Value of DropdownList is null when it has single row in popup grid

[Adem]

I have a grid like this:

@(Html.Kendo().Grid<License>()
      .Name("popupGrid")
      .Columns(columns =>
      {
          columns.Bound(p => p.LicenseId).Width(20).Hidden().HeaderHtmlAttributes(new { @title = "License" });
          columns.ForeignKey(p => p.CustomerId, (System.Collections.IEnumerable)ViewData["customers"], "CustomerID", "CustomerName")
            .Title("Customer").Width(200);
          columns.Bound(p => p.VendorId).Width(20).HeaderHtmlAttributes(new { @title = "Vendor" });
          columns.Bound(p => p.ProductId).Width(20).HeaderHtmlAttributes(new { @title = "Product" });
          columns.Command(p => p.Edit().Text("Edit").HtmlAttributes(new { @title = "Edit" })).Width(80);
      })
          .ToolBar(toolbar => toolbar.Create().Text("Add").HtmlAttributes(new { @title = "Add" }))
      .Editable(editable => editable.Mode(GridEditMode.PopUp).TemplateName("PopupEditView"))
      .Events(e => e.Edit("onEdit"))
      .DataSource(dataSource => dataSource
          .Ajax()
          .Model(model => model.Id(p => p.LicenseId))
              .Create(create => create.Action("Create", "Home").Type(HttpVerbs.Post))
              .Read(read => read.Action("Read", "Home").Type(HttpVerbs.Post))
              .Update(update => update.Action("Update", "Home").Type(HttpVerbs.Post))
          )
)

and PopupEditView.cshtml :

@(Html.Kendo().DropDownListFor(m => m.CustomerId).Name("CustomerId")
                  .ValuePrimitive(true)
                  .DataTextField("CustomerName")
                  .DataValueField("CustomerId")
               //.OptionLabel("Select Customer...")
                  .DataSource(dataSource =>
                  {
                      dataSource.Read(read => read.Action("GetCustomers", "Home"))
                                .ServerFiltering(true);
                  })
            )
            @Html.ValidationMessageFor(m => m.CustomerId)

HomeController : 

[HttpPost]
        public JsonResult Create([DataSourceRequest] DataSourceRequest request, License license)
        {
            if (license != null && ModelState.IsValid) // licence.CustomerId is null Model.State is not valid
            {
                LicenseRepository.Repository.Insert(license);
            }

            return Json(new[] { license }.ToDataSourceResult(request, ModelState));
        }

        public JsonResult GetCustomers()
        {
            return Json(CustomerRepository.Repository.Customers, JsonRequestBehavior.AllowGet);
        }

If .OptionLabel("Select Customer...") is commented  and submit create then licence then CustomerId is null. If user change DropDownList(CustomerId) then it works fine.

Is this a bug? 

 

[Adem]

Hi Telerik Team,

You can try this issue on here . (telerik_ui-for-aspnet-mvc-examples-master\grid\grid-editing-cascading-dropdownlist) 

 

[Nikolay Rusev]

Hello Adem,

I've tried to replicate the behavior, but wasn't able to. I'm sending the example which you mention attached to this post. Could you please modify it so that it illustrates the behavior in question?

Regards,
Nikolay Rusev
Telerik

[Adem]

I tried your example. But I used ASP.NET MVC 5.2.3 and Kendo.Mvc(latest version)

I didn't change value of Customer Id. (I didn't handled(touch) DropDownlist of Customer) , only I selected vendorId and Product Id and submitted. 

But customer Id's value has been 0 instead of 1. 

You can look at Screenshots.

[Nikolay Rusev]

Hello Adem,

 

I see what you mean now. The value stays 0 as the default value for the field type is 0. 

That said the correct configuration for the scenario is to define default value for the `CustomerId` field.

 

Example:

.DataSource(dataSource => dataSource
          .Ajax()
          .Model(model =>
          {
              model.Id(p => p.LicenseId);
              model.Field(p => p.CustomerId).DefaultValue(1);
          })

 

 

 

Regards,

Nikolay Rusev

Telerik