Blazor WASM Lasy loading DI

Question

Hello.

For DI with LAZY LOADING I need to call my service. BUT how to pass the expected ILogger ?

public class LazyLoadedServices
{
    private readonly IServiceProvider _services;


    public LazyLoadedServices(IServiceProvider services)
	{
        this._services = services;
   
    }

    public IFicheEspaceClosDataService Create()
    {
        HttpClient http = this._services.GetRequiredService<HttpClient>();
        return new FicheDataService(http, ?????????????);
    }
}

See the ??????????????

And my service class :

public class FicheDataService : IFicheDataService
{
    private readonly HttpClient _httpClient;
    private readonly ILogger<FicheService> _logger;
    public FicheDataService(HttpClient httpClient, ILogger<FicheDataService> logger)
    {
        _httpClient = httpClient;
        _logger = logger;
    }

Thanks a lot.

Answer 1

Hi @prof cegep

For DI with LAZY LOADING I need to call my service. BUT how to pass the expected ILogger ?

You can modify your code as blow:

    public interface IFicheDataService
    {
        string GetData();
    }

    public class FicheDataService : IFicheDataService
    {
        private readonly HttpClient _httpClient;
        private readonly ILogger<FicheDataService> _logger;
        public FicheDataService(HttpClient httpClient, ILogger<FicheDataService> logger)
        {
            _httpClient = httpClient;
            _logger = logger;
        }
        public string GetData()
        {
            _logger.LogInformation("FicheDataService is called ");
            return "OK";
        }
    }

    public class LazyLoadedServices
    {
        private readonly IServiceProvider _services;
        private readonly ILogger<FicheDataService> _logger;

        public LazyLoadedServices(IServiceProvider services, ILogger<FicheDataService> logger)
        {
            this._services = services;
            _logger = logger;
        }

        public FicheDataService Create()
        {
            _logger.LogInformation("LazyLoadedServices is called ");
            HttpClient http = this._services.GetRequiredService<HttpClient>();
            return new FicheDataService(http, _logger);
        }
    }

Then, in the Program.cs file, register the service like this:

builder.Services.AddScoped<IFicheDataService, FicheDataService>();
builder.Services.AddScoped<LazyLoadedServices>();

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