The ViewData item that has the key 'GenderID' is of type 'System.Int32' but must be of type 'IEnumerable<SelectListItem>'

Question

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The error occurs when i tried to Submit/Post the data... could someone please help i tried every post but they are not helping me. I am new to mvc... any help will be granted here is my code...

C#

public ActionResult Create()
{
   UserProfileCreateViewModel model = new UserProfileCreateViewModel();

   model.Gender = _GenderRepository.GetAll()
                                   .Select(x =>
                                           new SelectListItem
                                           {
                                              Value = x.ID.ToString(),
                                              Text = x.DESCRIPTION
                                           });
   return View(model);
}

[HttpPost]
public ActionResult Create(UserProfileCreateViewModel model)
{
   if (ModelState.IsValid)
   {
      UserProfile user = new UserProfile();
      user.GENDER_ID = model.GenderID;

      _UserProfileRepository.Add(user);
      _UserProfileRepository.Save();

      return RedirectToAction("Index", "Home");
   }
   return View(model);
}

View

HTML

<div class="form-group">
   @Html.LabelFor(model => model.GenderID, new { @class = "control-label col-md-2" })
   <div class="col-md-10">
      @Html.DropDownListFor(model => model.GenderID, Model.Gender, "Select from List", new { @class = "form-control" })
      @Html.ValidationMessageFor(model => model.GenderID, string.Empty, new { @class = "text-danger" })
   </div>
</div>

Model

C#

public class UserProfileCreateViewModel
{
   [Required(ErrorMessage="{0} is required")]
    [Display(Name="Gender")]
    public int GenderID { get; set; }

    public IEnumerable<SelectListItem> Gender { get; set; }
}

Exception

[InvalidOperationException: The ViewData item that has the key 'GenderID' is of type 'System.Int32' but must be of type 'IEnumerable<SelectListItem>'.]
   System.Web.Mvc.Html.SelectExtensions.GetSelectData(HtmlHelper htmlHelper, String name) +457
   System.Web.Mvc.Html.SelectExtensions.SelectInternal(HtmlHelper htmlHelper, ModelMetadata metadata, String optionLabel, String name, IEnumerable`1 selectList, Boolean allowMultiple, IDictionary`2 htmlAttributes) +188
   System.Web.Mvc.Html.SelectExtensions.DropDownListFor(HtmlHelper`1 htmlHelper, Expression`1 expression, IEnumerable`1 selectList, String optionLabel, IDictionary`2 htmlAttributes) +130
   ASP._Page_Views_UserProfile_Create_cshtml.Execute() in f:\User Database\Company.UserDatabase.WebUI\Views\UserProfile\Create.cshtml:71
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +253
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +147
   System.Web.WebPages.StartPage.ExecutePageHierarchy() +89
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +107
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +375
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +90
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +833
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +81
   System.Web.Mvc.Async.<>c__DisplayClass1e.<BeginInvokeAction>b__1b(IAsyncResult asyncResult) +186
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
   System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +29
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +67
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +53
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +36
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
   System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__4(IAsyncResult asyncResult, ProcessRequestState innerState) +44
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +67
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +399
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronou

Posted 15-Dec-15 3:57am

Member 10740412

Updated 15-Dec-15 4:06am

Tomas Takac

v2

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DamithSL · Answer 1 · 2015-12-15T04:15:00

C#

// create method to return gender list, for example call it as GetGenders()



public ActionResult Create()
{
   model.Gender = GetGenders();
   return View(model);
}
 
[HttpPost]
public ActionResult Create(UserProfileCreateViewModel model)
{
   if (ModelState.IsValid)
   {
      UserProfile user = new UserProfile();
      user.GENDER_ID = model.GenderID;
 
      _UserProfileRepository.Add(user);
      _UserProfileRepository.Save();
 
      return RedirectToAction("Index", "Home");
   }
   //repopulate your SelectList properties if model not valid
   model.Gender = GetGenders();
   return View(model);
}