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V22.2

DashboardLocalizationProvider Class

A service required for Web Dashboard localization.

Namespace: DevExpress.DashboardAspNetCore

Assembly: DevExpress.Dashboard.v22.2.AspNetCore.dll

NuGet Package: DevExpress.AspNetCore.Dashboard

Declaration

public class DashboardLocalizationProvider :
    IDashboardLocalizationProvider

Remarks

Register the DashboardLocalizationProvider as a singleton service:

public void ConfigureServices(IServiceCollection services) {
    // ...
    services.AddSingleton<IDashboardLocalizationProvider, DashboardLocalizationProvider>();
}

You can also implement the IDashboardLocalizationProvider interface to create a custom localization provider.

using DevExpress.DashboardWeb;

public class DashboardWasmLocalizationProvider : IDashboardLocalizationProvider {
    IServiceProvider serviceProvider;
    Func<IEnumerable<string>> getJsonsListDelegate;

    public DashboardWasmLocalizationProvider(IServiceProvider serviceProvider, Func<IEnumerable<string>> getJsonsListDelegate) {
        this.serviceProvider = serviceProvider;
        this.getJsonsListDelegate = getJsonsListDelegate;
    }

    async Task<Dictionary<string, string>> ReadFileAsync(HttpClient httpClient, string fileName) {
        var httpRes = await httpClient.GetAsync(fileName);
        if(httpRes.StatusCode == HttpStatusCode.NotFound) {
            return new Dictionary<string, string>();
        }
        var response = await httpRes.Content.ReadAsByteArrayAsync();
        return JsonSerializer.Deserialize<Dictionary<string, string>>(response);
    }

    public async Task<Dictionary<string, string>> GetLocalizationMessagesAsync() {
        using(IServiceScope scope = serviceProvider.CreateScope()) {
            HttpClient httpClient = scope.ServiceProvider.GetService<HttpClient>();
            var jsons = await Task.WhenAll(getJsonsListDelegate().Select(fileName => ReadFileAsync(httpClient, fileName)));
            return jsons.SelectMany(dict => dict).ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
        }
    }
}

Use this provider when you register the Dashboard Localization Service:

public static async Task Main(string[] args) {
    var builder = WebAssemblyHostBuilder.CreateDefault(args);
    // ...
    builder.Services.AddSingleton<IDashboardLocalizationProvider>(sp => new DashboardWasmLocalizationProvider(sp, () => {
        switch(CultureInfo.CurrentUICulture.TwoLetterISOLanguageName) {
            case "de":
                return new string[] {
                    "./localization/de/dx-dashboard.de.json",
                    "./localization/de/dx-analytics-core.de.json",
            };
            default:
                return new string[] { };
        }
    }));
}

Inheritance

Object
DashboardLocalizationProvider
See Also