MVC Annotation validation Remove data-val attribute

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)

What do you plan to put in the RegionId property? It is an integer so you aren't going to be able to put a none numeric value into it. — AlexC
– AlexC, Commented Aug 28, 2012 at 9:50
I need add him, but data-val-number validation works earlier — DeeRain
– DeeRain, Commented Aug 28, 2012 at 10:12

DeeRain · Accepted Answer · 2012-08-28 10:24:53Z

6

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.

edited Aug 28, 2012 at 10:24

answered Aug 28, 2012 at 10:06

DeeRain

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Comments

Giorgio Minardi · Accepted Answer · 2012-08-28 10:09:08Z

0

As said in the comment by AlexC, if your model expect an integer then you'll need to pass a number. You can avoid to get the validation message by removing the ValidationFor helper, but until the type doesn't match then the Model.IsValid will never be true. If you want to bind a null value to a control, you can do it and your Model.Regions will be something like this

"--Please Select--", Value: null
"US", Value:"1",
"Asia", Value:"2"

answered Aug 28, 2012 at 10:09

Giorgio Minardi

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2 Comments

DeeRain Over a year ago

In Model.Regions i put: new SelectListItem {Text =SiteResources.NotSelected, Selected = true, Value = null}. But when choose this item in page i see "The field RegionId must be a number."

DeeRain Over a year ago

new SelectListItem {Text =SiteResources.NotSelected, Selected = true, Value = ""} is validated! Good!

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