與use.something不同

Question

我現在正在創建MVC 5.0 C＃中的web應用程序，我的作品停止了，因爲我有一點問題。我有Packs類，接口Packs - IPacksrepository和PacksController。

Packs.cs

namespace Domain.Entities 
{ 
public class Packs 
{ 
    public int PacksID { get; set; } 
    public string Name { get; set; } 
    public string OwnerDescripiton { get; set; } 
    public decimal wymiarX { get; set; } 
    public decimal wymiarY { get; set; } 
    public decimal wymiarZ { get; set; } 
    public decimal Waga { get; set; } 
    public string dataprzyjeciadomagazynu { get; set; } 
    public string datawyslaniazmagazynu { get; set; } 
    public string dataodebrania { get; set; } 
    public int WarehousesID { get; set; } 
    [ForeignKey("WarehousesID")] 
    public Warehouses Warehouses { get; set; } 

} 
} 

IPackRepostiory：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using Domain.Entities; 


namespace Domain.Abstract 
{ 
public interface IPacksRepository 
{ 
    IEnumerable<Packs> Packss { get; } 

    void SavePacks(Packs packs); 

    Packs DeletePacks(int PacksID); 
} 
} 

PackController：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.Mvc; 
using Domain.Entities; 
using Domain.Abstract; 
using WebUi.Models; 

namespace WebUi.Controllers 
{ 
public class PacksController : Controller 
{ 
    private IPacksRepository repository; 
    public int PageSize = 1; 
    public PacksController(IPacksRepository packrepostiory) 
    { 
     this.repository = packrepostiory; 
    } 

    public ViewResult List() 
    { 
     return View(repository.Packss); 
    } 
    public ViewResult Index() 
    { 
     return View(repository.Packss); 
    } 

    public ViewResult Create() 
    { 
     return View("Edit", new Packs()); 
    } 
    public ActionResult Details(int? PacksID) 
    { 
     Packs packs = repository.Packss.FirstOrDefault(p => p.PacksID == PacksID); 
     return View(packs); 
    } 



    public ViewResult Edit(int? PacksID) 
    { 
     Packs packss = repository.Packss.FirstOrDefault(p => p.PacksID == PacksID); 
     return View(packss); 

    } 

    [HttpPost] 
    public ActionResult Edit(Packs packs) 
    { 
     if (ModelState.IsValid) 
     { 
      repository.SavePacks(packs); 
      TempData["message"] = string.Format("Zapisano {0} ", packs.Name); 
      return RedirectToAction("Index"); 
     } 
     else 
     { 
      return View(packs); 
     } 


    } 
    public ActionResult Delete(int PacksID) 
    { 
     Packs delpacks = repository.DeletePacks(PacksID); 
     if (delpacks != null) 
     { 
      TempData["message"] = string.Format("Usunięto {0}", delpacks.Name); 
     } 
     return RedirectToAction("Index"); 
    } 
} 
} 

在我的項目，我有幾個類，interfaces和Controllers（如persons，warehouses， transportfleet） - 所有功能在結構上相似，只有數據集不同。

所有我「名字」存儲庫使用using Domain.Entities和一切都OK，所有工作。 Domain.Entities包含Pack.cs等。 IPacksRepostiory即使它包含未使用的名稱using Domain.Entities。通過我在PackController得到錯誤狀PackController：

public ViewResult Edit(int? PacksID) 
{ 
    Packs packss = repository.Packss.FirstOrDefault(p => p.PacksID == PacksID); 
    return View(packss); 
} 

repository.Packss.FirstOrDefault（p值=> p.PacksID == PacksID）; - > 錯誤CS1503參數1：不能從轉換 'Domain.Entities.Packs' 爲 'Domain.Packs'

Answer 1

您既可以使用var關鍵字來代替：

var packss = repository.Packss.FirstOrDefault(p => p.PacksID == PacksID); 

或指定限定符和全類型名稱隱含歧義的類名稱區分：

Domain.Entities.Packs packss = repository.Packss.FirstOrDefault(p => p.PacksID == PacksID);