How to use localization resource file?

Question

I am developing a blazor server app and now I want to use localization.

I create res1.en.resx and res1.fr.resx, but I can't create a designer class, it throw an exception, but no logs. I tried to create a normal resource file, I succedded.

So I think maybe ResXFileCodeGenerator doesn't support localization resource file? If I can't create the designer class, I can't user IStringLocalizer either, for no class can be passed in as generic arguments.

Answer 1

I had a test in my side with VS 2022 and .net 7 blazor server application. I followed this official document. Firstly, it mentioned that

IStringLocalizer and IStringLocalizer are supported in Blazor apps.

And it doesn't mention the ResXFileCodeGenerator is necessary for IStringLocalizer in blazor server. But I also test it. I had Resource folder and res1.resx res1.fr.resx res1.cn.resx. When I add property ResXFileCodeGenerator to Custom Tool, VS will generate Designer file automatically. But it won't generate file when I add this property to other resx files.

Then I added builder.Services.AddLocalization(); and put below codes just behind app.UseRouting();

var supportedCultures = new[] { "fr", "en-US", "zh-CN" };
var localizationOptions = new RequestLocalizationOptions()
    .SetDefaultCulture(supportedCultures[0])
    .AddSupportedCultures(supportedCultures)
    .AddSupportedUICultures(supportedCultures);
app.UseRequestLocalization(localizationOptions);

Then in my Index.razor component, I have codes below which displayed correctly for me. I change the language by modifying the language configuration in browser.

@using BlazorAppHotRelaod.Resources
@using Microsoft.Extensions.Localization
@using System.Globalization
@inject IStringLocalizer<res1> Loc

<p>
    <b>CurrentCulture</b>: @CultureInfo.CurrentCulture
</p>
<p>
    @Loc["Hello"]
</p>