通过配置的方式Autofac 《第三篇》

一、基本配置

　　1、通过配置的方式使用Autofac

　　<?xml version="1.0"?>
　　<configuration>
  　　<configSections>
    　　<section name="autofac" type="Autofac.Configuration.SectionHandler, Autofac.Configuration"/>
  　　</configSections>
  　　<autofac defaultAssembly="ConsoleApplication3">
    　　<components>
      　　<component type="ConsoleApplication3.Worker, ConsoleApplication3" service="ConsoleApplication3.IPerson" />
    　　</components>
  　　</autofac>
　　</configuration>

　　2、通过RegisterModule方式使用配置文件中的信息

    static void Main(string[] args)
    {
        ContainerBuilder builder = new ContainerBuilder();
        builder.RegisterType<AutoFacManager>();
        builder.RegisterModule(new ConfigurationSettingsReader("autofac"));
        using (IContainer container = builder.Build())
        {
            AutoFacManager manager = container.Resolve<AutoFacManager>();
            manager.Say();
        } 
            
        Console.ReadKey();
    }

　　3、通过Register的方式

    builder.RegisterModule(new ConfigurationSettingsReader("autofac"));
    builder.Register(c => new AutoFacManager(c.Resolve<IPerson>()));

 

 

 

 【注意】：在web.config或app.config中配置针对Autofac.Configuration低于4.0才行

 

 

针对4.0及以上版本

官方推荐使用单独json或xml文件配置

http://docs.autofac.org/en/latest/configuration/xml.html#quick-start

JSON格式

{
  "defaultAssembly": "Autofac.Example.Calculator",
  "components": [{
    "type": "Autofac.Example.Calculator.Addition.Add, Autofac.Example.Calculator.Addition",
    "services": [{
      "type": "Autofac.Example.Calculator.Api.IOperation"
    }],
    "injectProperties": true
  }, {
    "type": "Autofac.Example.Calculator.Division.Divide, Autofac.Example.Calculator.Division",
    "services": [{
      "type": "Autofac.Example.Calculator.Api.IOperation"
    }],
    "parameters": {
      "places": 4
    }
  }]
}

xml格式

<?xml version="1.0" encoding="utf-8" ?>
<autofac defaultAssembly="Autofac.Example.Calculator">
    <components name="0">
        <type>Autofac.Example.Calculator.Addition.Add, Autofac.Example.Calculator.Addition</type>
        <services name="0" type="Autofac.Example.Calculator.Api.IOperation" />
        <injectProperties>true</injectProperties>
    </components>
    <components name="1">
        <type>Autofac.Example.Calculator.Division.Divide, Autofac.Example.Calculator.Division</type>
        <services name="0" type="Autofac.Example.Calculator.Api.IOperation" />
        <injectProperties>true</injectProperties>
        <parameters>
            <places>4</places>
        </parameters>
    </components>
</autofac>

使用代码

// Add the configuration to the ConfigurationBuilder.
var config = new ConfigurationBuilder();
config.AddJsonFile("autofac.json");

// Register the ConfigurationModule with Autofac.
var module = new ConfigurationModule(config.Build());
var builder = new ContainerBuilder();
builder.RegisterModule(module);

 这里我遇到一个问题，就是

config.AddJsonFile("autofac.json")

这个方法无法被识别到，后来在网上找到帮助，却是一个类库Microsoft.Extensions.Configuration.Json.dll

添加了这个累计就可以了