autofac JSON文件配置

 

autofac是比较简单易用的ioc容器。下面我们展示如何通过json配置文件，来进行控制反转。

需要用到以下程序集。可以通过nugget分别安装

microsoft.extensions.configuration.dll

microsoft.extensions.configuration.json

 autofac.configuration.dll

 

注意，项目目标框架最好设置为.net framework 4.6.1及以上。因为microsoft.extensions.configuration.dll，依赖.netstandard2.0 

 下表列出了 .net standard 的所有版本及其支持的平台

 

autofacext帮助类

using autofac;
using autofac.configuration;
using microsoft.extensions.configuration;

namespace autofacconsole
{
    public static class autofacext
    {
        private static icontainer _container;

        public static void initautofac()
        {

            // 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);


            // set the dependency resolver to be autofac.
            _container = builder.build();

        }

        /// <summary>
        /// 从容器中获取对象
        /// </summary>
        /// <typeparam name="t"></typeparam>
        public static t getfromfac<t>()
        {
            return _container.resolve<t>();
            //   return (t)dependencyresolver.current.getservice(typeof(t));
        }

        public static t getfromfac<t>(string name)
        {
            return _container.resolvenamed<t>(name);
        }
    }
}

 客户端调用

public interface ioutput
    {
        void write(string content);
    }

public class consoleoutput : ioutput
    {
        public void write(string content)
        {
            console.writeline(content);
        }
    }

class program
    {        
        static void main(string[] args)
        {
           autofacext.initautofac();
            var writer =autofacext.getfromfac<ioutput>();
            writer.writedate();
            console.readkey();
        }
    }    

 

 json配置文件配置

autofac.json 

{
  "defaultassembly": "autofacconsole",
  "components": [
    {
      "type": "autofacconsole.consoleoutput, autofacconsole",
      "services": [
        {
          "type": "autofacconsole.ioutput,autofacconsole"
        }
      ],
      "instancescope": "single-instance",
      "injectproperties": true
    }
  ]
}

设置为如果较新则复制

 

参考资料：

https://github.com/autofac/autofac

https://autofac.readthedocs.io/en/latest/getting-started/index.html

https://autofac.readthedocs.io/en/latest/configuration/xml.html