using Microsoft.Practices.Unity;
using Microsoft.Practices.Unity.Configuration;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace UnityIocTest
{
 /// <summary>
 /// Unity IOC单例模式 
 /// </summary>
 public class UnitySingleton
 {
  //单例
  private static UnitySingleton instance;

  //ioc容器
  public IUnityContainer container;

  //获取单例
  public static UnitySingleton getInstance()
  {
   if (instance == null || instance.container == null)
   {
    string configFile = "Unity.config";
    var fileMap = new ExeConfigurationFileMap { ExeConfigFilename = configFile };
    //从config文件中读取配置信息
    Configuration configuration = ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None);
    //获取指定名称的配置节
    UnityConfigurationSection section = (UnityConfigurationSection)configuration.GetSection("unity");
    instance = new UnitySingleton()
    {
     //container = new UnityContainer().LoadConfiguration((UnityConfigurationSection)ConfigurationManager.GetSection("unity"), "MyContainer")
     container = new UnityContainer().LoadConfiguration(section, "MyContainer")
     //container = new UnityContainer()
    };
    //instance.container.RegisterType<IExampleClass, ExampleClass>();
   }
   return instance;
  }

  //IOC注入实体
  public static T GetInstanceDAL<T>()
  {
   return getInstance().container.Resolve<T>();
  }
 }
}