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How to specify service lifetime for register service that added as a dependency C# Asp.net Core?
Built-in IoC container manages the lifetime of a registered service type. It automatically disposes a service instance based on the specified lifetime.
The built-in IoC container supports three kinds of lifetimes −
Singleton − IoC container will create and share a single instance of a service throughout the application's lifetime.
Transient − The IoC container will create a new instance of the specified service type every time you ask for it.
Scoped − IoC container will create an instance of the specified service type once per request and will be shared in a single request.
Example
public interface ILog{
void info(string str);
}
class MyConsoleLogger : ILog{
public void info(string str){
Console.WriteLine(str);
}
}public class Startup{
public void ConfigureServices(IServiceCollection services){
services.Add(new ServiceDescriptor(typeof(ILog), new
MyConsoleLogger())); // singleton
services.Add(new ServiceDescriptor(typeof(ILog),
typeof(MyConsoleLogger), ServiceLifetime.Transient)); // Transient
services.Add(new ServiceDescriptor(typeof(ILog),
typeof(MyConsoleLogger), ServiceLifetime.Scoped)); // Scoped
}
}The following example shows the ways of registering types (service) using extension methods.
public class Startup{
public void ConfigureServices(IServiceCollection services){
services.AddSingleton<ILog, MyConsoleLogger>();
services.AddSingleton(typeof(ILog), typeof(MyConsoleLogger));
services.AddTransient<ILog, MyConsoleLogger>();
services.AddTransient(typeof(ILog), typeof(MyConsoleLogger));
services.AddScoped<ILog, MyConsoleLogger>();
services.AddScoped(typeof(ILog), typeof(MyConsoleLogger));
}
}
Updated on: 25-Sep-2020
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