Asp net core set custom dependencyinjection service lifecycle

Introduction

ASP.NET is a popular programming language used for web applications. It provides a framework for developing websites, web services, and web applications. One of the key features of ASP.NET is its for dependency , which allows to manage and control the lifecycle of services used in their applications.

Understanding Dependency Injection

Dependency injection is a design pattern that allows objects to be loosely coupled and promotes code reusability. In ASP.NET, dependency injection is achieved through the built-in dependency injection container, which manages the creation and disposal of objects.

Setting Service Lifecycle

By default, ASP.NET Core uses a transient service lifecycle, which means that a new instance of a service is created each time it is requested. However, there may be cases where you want to control the lifecycle of a service and have more control over its creation and disposal.

To set a custom service lifecycle, you can use the AddScoped method in the ConfigureServices method of your application's startup . This method allows you to specify the lifetime of the service.


public void ConfigureServices(IServiceCollection services)
{
    services.AddScoped();
}

In the above example, we are setting the lifecycle of the MyService class to scoped. This means that a new instance of MyService will be created for each request within the same . Once the request is completed, the instance will be disposed of.

Example: Custom Service Lifecycle

Let's consider an example where we have a service called LoggerService that logs messages to a file. We want to ensure that the same instance of LoggerService is used throughout the lifetime of a request.


public interface ILoggerService
{
    void Log(string message);
}

public class LoggerService : ILoggerService
{
    public void Log(string message)
    {
        // Log the message to a file
    }
}

To set the custom service lifecycle for LoggerService, we can modify the ConfigureServices method as follows:


public void ConfigureServices(IServiceCollection services)
{
    services.AddScoped();
}

Now, whenever we inject ILoggerService into our controllers or services, the same instance of LoggerService will be used throughout the lifetime of a request.

Conclusion

Setting a custom service lifecycle in ASP.NET allows developers to have more control over the creation and disposal of services. By the AddScoped method, you can specify the lifetime of a service and ensure that the same instance is used throughout the lifetime of a request. This promotes code reusability and improves the performance of your application.

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