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c#dependency-injectionasp.net-coreextension-methods
Tiago
Tiago

Reputation: 3141

Injecting DI service on a extension method

I'm trying to get the IStringLocalizer service instance inside a extension method, is it possible? Any suggestions on how should I inject it?

My goal here is to translate a type using its name as convention.

public static class I18nExtensions
{

    private IStringLocalizer _localizer; // <<< How to inject it?

    public static string GetName(this Type type)
    {
        return _localizer[type.Name].Value;
    }
}

Upvotes: 14

Views: 14885

Answers (2)

Tiago
Tiago

Reputation: 3141

Following @NightOwl888 comment I was in the wrong path, I ended up creating the following service:

public class TypeNameLocalizer : ITypeNameLocalizer
{
    private IStringLocalizer localizer;

    public TypeNameLocalizer(IStringLocalizer<Entities> localizer) 
    {
        this.localizer = localizer;
    }
    public string this[Type type] 
    { 
        get
        {
            return localizer[type.Name];
        }
    }
}

Credit: @NightOwl888

Upvotes: 6

Henk Mollema
Henk Mollema

Reputation: 46641

Why not just pass the IStringLocalizer as a parameter:

public static string GetName(this Type type, IStringLocalizer localizer)
{
    return localizer[type.Name].Value;
}

The purpose of extension methods is to extend behavior of objects. It seems to me that is what you're trying to do here.

Upvotes: 5

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