ASP .NET Core 實例獲取的方法

1 private readonly ILogger<HomeController> _logger;
2 public HomeController(ILogger<HomeController> logger)
3 {
4     _logger = logger;
5 }

1 public IActionResult Index([FromServices] ILogger<HomeController> logger)
2 {
3     return View();
4 }

1 [FromServices] 
2 public ILogger<HomeController> logger{get;set;}

1 [AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
2 public class FromServicesForPropertyAttribute : Attribute, IBindingSourceMetadata
3 {
4     public BindingSource BindingSource => BindingSource.Services;
5 }

public static class Global
{
    private static IServiceProvider _provider;

    public static void SetServiceProvider(IServiceProvider provider)
    {
        _provider = provider;
    }

    public static T? GetService<T>()
    {
        return _provider.GetService<T>();
    }
}