there unity It means to complete dependency injection unity Not the game engine .

The original project completion dependency injection is spring.net, however spring.net It's been a long time since people maintained , So Microsoft officially launched Unity Become a substitute for spring.net One of the best candidates for .

Simple console demo:

First, create a new console application ,nuget Search for unity And install .

using System;
using Unity;
using Unity.Attributes; namespace ConsoleApp1
{
public class Index
{ [Dependency]
public virtual IUserService UserService { set; get; } public static void Main(string[] args)
{
var container = new UnityContainer();
container.RegisterType<IUserService, UserService>(); // register
IUserService userService = container.Resolve<IUserService>(); // obtain
userService.Hello();
}
} public interface IUserService
{
void Hello();
} class UserService : IUserService
{
public void Hello()
{
Console.WriteLine("hello");
}
}
}

stay asp.net mvc Use in unity:

1、 newly build asp.net mvc application ,nuget install unity.mvc

2、 The new library BLL、IBLL, After completion, the contents are as follows :

3、BLL newly build UserService,IBLL newly build IUserService, Realization Hello Method

namespace IBLL
{
public interface IUserService
{
string Hello();
} }
using IBLL;
namespace BLL
{
public class UserService:IUserService
{
public string Hello()
{
return "hello";
}
}
}

4: stay Global.asax.cs Fill in the configuration . Examples are as follows :

using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
using BLL;
using IBLL;
using Unity;
using Unity.AspNet.Mvc; namespace WebApp
{
public class MvcApplication : System.Web.HttpApplication
{
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles); var container = BuildUnityContainer(); // Customize BuildUnityContainer Method , Get the container
DependencyResolver.SetResolver(new UnityDependencyResolver(container)); } IUnityContainer BuildUnityContainer()
{
UnityContainer container = new UnityContainer();
container.RegisterType<IUserService, UserService>();return container;
}
}
}

5、 stay Control gain UserService Class and use

using System.Web.Mvc;
using IBLL; namespace WebApp.Controllers
{
public class HomeController : Controller
{
private IUserService UserService;public HomeController(IUserService userService)
{
this.UserService = userService; // Use constructor Injection
} public ActionResult Index()
{
string str = UserService.Hello();
return Content(str);
} }
}

And that's the simplest of all mvc demo.

Other things like using configuration files 、 Use other methods to inject and other detailed operations , You can refer to this post :https://www.cnblogs.com/qqlin/archive/2012/10/18/2720828.html

unity Official documents :https://msdn.microsoft.com/en-us/library/ff649564.aspx

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