How can I apply Globalization and Location to Null type reference and DataAnnotations messages back from an API in .NET Core?

Question

How can I apply Globalization and Location to Null type reference and DataAnnotations messages back from an API in .NET Core?

AC 41

I would like to apply Globalization and Localization in my API, but there are some messages that come in English directly from the system.
My idea is to include in which language they want the answer to the request and give it back.
We are using .Net 6 and C#10.

Let me know which options I could try.

Thanks.
Alvaro.

Answer 1

AgaveJoe 20,226

Localization and globalization is covered in the official docs.

Globalization and localization in ASP.NET Core

The browser passes culture information to the a web application. Web API does not have a user interface so for a multi-culture Web API you'll need to find a way to pass the culture information to Web API. Maybe use routes to drive the culture for the current request.

Since you get to pass whatever error message back to the client, that bit of logic should not be a problem.

AC 41 Reputation points

2022-02-04T15:43:06.527+00:00

Thanks for your answer.

So how can I intercept the message generated automatically by the system for the Data Annotations and send another message in the correct language back?

One example is if you placed the [Required] validation.

Regards,
Alvaro

AgaveJoe 20,226

Use the standard model validation pattern found in every beginning level tutorial.

Model Validation in ASP.NET Web API

        public HttpResponseMessage Post(Product product)  
        {  
            if (ModelState.IsValid)  
            {  
                // Do something with the product (not shown).  
  
                return new HttpResponseMessage(HttpStatusCode.OK);  
            }  
            else  
            {  
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);  
            }  
        }  
    }

How can I apply Globalization and Location to Null type reference and DataAnnotations messages back from an API in .NET Core?

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