CODEWITHSUNDEEP
asp.net-mvc-3entity-framework
Beginner
Beginner

Reputation: 29533

MVC3 Value cannot be null. Parameter name: value

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

Upvotes: 30

Views: 40956

Answers (5)

Aaron
Aaron

Reputation: 31

I was getting this same error message when manually setting a @Html.TextArea, I had used the code from an @Html.TextBox(null, this.Model) in an EditorTemplate and when I did @Html.TextArea(null, this.Model) I got the error above.

Turns out you have to do @Html.TextArea("", this.Model) and it works.

Upvotes: 1

Arkadas Kilic
Arkadas Kilic

Reputation: 2484

If you use [Display(Name="")] as for properties of your model, This will cause the error you get. To solve this problem, you should avoid using empty display name attribute.

[Display(Name = "")] //this line is the cause of error
public string PromotionCode { get; set; }

Upvotes: 14

Aleksandr Belevtsov
Aleksandr Belevtsov

Reputation: 296

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

Upvotes: 20

Huske
Huske

Reputation: 9296

It could most probably be that your model has a property that returns a non-nullable value, like int, DateTime, double etc. And if user is updating the entry you are probably not storing that value in a hidden field or somewhere, so when the data is returned that particular property is null. Either place that property into a hidden field or make your property nullable in a model by changing int to int?, etc.

Upvotes: 4

Daryl Teo
Daryl Teo

Reputation: 5495

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)

Upvotes: 27

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