控制反转(IOC: Inverse Of Control) & 依赖注入（DI: Independence Inject）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCTesting
{
interface IElectricity
{
string ProvideElectricity();
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCTesting
{
class ElectricityFactory:IElectricity
{
public string ProvideElectricity()
{
return "The electricity is coming!";
}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCTesting
{
interface IWater
{
string ProvideWater();
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCTesting
{
class WaterFactory:IWater
{
public string ProvideWater()
{
return "The water is coming!";
}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCTesting
{
public interface People
{
string UsingWater();
string UsingElectricity();
}
}

using Microsoft.Practices.Unity;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCTesting
{
#region 构造器注入
class ResidentsA:People
{
WaterFactory _wf;
ElectricityFactory _ef;
public ResidentsA(WaterFactory wf,ElectricityFactory ef)
{
this._ef = ef;
this._wf = wf;
}
public string UsingWater()
{
Console.WriteLine("I want to drink!");
return _wf.ProvideWater();
} public string UsingElectricity()
{
Console.WriteLine("I want to cook some food!");
return _ef.ProvideElectricity();
}
}
#endregion #region 属性注入
class ResidentsB : People
{
//属性注入
[Dependency]
public IWater _w { set; get; }
[Dependency]
public IElectricity _e { set; get; } public string UsingWater()
{
Console.WriteLine("I want to drink!");
return _w.ProvideWater();
} public string UsingElectricity()
{
Console.WriteLine("I want to cook some food!");
return _e.ProvideElectricity();
}
}
#endregion #region 依赖方法注入
class Residents : People
{
public IWater _iw;
public IElectricity _ie; public string UsingWater()
{
Console.WriteLine("I want to drink!");
return _iw.ProvideWater();
} public string UsingElectricity()
{
Console.WriteLine("I want to cook some food!");
return _ie.ProvideElectricity();
} [InjectionMethod]
public void UsingWaterTest(IWater iw)
{
Console.WriteLine("I want to drink!");
this._iw = iw;
} [InjectionMethod]
public void UsingElectricityTest(IElectricity ie)
{
Console.WriteLine("I want to cook some food!");
this._ie = ie;
}
}
#endregion
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection,Microsoft.Practices.Unity.Configuration"/>
</configSections> <unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
<container>
<!--register type="full class name,namespace"--> <register type="IOCTesting.IWater,IOCTesting" mapTo="IOCTesting.WaterFactory,IOCTesting">
<lifetime type="singleton"/>
</register> <register type="IOCTesting.IElectricity,IOCTesting" mapTo="IOCTesting.ElectricityFactory,IOCTesting">
<lifetime type="singleton"/>
</register> <!--<register type="IOCTesting.People,IOCTesting" mapTo="IOCTesting.ResidentsA,IOCTesting">
<lifetime type="singleton"/>
</register>-->
<!--<register type="IOCTesting.People,IOCTesting" mapTo="IOCTesting.ResidentsB,IOCTesting">
<lifetime type="singleton"/>
</register>-->
<register type="IOCTesting.People,IOCTesting" mapTo="IOCTesting.Residents,IOCTesting">
<lifetime type="singleton"/>
</register>
</container>
</unity>
</configuration>

using Microsoft.Practices.Unity;
using Microsoft.Practices.Unity.Configuration;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace IOCTesting
{
class Program
{
static void Main(string[] args)
{
//配置文件注册
IUnityContainer mycontanier = new UnityContainer();
UnityConfigurationSection section = (UnityConfigurationSection)System.Configuration.ConfigurationManager.GetSection("unity");
section.Configure(mycontanier); //创建调用者
//Console.WriteLine("-------------------Constructor Injection-------------------");
//ResidentsA pa = mycontanier.Resolve<People>() as ResidentsA;
//Console.WriteLine(pa.UsingWater());
//Console.WriteLine(pa.UsingElectricity()); //Console.WriteLine("-------------------Property Injection-------------------");
//ResidentsB pb = mycontanier.Resolve<People>() as ResidentsB;
//Console.WriteLine(pb.UsingWater());
//Console.WriteLine(pb.UsingElectricity()); Console.WriteLine("-------------------Method Injection-------------------");
Residents p = mycontanier.Resolve<People>() as Residents;
Console.WriteLine(p._iw.ProvideWater());
Console.WriteLine(p._ie.ProvideElectricity()); Console.ReadLine();
}
}
}