MVC3 Value cannot be null. Parameter name: value

Question

I am trying to load data of a user edit it and then save it. this has been working and im not quite sure what i changed but now i am getting the following error...

Value cannot be null. Parameter name: value  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.   Exception Details: System.ArgumentNullException: Value cannot be null. Parameter name: value  Source Error:   An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  Stack Trace:    [ArgumentNullException: Value cannot be null. Parameter name: value]    System.ComponentModel.DataAnnotations.ValidationContext.set_DisplayName(String value) +51903    System.Web.Mvc.<Validate>d__1.MoveNext() +135    System.Web.Mvc.<Validate>d__5.MoveNext() +318    System.Web.Mvc.DefaultModelBinder.OnModelUpdated(ControllerContext controllerContext, ModelBindingContext bindingContext) +139    System.Web.Mvc.DefaultModelBinder.BindComplexElementalModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Object model) +66    System.Web.Mvc.DefaultModelBinder.BindComplexModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +1367    System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +449    System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor) +317    System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor) +117    System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343    System.Web.Mvc.Controller.ExecuteCore() +116    System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97    System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10    System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37    System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21    System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62    System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50    System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7    System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22    System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60    System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9    System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8897857    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184        public ActionResult EditDetails()     {         int id = Convert.ToInt32(Session["user"]);         S1_Customers u1_users = storeDB.S1_Customers.Find(id);         return View(u1_users);     }      [HttpPost]     public ActionResult EditDetails(S1_Customers u1_users)     {         var Pcode = "";           if (ModelState.IsValid)         { 

I am not even reaching ModelState.IsValid when i click submit

Answer 1

Did you change any names? The form names have to map 1-1 with your Action parameters. In this case, the "name" parameter was not passed to the controller action, so it is null.

Wild guess, need more information (method signature of action)

Answer 2

You'll receive that error if you have some properties decorated by DisplayAttribute with empty Name ([DisplayAttribute(Name = "", Description = "Any description")])