
            return list;
        }

当像我的网络浏览器中的.svc文件一样,我在加载时得到这个:

Request Error

The server encountered an error processing the request. The exception message is 'Unable to load metadata for return type 'System.Collections.Generic.List`1[Web.Employee]' of method 'System.Collections.Generic.List`1[.Web.Employee] Employees()'.'. See server logs for more details. The exception stack trace is: 

at System.Data.Services.Providers.BaseServiceProvider.AddServiceOperation(MethodInfo method, String protocolMethod) at System.Data.Services.Providers.BaseServiceProvider.AddOperationsFromType(Type type) at System.Data.Services.DataService`1.CreateProvider() at System.Data.Services.DataService`1.HandleRequest() at System.Data.Services.DataService`1.ProcessRequestForMessage(Stream messageBody) at SyncInvokeProcessRequestForMessage(Object , Object[] , Object[] ) at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs) at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage41(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage11(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc& rpc) at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)

有任何想法吗？

更新2:

以下是有关DataService.svc类的更多信息.我在.NET 4.0框架中使用WCF数据服务的V2:

public class WebDataService : DataService<MyModelEntities>
    {
        public static void InitializeService(DataServiceConfiguration config)
        {
            config.UseVerboseErrors = true;
            config.SetServiceOperationAccessRule("*", ServiceOperationRights.All);
            config.SetEntitySetAccessRule("*", EntitySetRights.AllRead | EntitySetRights.AllWrite);
            config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;
        }

Answer 1

为什么不创建一个用户定义的数据类型,其中包含两个属性:字符串和布尔值？

public class MySillyWCFObject
{ 
 boolean b;
 string name;

 public MySillyWCFObject(boolean b, string s)
  {
   this.b = b;
   this.name = s;
  }
}

然后你可以说:

MySillyWCFObject m = new MySillyWCFObject(true, "Hi");