Asp.Net MVC 2 - Changing the PropertyValueRequired string

Question

Using a resx file in the App_GlobalResources directory, I've been able to change the default message for the PropertyValueInvalid string of the model validators.

But it doesn't work to translate the message when a value is required (PropertyValueRequired.)

In the Global.asax.cs Application_Start() I've changed the resource class key, like this:

DefaultModelBinder.ResourceClassKey = "Messages";

And in the Messages.resx files I've put two entries:

"PropertyValueInvalid" => "O valor '{0}' é inválido para o campo {1}."
"PropertyValueRequired" = > "É necessário digitar o {0}."

Thanks.

@mare What is your exact problem - PropertyValueRequired message is not being used from resx file in modal validation using data annotation? — swapneel, Mar 03 '11 at 19:22
I think Darin's is a bit better , it's an upgrade of your solution. — mare, Mar 10 '11 at 21:05

score 17 · Answer 1 · answered Mar 06 '11 at 00:53

17

RequiredAttribute not used DefaultModelBinder.GetValueRequiredResource. Create custom DataAnnotationsModelValidator class.

public class MyRequiredAttributeAdapter : RequiredAttributeAdapter
{
  public MyRequiredAttributeAdapter(ModelMetadata metadata, 
                                    ControllerContext context, 
                                    RequiredAttribute attribute) 
         : base(metadata, context, attribute)
  {
    attribute.ErrorMessageResourceType = typeof (Messages);
    attribute.ErrorMessageResourceName = "PropertyValueRequired";
  }
}

and register adapter in Global.asax.

DataAnnotationsModelValidatorProvider.RegisterAdapter(
    typeof(RequiredAttribute), 
    typeof(MyRequiredAttributeAdapter));

Hope this help!

Reusable Validation Error Message Resource Strings for DataAnnotations

answered Mar 06 '11 at 00:53

takepara

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2

+1 This is exactly what I have been looking for, thanks! (ps: the link is broken) – mateuscb Oct 05 '11 at 14:54
this is the best answer i've found on this subject – Laguna Sep 07 '12 at 14:49
1

This is great. Please also see this for a solution to a trouble you might run into http://stackoverflow.com/a/16211476/268091 – MEMark Mar 20 '14 at 15:56
Where is a good best practice place to store the DataAnnotationsModelValidator class? – niico Jul 31 '16 at 21:58
also what namespaces (using) does this require? – niico Jul 31 '16 at 22:09
It can't find messages. I have added references to using System.Web.Mvc; & using System.ComponentModel.DataAnnotations; – niico Jul 31 '16 at 22:21
@niico Messages class in the line attribute.ErrorMessageResourceType = typeof (Messages); is the name of the resourcefile! – Jon Koeter Nov 04 '16 at 09:08
Link is down now, can anyone help? – iYazee6 May 04 '19 at 15:22

score 9 · Answer 2 · answered Mar 05 '11 at 15:39

9

This message is baked into System.ComponentModel.DataAnnotations assembly under the key RequiredAttribute_ValidationError. You could write a custom validation attribute:

public class MyRequiredAttribute : RequiredAttribute
{
    public MyRequiredAttribute()
    {
        ErrorMessageResourceType = typeof(Messages);
        ErrorMessageResourceName = "Required";
    }
}

and then inside your Messages.resx file define the Required string:

Required => É necessário digitar o {0}.

and finally decorate your view model property with this custom attribute:

public class MyViewModel
{
    [MyRequired]
    public int Foo { get; set; }
}

answered Mar 05 '11 at 15:39

Darin Dimitrov

1,023,142
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So for the same concept the ASP.NET MVC team is using two different constructs? – mare Mar 07 '11 at 13:02
@mare, we can only hope that this will be fixed/made easier in future versions of MVC. – Darin Dimitrov Mar 07 '11 at 13:36
1

For this to work on client-side in ASP.NET MVC 3 you will need to either register the custom attribute (http://stackoverflow.com/a/5954452/169) or use AttributeAdapter approach (http://stackoverflow.com/a/5207912/169). – Arnold Zokas Jan 16 '12 at 01:26

score 0 · Answer 3 · answered Aug 25 '15 at 08:48

0

Just add like this

[Required(ErrorMessage = "Your Error Message, here..!")]

answered Aug 25 '15 at 08:48

Karthikeyan P

1,216
1
20
23

score 0 · Answer 4 · edited Jun 20 '20 at 09:12

0

How about

[Required (ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Messages)]

public string Foo { get; set; }

Required => É necessário digitar o {0}.

Or

Required => {0} field is required.

Please refer below link for complete asp.net mvc localisation guide asp.net mvc localisation guide

edited Jun 20 '20 at 09:12

Community

1
1

answered Mar 05 '11 at 16:36

swapneel

3,061
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how to make it global so it doesn't need to add (ErrorMessageResourceName="Required",ErrorMessageResourceType=typeof(Messages). or how to make error message for the field needed a integer value but user enters 'abc' – mahdi gh Aug 25 '13 at 07:11
not sure what you mean by - make it global but for integer value error message - Does this help? http://stackoverflow.com/questions/9522369/how-use-data-annotations-for-verifying-input-particular-type – swapneel Aug 25 '13 at 10:34

Asp.Net MVC 2 - Changing the PropertyValueRequired string

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