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ASP.NET 5 Hosting - HostForLIFE.eu :: ASP.NET 5 Dependency Injection

clock April 8, 2016 00:40 by author Anthony

Dependency Injection occurs when a software component (in this case, the class) given their dependencies through their constructors, methods, or directly into the fields. Simply put, Dependency Injection is passing or setting of dependencies into a software component (Dependency Injection Container). In other words, if a class can not do his job without a dependency, then there was a dependency injection. Classes are diinject, not only can build the object, but also its behavior.

Dependency injection can be done through three ways :

  • Constructor Injection
  • Setter Injection
  • Interface Injection

ASP.NET 5 has dependcy injection available at framework level and ASP.NET 5 makes heavy use of it. Most of things surrounding controllers, views and other MVC components are implemented as services that web applications consume. This post is quick overview of dependency injection in ASP.NET 5 with some examples.

Registering services

Services are registered when application starts. It happens in Startup class. There is method called ConfigureServices() and in the end of this method I usually define service mappings.

public virtual void ConfigureServices(IServiceCollection services)
{
    // configure services
 
    var settings = new Settings();
 
    // initialize custom settings
 
    services.AddInstance(settings);
    services.AddScoped<IFileClient, AzureFileClient>();
    services.AddScoped<IMapperSession, MapperSession>();
    services.AddScoped<IProductService, ProductService>();
}

Available scopes for services are:

  • Singleton – always return same instance.
  • Transient – return new instance every time.
  • Scoped – return same instance in current scope (it’s like singleton in current scope – think about requst scope by example).
  • Instance – specific instance is returned every time and it’s up to you how it is actually ceated.
  • Services registered during application start-up are available to all classes invoked through dependency injection.


Although we can inject services to whatever classes you need there are some things made very convenient for us. Let’s see now how injection works with controllers and views.

Injecting services to controller

We don’t need custom controller factories anymore if we don’t use some other dependency injection container. Also we don’t have to dig around in system variables and classes to find settings we need. We can do it all through dependency injection. Here is the example how to provide environment information and some custom services to controller.

public class HomeController : Controller
{
    private readonly IApplicationEnvironment _appEnvironment;
    private readonly ShopContext _shopContext;
    private readonly IProductService _productService;
 
    public HomeController(ShopContext shopContext,
                          IProductService productService,
                          IApplicationEnvironment appEnvironment)
    {
        _appEnvironment = appEnvironment;
        _shopContext = shopContext;
        _productService = productService;
    }
 
    public IActionResult Index()
    {
        return View();
    }

The code here uses controller injection – the only injecton mode supported by ASP.NET right now. We don’t have to do anything special for dependency injection to happen. We just make sure we register our custom services at application startup.

 

Injecting services to views

It’s also possible now to inject services to views. There’s new syntax for this.

@model ProductCategoryMenuModel
@inject ShopContext ShopContext

<h1>@ShopContext.PageTitle</h1>
 
<ul>
    <!-- write out categories here -->
</ul>

tells to view engine that we want instance of ShopContext to be injected to view and we name it as ShopContext. Perhaps it’s not a good practice to name variable as type in view but still it communicates the purpose of variable well.

Conclusion

Framework level dependency injection in ASP.NET 5 is very transparent and configuration is simple. First register type mappings in application start-up and then we use constructor injection to get instances to our classes. This way we can use classes by interfaces and we don’t have to create instances in our own code. On MVC side we can use dependency injection for controller, views and view components.

 

HostForLIFE.eu ASP.NET 5 Hosting
HostForLIFE.eu revolutionized hosting with Plesk Control Panel, a Web-based interface that provides customers with 24x7 access to their server and site configuration tools. Plesk completes requests in seconds. It is included free with each hosting account. Renowned for its comprehensive functionality - beyond other hosting control panels - and ease of use, Plesk Control Panel is available only to HostForLIFE's customers. They
offer a highly redundant, carrier-class architecture, designed around the needs of shared hosting customers.



HostForLIFE.eu Proudly Launches ASP.NET 5 Hosting

clock December 8, 2014 10:10 by author Peter

European leading web hosting provider, HostForLIFE.eu announces the launch of ASP.NET 5  support on the recently released Windows Server 2012.

HostForLIFE.eu was established to cater to an under served market in the hosting industry; web hosting for customers who want excellent service. HostForLIFE.eu – a cheap, constant uptime, excellent customer service, quality, and also reliable hosting provider in advanced Windows and ASP.NET technology. HostForLIFE.eu proudly announces the availability of the ASP.NET 5 hosting in our entire servers environment.

ASP.NET is Microsoft's dynamic website technology, enabling developers to create data-driven websites using the .NET platform and the latest version is 5 with lots of awesome features. ASP.NET 5 is a lean .NET stack for building modern web apps. Microsoft built it from the ground up to provide an optimized development framework for apps that are either deployed to the cloud or run on-premises. It consists of modular components with minimal overhead.

According to Microsoft officials, much of the functionality in the ASP.NET 5 release is a new flexible and cross-platform runtime, a new modular HTTP request pipeline, Cloud-ready environment configuration, Unified programming model that combines MVC, Web API, and Web Pages, Ability to see changes without re-building the project, etc.

HostForLIFE.eu hosts its servers in top class data centers that is located in Amsterdam (NL), London (UK), Paris (FR) and Seattle (US) to guarantee 99.9% network uptime. All data center feature redundancies in network connectivity, power, HVAC, security, and fire suppression. All hosting plans from HostForLIFE.eu include 24×7 support and 30 days money back guarantee. The customers can start hosting our ASP.NET 5 site on our environment from as just low €3.00/month only.

HostForLIFE.eu is a popular online ASP.NET  based hosting service provider catering to those people who face such issues. The company has managed to build a strong client base in a very short period of time. It is known for offering ultra-fast, fully-managed and secured services in the competitive market.

HostForLIFE.eu offers the latest European ASP.NET 5 hosting installation to all our new and existing customers. The customers can simply deploy our ASP.NET 5 website via our world-class Control Panel or conventional FTP tool. HostForLIFE.eu is happy to be offering the most up to date Microsoft services and always had a great appreciation for the products that Microsoft offers.

Further information and the full range of features ASP.NET 5 Hosting can be viewed here http://www.hostforlife.eu

About Company
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. HostForLIFE.eu deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.

HostForLIFE.eu is awarded Top No#1 SPOTLIGHT Recommended Hosting Partner by Microsoft (see http://www.asp.net/hosting/hostingprovider/details/953). Their service is ranked the highest top #1 spot in several European countries, such as: Germany, Italy, Netherlands, France, Belgium, United Kingdom, Sweden, Finland, Switzerland and other European countries. Besides this award, we have also won several awards from reputable organizations in the hosting industry and the detail can be found on our official website.



About HostForLIFE.eu

HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.

We have offered the latest Windows 2016 Hosting, ASP.NET Core 2.2.1 Hosting, ASP.NET MVC 6 Hosting and SQL 2017 Hosting.


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