Unity配置错误-类型没有带参数的构造函数

Unity configuration error - type does not have constructor that takes parameters

背景:我有一个助手 class,我用它来设置 ExceptionManager 的策略。在这个 class 中,我想注入 IExceptionHandler 接口的各种实现,我想通过配置文件来控制它。

事情是这样的: 助手class和界面:

public class ErrorHelper: IErrorHelper
{
    private static IExceptionHandler _exceptionHandler;
    public ErrorHelper(IExceptionHandler exceptionHandler)
    {
        _exceptionHandler = exceptionHandler;
    }

    public IList<ExeptionPolicyDefinition> GetPolicies()
    {
        //Do stuff here and return policies
        //This is the place where _exceptionHandler is used
    }
}
public interface IErrorHelper
{
    IList<ExeptionPolicyDefinition> GetPolicies();
}

IExceptionHandler 实现:

public class MyExceptionHandler: IExceptionHandler
{
    public MyExceptionHandler()
    {
        //Do some stuff here
    }
    public Exception HandleException(Exception exp, Guid iId)
    {
        //Handle exception and log
    }
}

统一bootstrapclass:

public class UnityBootstrap
{
    private static IUnityContainer _unityContainer;
    public static void RegisterTypes(IUnityContainer container)
    {
        _unityContainer = container;
        var section = (UnityConfigurationSection)ConfigurationManager.GetSection("unity");
        section.Configure(_unityContainer);
    }
    public static void SetPolicies()
    {
        var helper = _unityContainer.Resolve<IErrorHelper>();
        //Set ExceptionManager and ExceptionPolicy
    }
}

Unity配置文件

<?xml version="1.0" encoding="utf-8"?>
<unity xmlns="http://schemas/microsoft.com/practices/2010/unity">
    <alias alias="IExceptionHandler" type="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.IExceptionHandler, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling, Version=6.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
    <alias alias="MyExceptionHandler" type="TEST.Shared.MyExceptionHandler, Test.Shared"/>
    <alias alias="ErrorHelper" type="TEST.Helpers.Errorhelper, TEST.Helpers"/>
    <alias alias="IErrorHelper" type="TEST.Helpers.IErrorhelper, TEST.Helpers"/>
    <container>
        <register type="IExceptionHandler" mapTo="MyExceptionHandler"/>
        <register type="IErrorHelper" mapTo="ErrorHelper">
             <constructor>
                 <param name="exceptionHandler" type="MyExceptionHandler">
                     <dependency type="MyExceptionHandler"/>
                 </param>
             </constructor>
        </register>
    </container>
</unity>

所以,经过大量的编写和格式化,这是对我所拥有内容的简化。问题是,当我调用 RegisterTypes 时,我在标题中得到错误,指出 ErrorHelper 没有构造函数接受名称 exceptionHandler 的参数,而构造函数中的参数名称很明显是 exceptionHandler.

如果有人能指出我哪里出了问题,请指出。

PS1: 很抱歉问题很长

PS2:我是 DI 和 Unity 的新手

构造函数中的参数类型是IExceptionHandler,不是MyExceptionHandler。

尝试:<param name="exceptionHandler" type="IExceptionHandler">