没有为此对象定义的无参数构造函数 [英] No parameterless constructor defined for this object

问题描述

我正在开发visual studio 2013并安装了ninject.mvc5以及

我这样映射了

Hi,
I am working on visual studio 2013 and installed ninject.mvc5 and also
I have mapped like this

private static void RegisterServices(IKernel kernel)
       {
           kernel.Bind<ITrainService>().To<TrainService>();
       }

但我仍然收到错误'没有为此对象定义无参数构造函数。

我还修改了web.config，如

But I am still getting error 'No parameterless constructor defined for this object.
I have also modified web.config like

<dependentAssembly>
       <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
       <bindingRedirect oldVersion="1.0.0.0" newVersion="5.2.2.0" />

       <bindingRedirect oldVersion="2.0.0.0" newVersion="5.2.2.0" />

       <bindingRedirect oldVersion="3.0.0.0" newVersion="5.2.2.0" />
       <bindingRedirect oldVersion="0.0.0.0-5.2.2.0" newVersion="5.2.2.0" />


     </dependentAssembly>

但仍然没有运气

任何帮助??

But still no luck
Any help ??

推荐答案

无参数构造函数是很明显的原因是许多技术所需要的。当然，有一个默认的构造函数，但是，如果你定义了一些其他的构造函数，它只有在你明确定义它时才可用。而已。明确定义无参数构造函数。

-SA

A parameterless constructor is required in a number of technologies, by a pretty apparent reason. Of course, there is a default constructor, but, if you define some other constructor(s), it will become available only if you explicitly define it. That's it. Define a parameterless constructor explicitly.

—SA

此问题已解决。实际上我在另一个项目中创造了区域。所以我在父项目中配置Ninject而不是在子项目中进行。

This problem is solved . Actually I had made area in another project. so I configured Ninject in parent project instead of doing it in child project.

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