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我No parameterles constructor defined for this object的HomeController.cs. 根据ASP.NET MVC: No parameterless constructor defined for this object我必须确保我ActionResults没有参数。但是我的 HomeController ActionResult 没有参数：

public class HomeController : Controller
{
    /// <summary>
    /// injected settings
    /// </summary>
    private ISettings settings;

    /// <summary>
    /// Initializes a new instance of the <see cref="HomeController"/> class.
    /// </summary>
    /// <param name="settings">The settings.</param>
    public HomeController(ISettings settings)
    {
        this.settings = settings;
    }

    /// <summary>
    /// Default index page
    /// </summary>
    /// <returns>redirects to the default application home page</returns>
    public ActionResult Index()
    {
        return RedirectToAction("Index", "Home", new { area = settings.Application, master = "default" });
    }
}

我怎样才能找出错误来自哪里？

完整的堆栈跟踪：

[MissingMethodException: No parameterless constructor defined for this object.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache) +98
   System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache) +241
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +69
   System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +67

[InvalidOperationException: An error occurred when trying to create a controller of type 'Web.Lifescience.Controllers.HomeController'. Make sure that the controller has a parameterless public constructor.]
   System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +182
   System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType) +80
   System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName) +74
   System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory) +232
   System.Web.Mvc.<>c__DisplayClass6.<BeginProcessRequest>b__2() +49
   System.Web.Mvc.<>c__DisplayClassb`1.<ProcessInApplicationTrust>b__a() +13
   System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Func`1 func) +124
   System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +98
   System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +50
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +16
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8970356
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184
4

1 回答 1

2

您的问题与ActionResult. 您HomeController没有无参数构造函数。
如果您使用带有参数的控制器的构造函数，您应该创建您的自定义控制器工厂或使用依赖注入：根据您的逻辑手动或使用 IoC 容器。

于 2012-06-17T13:15:13.263 回答