Asp.Net Core Multiple Dependency Injection
public interface ISms
{
string SmsSend();
}
public interface IMail
{
string Send();
}
public interface IFileConverter
{
string Convert();
} public class MailA : IMail
{
public string Send()
{
return "Mail A";
}
}
public class MailB : IMail
{
public string Send()
{
return "Mail B";
}
}
public class MailC : IMail
{
public string Send()
{
return "Mail C";
}
}
public class MailX : IMail, ISms
{
public string Send()
{
return "Mail X";
}
public string SmsSend()
{
return "Sms Send";
}
}
public class JsonConverter : IFileConverter
{
public string Convert()
{
return "Json Converter";
}
}
public class XmlConverter : IFileConverter
{
public string Convert()
{
return "Xml Converter";
}
}
public class CsvConverter : IFileConverter
{
public string Convert()
{
return "Csv Converter";
}
}register services extension
public static class DependencyInjectionExtension
{
public static IServiceCollection AddSmsServices(this IServiceCollection services)
{
return services.AddTransient<ISms, MailX>();
}
public static IServiceCollection AddMailServices(this IServiceCollection services)
{
services.AddTransient<IMail, MailA>();
services.AddTransient<IMail, MailB>();
services.AddTransient<IMail, MailC>();
services.AddTransient<IMail, MailX>();
return services;
}
//v1
public static IServiceCollection AddFileConverterServices(this IServiceCollection services, string key)
{
switch (key)
{
case "JsonConverter":
services.AddScoped<IFileConverter, JsonConverter>();
break;
case "XmlConverter":
services.AddScoped<IFileConverter, XmlConverter>();
break;
case "CsvConverter":
services.AddScoped<IFileConverter, CsvConverter>();
break;
default:
break;
///return null;
///throw new KeyNotFoundException();
}
return services;
}
//v2
public static IServiceCollection AddFileConverterDelgServices(this IServiceCollection services)
{
services.AddScoped<Func<string, IFileConverter>>(serviceProvider => key =>
{
switch (key)
{
case "JsonConverter":
return new JsonConverter();
case "XmlConverter":
return new XmlConverter();
case "CsvConverter":
return new CsvConverter();
default:
return null;
///throw new KeyNotFoundException();
}
});
return services;
}
}in appsettings.json json file
"ActiveFileConverter": "XmlConverter"in Startup.cs class
public void ConfigureServices(IServiceCollection services)
{
services.AddSmsServices();
services.AddMailServices();
services.AddFileConverterServices(Configuration["ActiveFileConverter"]);//v1
services.AddFileConverterDelgServices();//v2
services.AddMvc();
}call DI services in HomeController.cs
public class HomeController : Controller
{
private readonly ISms _sms;
private readonly IEnumerable<IMail> _mails;
private readonly IFileConverter _fileConverter;//v1
private readonly Func<string, IFileConverter> _fileConverterDelg;//v2
public HomeController(ISms sms,
IEnumerable<IMail> mails,
IFileConverter fileConverter,//v1
Func<string, IFileConverter> fileConverterDelg//v2
)
{
_sms = sms;
_mails = mails;
_fileConverter = fileConverter;//v1
_fileConverterDelg = fileConverterDelg;//v2
}
public IActionResult Index()
{
StringBuilder stringBuilder = new StringBuilder();
//sms
stringBuilder.Append(_sms.SmsSend() + " \n");
//mails
///var mailA = _mails.First(o =>o is MailA);
///var mailA = _mails.First(o => o.GetType() == typeof(MailA));
//or
///var mailA = _mails.First(o => o.GetType().Name.Equals("MailA"));
foreach (var mail in _mails)
{
stringBuilder.Append(mail.Send() + "\n");
}
//file Converter
stringBuilder.Append(_fileConverter.Convert());//v1
///stringBuilder.Append(_fileConverterDelg("XmlConverter").Convert());//v2
return Content(stringBuilder.ToString());
}
/// <summary>
/// using Microsoft.Extensions.DependencyInjection;
/// </summary>
/// <returns></returns>
public IActionResult GeteServicesInFunction()
{
StringBuilder stringBuilder = new StringBuilder();
//sms
ISms smsService = HttpContext.RequestServices.GetService<ISms>();
stringBuilder.Append(smsService.SmsSend() + " \n");
//mails
IEnumerable<IMail> mailServices = HttpContext.RequestServices.GetServices<IMail>();
foreach (var mail in mailServices)
{
stringBuilder.Append(mail.Send() + "\n");
}
//file Converter
IFileConverter fileConverterService = HttpContext.RequestServices.GetService<IFileConverter>();//v1
Func<string, IFileConverter> fileConverterServiceDelg = HttpContext.RequestServices.GetService<Func<string, IFileConverter>>();//v2
stringBuilder.Append(fileConverterService.Convert());//v1
///stringBuilder.Append(fileConverterServiceDelg("XmlConverter").Convert());//v2
return Content(stringBuilder.ToString());
}
}url http://localhost:8359 output
Sms Send
Mail A
Mail B
Mail C
Mail X
Xml Converterurl http://localhost:8359/Home/GeteServicesInFunction output
Sms Send
Mail A
Mail B
Mail C
Mail X
Xml Converter