JsonParamFilter

[Laurent Fabre]

Hi,

I've been using this trick for the RadComboBox with MVC 1.0 : http://blogs.telerik.com/atanaskorchev/posts/09-04-01/asp_net_mvc_-_passing_json_to_controller_actions_and_populating_controls_on_demand.aspx

Somehow it kept working under MVC 2.0 with framework 3.5 but now it keeps throwing "Ambiguous match found." ever since I moved the application to framework 4.0. Any hint ? :)

I would say that there's more than one "ConvertToType" method...I'll keep looking if I can fix it.

[AmbiguousMatchException: Ambiguous match found.]
	System.RuntimeType.GetMethodImpl(String name, BindingFlags bindingAttr, Binder binder, CallingConventions callConv, Type[] types, ParameterModifier[] modifiers) +9607924
	System.Type.GetMethod(String name) +29
	Filters.JsonParamFilterAttribute.OnActionExecuting(ActionExecutingContext filterContext) in C:\Users\Laurent\Documents\Visual Studio 2010\Projects\konnect\Kirranet.Repository.Common\Attributes\JsonParamFilterAttribute.cs:34
	System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +81
	System.Web.Mvc.<>c__DisplayClassf.<InvokeActionMethodWithFilters>b__c() +61
	System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +436
	System.Web.Mvc.<>c__DisplayClassf.<InvokeActionMethodWithFilters>b__c() +61
	System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +436
	System.Web.Mvc.<>c__DisplayClassf.<InvokeActionMethodWithFilters>b__c() +61
	System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +305
	System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +830
	System.Web.Mvc.Controller.ExecuteCore() +136
	System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +111
	System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +39
	System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__4() +65
	System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +44
	System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +42
	System.Web.Mvc.Async.WrappedAsyncResult`1.End() +140
	System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +54
	System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +40
	System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +52
	System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +38
	System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8836913
	System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184