MVC Localization of Default Model Binder

Question

I am currently trying to figure out how to localize the error messages generated by MVC. Let me use the default model binder as an example, so I can explain the problem.

Answer 1

Have you tried: IDataErrorInfo property

This article will help

• Validating with the IErrorDataInfo Interface (C#)

Answer 2

See http://forums.asp.net/p/1512140/3608427.aspx, scroll down to Brad Wilson's reply near the bottom of that page (Sat, Jan 09 2010, 3:20 PM). There are static properties on the DefaultModelBinder that you can set to localize the generic error messages.

The reason a generic error message is used instead of your [Range] message is that [Range] provides a validation error message, but this particular case is a binding error. There's absolutely no way the framework can ever hope to convert the string "ten" to an Int32, so it can't even fire the [Range] validator. This is what the "PropertyValueInvalid" key as mentioned in that forum controls.

Answer 3

In MVC3 do the following to change default messages:

1. add the App_GlobalResources folder to your ASP.NET site
2. add a new resource file, call it f.ex. MyResources.resx
3. add these keys
   • PropertyValueRequired: A value is required.
   • PropertyValueInvalid: The value '{0}' is not valid for {1}.
4. in Application_Start of global.asax.cs add the line DefaultModelBinder.ResourceClassKey = "MyResources";