How can I globally overload error messages getting ,for example, from [Required] attribute? Probably, I should change CultureInfo, but I can't find any tutorials. Language still English as default. Thank you!
2 Answers
A first reference on globalization and localization of ASP.NET Core is https://docs.asp.net/en/latest/fundamentals/localization.html.
There you'll find information about how to translate data annotations and how to configure ASP.NET Core to select the appropriate language / CultureInfo for each request.
DataAnnotations error messages are localized with
IStringLocalizer<T>. Using the option ResourcesPath = "Resources", the error messages in RegisterViewModel can be stored in either of the following paths:Resources/ViewModels.Account.RegisterViewModel.fr.resx Resources/ViewModels/Account/RegisterViewModel.fr.resx
For built-in error messages for identity models (like "This email is already taken.) or basic validation texts you have to do some more configuration. I have documented some work in ASP.Net Core localization.
2 Comments
loqie
Thank you for answer and link, hope asp.net core team will make it simpler in future, just like in asp.net mvc.
Frédéric
Unfortunately, no, they seem to have no intent of making it simpler. It baffles me all projects have to translate and globalize default validation logic themselves instead of having it out of the box. But all issues I found about that were closed without being done. I have tried opening a new one.
You can try using ErrorMessageResourceName and ErrorMessageResourceType, using resource files to store messages.
[Required(ErrorMessage = @"This is required")]but that'll be only in one language.ErrorMessageworking good and display any languages, but this is ugly to write same text all the time.