Question

我正在尝试为Cookie实现一个包装器，如下所示：

http://chwe.at/blog/post/2009/01/28/Testable-and-reusable-cookie-access-with-ASPNet-MVC-RC.aspx

但是StructureMap失败并出现错误：

StructureMap Exception Code:  202
No Default Instance defined for PluginFamily System.Web.HttpRequestBase,
System.Web.Abstractions, Version=3.5.0.0, Culture=neutral,     
PublicKeyToken=31bf3856ad364e35

我认为这是因为我试图让StructureMap为以下方法提供参数：

    public CookieContainer(HttpRequestBase request, HttpResponseBase response)
    {
        Check.IsNotNull(request, "request");
        Check.IsNotNull(response, "response");

        _request = request;
        _response = response;
    }

我尝试将以下内容添加到StructureMap注册表中：

        ForRequestedType<HttpRequestBase>()
            .TheDefaultIsConcreteType<HttpRequestBase>();

        ForRequestedType<HttpResponseBase>()
            .TheDefaultIsConcreteType<HttpResponseBase>();

但是失败并出现错误：

StructureMap Exception Code:  180
StructureMap cannot construct objects of Class System.Web.HttpRequestBase, 
System.Web.Abstractions, Version=3.5.0.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35 because there is no public constructor found.

如何让StructureMap向方法提供HttpRequestBase和HttpResponseBase个对象？

Answer 1

这是因为HttpRequestBase是抽象的，而SM对此无能为力。

使用出厂的Methode

ForRequestedType<HttpRequestBase>().TheDefault.Is
  .ConstructedBy(() => HttpContext.Request);

Answer 2

事实证明我不需要重载的构造函数..所以我所要做的就是删除它：

public CookieContainer(HttpRequestBase request, HttpResponseBase response)
{
    Check.IsNotNull(request, "request");
    Check.IsNotNull(response, "response");

    _request = request;
    _response = response;
}

此构造函数仅用于创建模拟cookie容器，您可以在其中传递模拟HttpRequestBase和HttpResponseBase对象。

StructureMap：如何向方法提供System.Web.HttpRequestBase？

2 个答案: