Question

I have model property:

public int? RegionId { get; set; }

I create dropdownlist in view:

@Html.DropDownListFor(m => m.RegionId, Model.Regions)

In html:

<select data-val="true" data-val-number="The field RegionId must be a number." 
</select>

I need to remove the attribute data-val-number, because in a particular case it not right for me.

I try in Application_Start:

DataAnnotationsModelValidatorProvider.AddImplicitRequiredAttributeForValueTypes = false;

Also note RegionId is nullable.

How I can remove this attribute on server-side code? (not javascript)

Answer 1

In List need add this item:

new SelectListItem {Text =SiteResources.NotSelected, Selected = true,
Value = “”} //(not Value=null)

And this item will be valid for data-val-number

Another way In Application_Start:

ModelValidatorProviders.Providers.Clear();
ModelValidatorProviders.Providers.Add(new DataAnnotationsModelValidatorProvider());

But apparently disable implicit DataAnnotation validation for all simple types.