What is the best way to registering multiple services? - asp.net-core

Question

I already know, to register customized managers same as 'Identity.UserManager', we have to register them.
but there is any way to prevent register multi-managers?

Answer 1

Thanks to #GOF, the best way is using 'Decorator Design Pattern':
a) Creating main class Managers/DecoratorManager.cs:
using Microsoft.AspNetCore.Identity;
namespace MyProject_WebMVC.Managers
{
public interface IDecoratorManager { }
public class DecoratorManager : IDecoratorManager
{
protected Data.ApplicationDbContext DB { get; }
protected UserManager<Models.User> UserManager { get; }
public DecoratorManager(Data.ApplicationDbContext dbContext,
UserManager<Models.User> userManager)
{
DB = dbContext;
UserManager = userManager;
}
protected DecoratorManager(DecoratorManager manager)
{
DB = manager.DB;
UserManager = manager.UserManager;
}
}
}
b) Register it by Startup.cs:
public void ConfigureServices(IServiceCollection services)
{
...
//! Custom storage manager
services.AddScoped<Managers.IDecoratorManager, Managers.DecoratorManager>();
...
}
c) Inject decorator on Views/_VeiwImports.cs:
#inject Managers.IDecoratorManager Manage
d) Define your manager like this, Ex. ProfileManager.cs:
namespace MyProject_WebMVC.Managers
{
public class ProfileManager : DecoratorManager
{
public ProfileManager(IDecoratorManager manager) : base(manager as DecoratorManager) { }
public bool IsThisWorking() => true;
}
}
e) Define another manager, Ex. StorageManager.cs:
namespace MyProject_WebMVC.Managers
{
public class StorageManager : DecoratorManager
{
public StorageManager(IDecoratorManager manager) : base(manager as DecoratorManager) { }
public string GetWelcomeMessage() => "Hello Message";
}
}
f) And now you can use it what ever you want, Ex. MyView.cshtml
#{
var profileManager = new Managers.ProfileManager(Manager);
var storageManager = new Managers.StorageManager(Manager);
}
<h1>#storageManager.GetWelcomeMessage()</h1>
#if(profileManager.IsThisWorking()) { <h2>This is grate :)</h2> }