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POWhy doesn't my Unity DependencyResolver work on shared hosting but works locally?
 

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  1. POWhy doesn't my Unity DependencyResolver work on shared hosting but works locally?
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    <p>I'm trying to deploy ASP.NET MVC 3 application wich uses Unity as a IoC container. Application works fine on local server, but when deployed it throws an exception: No parameterless constructor defined for this object. And this is thrown for a controller that should get some repository injected by my Unity DependencyResolver.</p> <p>I've installed Unity with NuGet so it should be referenced directly, and I've checked that it gets copied to bin folder.</p> <p><strong>Edit:</strong></p> <p>Here's the stack trace:</p> <pre><code>[MissingMethodException: No parameterless constructor defined for this object.] System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean&amp; canBeCached, RuntimeMethodHandleInternal&amp; ctor, Boolean&amp; 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 'nBlog.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&amp; controller, IControllerFactory&amp; factory) +196 System.Web.Mvc.&lt;&gt;c__DisplayClass6.&lt;BeginProcessRequest&gt;b__2() +49 System.Web.Mvc.&lt;&gt;c__DisplayClassb`1.&lt;ProcessInApplicationTrust&gt;b__a() +13 System.Web.Mvc.SecurityUtil.&lt;GetCallInAppTrustThunk&gt;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() +8841400 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&amp; completedSynchronously) +18 </code></pre> <p>Anyone have an idea what might be the problem?</p> <p><strong>Edit 2:</strong></p> <p>I've solved the problem by adding references to Mvc libraries (System.Web.Mvc, etc.) in GAC instead of direct references.</p> <p>Previously the application was referencing Mvc libraries directly and they were bin deployed to hosting server, because server had .net 4.0 and mvc 2 installed, but since hosting provider installed Mvc 3, I've changed to references to GAC. I guess it was some security issue, but I'm new to this application security in hosted environments and I would really like to know what exactly was the problem? Resource links would also be appreciated.</p>
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    1. COLooks like a configuration issue in web.config. Also show us the stack trace.
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