首先尝试通过NuGet的StructureMap和MVC3 [英] First try StructureMap and MVC3 via NuGet

问题描述

我正在试图设计如何为ASP.NET MVC3配置StructureMap我已经使用了NuGet，我注意到它创建了一个名为StructuremapMVC的cs文件的App_Start文件夹，所以我检查并注意到相同代码但是简化，将手动写在放置在Global.asax上的App_Start部分...

这是我从IoC Class

  public static class IoC 
 {
 public static IContainer Initialize（）
 {
 ObjectFactory.Initialize（x => ; 
 {
 x.Scan（scan => 
 {
 scan.TheCallingAssembly（）; 
 scan.WithDefaultConventions（）; 
 scan.AddAllTypesOf< ; IController>（）; 
}）; 
 x.For&OpCio nDB>（）。使用（（）=> new DatabaseFactory（）。Get（））; 
}）; 
 return ObjectFactory.Container; 
} 
} 
  

我的问题是为什么当我注入时会得到异常我的控制器上的一些IoC如下（我使用这种模式：实体框架4 CTP 4 / CTP 5通用存储库模式和单元可测试）：

私人readonly IAsambleaRepository _aRep; 
 private readonly IUnitOfWork _uOw; 
 
 public AsambleaController（IAsambleaRepository aRep，IUnitOfWork uOw）
 {
 _aRep = aRep; 
 this._uOw = uOw; 
} 
 
 public ActionResult List（string period）
 {
 var rs = _aRep.ByPeriodo（period）.ToList< Asamblea>（）; 
 
 return View（）; 
} 
  

异常显示：

 异常详细信息：System.MissingMethodException：为此对象定义的无参数构造函数。 
  

解决方案

您收到该错误，因为您尚未设置StructureMap来解析依赖关系需要构建 AsambleaController ，所以它试图找到一个没有参数的构造函数，没有一个。

所以你需要做的是为 IAsambleaRepository 和 IUnitOfWork 设置StructureMap。

在旁注中，我会说 IUnitOfWork 应该是依赖于你的存储库，而不是你的控制器...你的控制器应该'需要了解工作单位。

I'm trying to figure how to config StructureMap for ASP.NET MVC3 I've already using NuGet and I notice that it creates App_Start Folder with a cs file named as StructuremapMVC, so I check it and notice that is the same code but simplified that will be written manually on App_Start section placed on Global.asax...

This is my code from IoC Class

public static class IoC
    {
        public static IContainer Initialize()
        {
            ObjectFactory.Initialize(x =>
                        {
                            x.Scan(scan =>
                                    {
                                        scan.TheCallingAssembly();
                                        scan.WithDefaultConventions();
                                        scan.AddAllTypesOf<IController>();
                                    });
                            x.For<OpcionDB>().Use(() => new DatabaseFactory().Get());
                        });
            return ObjectFactory.Container;
        }
    }

My Question is Why I get an Exception when I inject some IoC on my Controllers as the follow (I use this pattern : Entity Framework 4 CTP 4 / CTP 5 Generic Repository Pattern and Unit Testable) :

        private readonly IAsambleaRepository _aRep;
        private readonly IUnitOfWork _uOw;

        public AsambleaController(IAsambleaRepository aRep, IUnitOfWork uOw)
        {
            _aRep = aRep;
            this._uOw = uOw;
        }

        public ActionResult List(string period)
        {
            var rs = _aRep.ByPeriodo(period).ToList<Asamblea>();

            return View();
        }

Exception showed :

Exception Details: System.MissingMethodException: No parameterless constructor defined for this object.

解决方案

You are getting that error because you haven't setup StructureMap to resolve the dependencies needed to contruct the AsambleaController so it tries to find a parameterless constructor which there isn't one.

So what you need to do is setup StructureMap for IAsambleaRepository and IUnitOfWork.

On a side note, I'd say that IUnitOfWork should be a dependency on your repository and not your controller... your controller shouldn't need to know about the unit of work.

这篇关于首先尝试通过NuGet的StructureMap和MVC3的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！