如何在服务响应中显示WCF HTTP代码

Question

我正在使用WCF和实体框架处理一个web服务，我想知道如何查看HTTP状态代码或将其返回给调用客户端。

我拥有的代码如下：

   [OperationContract]
        [WebInvoke(Method = "GET", ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest, UriTemplate = "/GetUsers")]
        List<User> GetUsers();

  public List<User> GetUsers()
        {
            var userController = new UserController();
            return userController.GetUsers();
        }

 public List<User> GetUsers()
        {
            List<User> serverResponse = new List<User>();

            try
            {
                using (var db = new MyEntities())
                {
                  List<user> userList = db.users.ToList();

                    foreach (user userRecord in userList)
                    {
                        User userDto = new User();
                        userDto.userId = userRecord.user_id;
                        userDto.name = userRecord.user_name;
                        serverResponse.Add(userDto);
                    }
                }
            }

            catch (Exception ex)
            {

            }

            return serverResponse;

  [DataContract]
    public class User
    {
        [DataMember(Name = "name")]
        public string name { get; set; }

        [DataMember(Name = "userId")]
        public int userId { get; set; }

    }

 [
    {
        "name": "APIClientTestUser",
        "userId": 212,
    }
]

无论是使用这个JSON还是在其他地方，我都希望客户机知道调用是否通过适当的HTTP代码成功或失败。任何关于如何做到这一点的提示或建议都将不胜感激。

Answer 1

最简单的方法可能是将结果包装成一般的响应对象

[DataContract]
public class Response<T>
{
    [DataMember]
    public T Result { get; set; }

    [DataMember]
    public int Status { get; set; }
}

// then your declaration
Response<List<User>> serverResponse = Response<List<User>>();

// on success
serverResponse.Result = userList;
serverResponse.Status = 200; // ok

// on fail
serverResponse.Status = 500; // fail

// and contract
[OperationContract]
[WebInvoke(Method = "GET", ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest, UriTemplate = "/GetUsers")]
Response<List<User>> GetUsers();