Why dont show kendo ui grid validation on editor template

Why not show grid validation to me on editor template on editing field? I don't understand why not reading data annotation. Sorry for bad english language...

At first I created kendo grid like this:

 <div id="grid"> @(Html.Kendo().Grid<CardView>() .Name("Grid") .Columns(x => { x.Bound(c => c.CardID).Title("Card Nm."); x.Bound(c => c.ExpirationDate).Format("{0:dd/MM/yyyy}");//.EditorTemplateName("KendoDatePicker"); x.Command(cmd => { cmd.Edit(); }).Title("Edit"); }) .BindTo(Model) .DataSource(dataSource => dataSource .Ajax() .Model(model => { model.Id(x => x.CardID); }) .ServerOperation(true) .Read(read => read.Action("Index", "Home")) .Events(events => events.Error("error_handler")) .Update(update => update.Action("Update", "Home")) .Editable(editable =>editable.Mode(GridEditMode.InLine))) </div> 

Here is javascript which is using in datasource event error:

<script> function error_handler(e, status) {//Klaidu isvedimas if (e.errors) { var message = "Error:\n"; var grid = $('#GrdKendo').data('kendoGrid'); var gridElement = grid.editable.element; var validationMessageTemplate = kendo.template( "<div id='#=field#_validationMessage' " + "class='k-widget k-tooltip k-tooltip-validation " + "k-invalid-msg field-validation-error' " + "style='margin: 0.5em;' data-for='#=field#' " + "data-val-msg-for='#=field#' role='alert'>" + "<span class='k-icon k-warning'></span>" + "#=message#" + "<div class='k-callout k-callout-n'></div>" + "</div>"); $.each(e.errors, function (key, value) { if (value.errors) { gridElement.find("[data-valmsg-for=" + key + "],[data-val-msg-for=" + key + "]") .replaceWith(validationMessageTemplate({ field: key, message: value.errors[0] })); gridElement.find("input[name=" + key + "]").focus(); } }); grid.one("dataBinding", function (e) { e.preventDefault(); // cancel grid rebind }); } } 

When I created my viewModel(validation on CardID working, but dont working on expirationDate which using editor template):

public class CardView { [Required(ErrorMessage = "Card Expiration Date")] public virtual string CardID { get; set; } [UIHint("DatePicker")] [Required(ErrorMessage = "Card Expiration Date")] public virtual DateTime ExpirationDate { get; set; } } 

And I created editor template in Views\Shared\EditorTemplates** location with name **DatePicker.cshtml :

 @model DateTime? @(Html.Kendo() .DatePicker() .Name(ViewData.ModelMetadata.PropertyName.ToString()) .Format("{0:dd/MM/yyyy}")) 

So how to read data annotacion on editor template field? Data annotacions works perfect on field which is not using editor template