Question

我正在尝试将我的控制器转换为使用DI。

基于article here，我现在得到了这段代码：

namespace HandheldServer.Controllers
{
    public class DuckbillsController : ApiController
    {
        static IDuckbillRepository _platypiRepository;

        public DuckbillsController(IDuckbillRepository platypiRepository)
        {
            if (platypiRepository == null)
            {
                throw new ArgumentNullException("platypiRepository is null");
            }
            _platypiRepository = platypiRepository;
        }

        public int GetCountOfDuckbillRecords()
        {
            return _platypiRepository.Get();
        }

        public IEnumerable<Duckbill> GetBatchOfDuckbillsByStartingID(int ID, int CountToFetch)
        {
            return _platypiRepository.Get(ID, CountToFetch);
        }

        public void PostDuckbill(int accountid, string name)
        {
            _platypiRepository.PostDuckbill(accountid, name);
        }

        public HttpResponseMessage Post(Duckbill Duckbill)
        {
            Duckbill = _platypiRepository.Add(Duckbill);
            var response = Request.CreateResponse<Duckbill>(HttpStatusCode.Created, Duckbill);
            string uri = Url.Route(null, new { id = Duckbill.Id });
            response.Headers.Location = new Uri(Request.RequestUri, uri);
            return response;
        }
    }
}

...但它没有编译;我得到了，“不一致的可访问性：参数类型'HandheldServer.Models.IDuckbillRepository'不如方法'HandheldServer.Controllers.DuckbillsController.DuckbillsController（HandheldServer.Models.IDuckbillRepository）'”

错误消息中提到的接口参数类型是：

using System.Collections.Generic;

namespace HandheldServer.Models
{
    interface IDuckbillRepository
    {
        int Get();
        IEnumerable<Duckbill> Get(int ID, int CountToFetch);
        Duckbill Add(Duckbill item);
        void Post(Duckbill dept);
        void PostDuckbill(int accountid, string name);
        void Put(Duckbill dept);
        void Delete(int Id);
    }
}

我需要做些什么来解决这个错误信息？

Answer 1

您需要明确将interface标记为public：

public interface IDuckbillRepository
{
    // ....
}

另外，请勿在控制器中标记static。

我必须做些什么才能使我的界面至少与引用它的方法一样易于访问？

1 个答案: