net6内置IOC容器使用

1、创建控制台应用程序

2、Nuget引用Microsoft.Extensions.DependencyInjection

3、创建Business.IServices类库

创建接口IPower、IMicrophone.cs、IHeadphone

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace Business.IServices
 8 {
 9     public interface IPower
10     {
11     }
12 }
View Code
1 namespace Business.IServices
2 {
3     public interface IMicrophone
4     {
5        
6     }
7 }
View Code
1 namespace Business.IServices
2 {
3     public  interface IHeadphone
4     {
5     }
6 }
View Code

 

4、创建Business.Services类库

创建类Power继承 IPower，Microphone继承IMicrophone，Headphone继承

 1 using Business.IServices;
 2 
 3 namespace Business.Services
 4 {
 5     public class Power :IPower
 6     {
 7         public Power(IMicrophone microphone)
 8         {
 9             Console.WriteLine($"{this.GetType().Name}被构造了");
10         }
11     }
12 }
View Code
 1 using Business.IServices;
 2 
 3 namespace Business.Services
 4 {
 5     public class Microphone : IMicrophone
 6     {
 7         public Microphone()
 8         {
 9             Console.WriteLine($"{this.GetType().Name}被构造..");
10         }
11     }
12 }
View Code
 1 using Business.IServices;
 2 
 3 namespace Business.Services
 4 {
 5     public class Headphone : IHeadphone
 6     {
 7         public Headphone(IPower power)
 8         {
 9             Console.WriteLine($"{this.GetType().Name}被构造...");
10         }
11     }
12 }
View Code

5、修改Program.cs

 1 using Business.IServices;
 2 using Business.Services;
 3 using Microsoft.Extensions.DependencyInjection;
 4 
 5 {
 6     //1、创建容器
 7     ServiceCollection serviceDescriptors = new ServiceCollection();
 8     //2、注册抽象和具体普通类之间的关系
 9     serviceDescriptors.AddTransient<IPower, Power>();
10     serviceDescriptors.AddTransient<IMicrophone, Microphone>();
11     serviceDescriptors.AddTransient<IHeadphone, Headphone>();
12     //3、serviceDescriptions.builder
13     ServiceProvider serviceProvider = serviceDescriptors.BuildServiceProvider();
14 
15    //创建实例
16     IHeadphone headphone = serviceProvider.GetService<IHeadphone>();
17 }
View Code

 

6、文件结构

 

 

7、启动调试

可以发现程序会依次执行Microphone、Power、Headphone的构造函数，然后创建Headphone实例

这是控制反转的构造函数注入，但一个实例需要被创建时，它的构造函数需要的参数实例会一层层追溯，然后创建构造函数参数需要的实例。

 

posted @ 2022-05-14 22:48  ziff123  阅读(744)  评论(0)  编辑  收藏  举报