System.MissingMethodException: No parameterless constructor defined for this object

Question

I\'m using MVC 2.0 with a Html.ListBoxFor as below:

<% using (Html.BeginForm()) { %>

       \" />

        <%=         


        

Answer 1

Does your LogOnModel have a parameterless constructor? It needs one for the DefaultModelBinder to instantiate it. Additionally, when you post the exception, please post the full stack trace from the exception object, else we're simply guessing where the error actually took place.

Answer 2

This error is coming from the ControllerFactory not the View. It is stating that you don't have a paramerless constructor in your Controller. The DefaultControllerFactory for ASP.NET MVC can only instantiate a Controller with a public parameter less constructor. If you plugin your own ControllerFactory and use some DI/IoC tool you can bypass this limitation.