C# 利用Unity 实现IOC+AOP

  public interface INoticy
{
void Noticy(string msg);
}
public class SMSNoticy : INoticy
{
public void Noticy(string msg)
{
Console.WriteLine(msg);
}
}
public class Alarm
{
[Dependency]
public INoticy Noticy { get; set; }
public void TriggerAlarm()
{
Noticy.Noticy("test");
}
}
public class ComponentInterceptor : IInterceptionBehavior
{
public bool WillExecute
{
get
{
return true;
}
} public IEnumerable<Type> GetRequiredInterfaces()
{
return Type.EmptyTypes;
} public IMethodReturn Invoke(IMethodInvocation input, GetNextInterceptionBehaviorDelegate getNext)
{
Console.WriteLine("Before the call");
var result = getNext()(input, getNext); Console.WriteLine("After the call"); return result;
}
}
public class TestMain
{
public void test()
{
var container = new UnityContainer();
container.AddNewExtension<Interception>();
var interceptor = new Interceptor<InterfaceInterceptor>();
var interceptionBehavior = new InterceptionBehavior<ComponentInterceptor>(); container.RegisterType<INoticy, SMSNoticy>( interceptor, interceptionBehavior);
container.RegisterSingleton<Alarm>();
var alarm = container.Resolve<Alarm>();
alarm.TriggerAlarm(); }
}

依赖注入最常见的有,构造函数注入,属性注入,接口注入

大型项目比较通用的做法是,将需要注入的内容,放在config中,让程序自动加载注入

在需要使用的地方,直接resolve想要的对象就行,大型项目通过IoC实现各种new对象的操作,IoC最底层是通过activator.createinstance 实现

依赖注入并不需要项目引用DLL,只用保证生成的目录中有DLL就行

附带一例 配置实现的例子

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Unity.Configuration" />
</configSections>
<unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
<sectionExtension type="Microsoft.Practices.Unity.InterceptionExtension.Configuration.InterceptionConfigurationExtension, Unity.Interception.Configuration"/>
<alias alias="INoticy" type="ClassLibrary1.INoticy, ClassLibrary1"/>
<alias alias="SMSNoticy" type="ClassLibrary2.SMSNoticy, ClassLibrary2"/>
<!--<alias alias="SMSNoticy1" type="ClassLibrary2.SMSNoticy1, ClassLibrary2"/>-->
<alias alias="IAlarm" type="ClassLibrary1.IAlarm, ClassLibrary1"/>
<alias alias="Alarm" type="ClassLibrary3.Alarm, ClassLibrary3"/>
<alias alias="Alarm" type="ClassLibrary3.Alarm, ClassLibrary3"/>
<alias alias="ComponentInterceptor" type="WindowsFormsApplication1.ComponentInterceptor, WindowsFormsApplication1"/>
<container name= "SMS">
<extension type="Interception" />
<register type= "INoticy" mapTo= "SMSNoticy"/>
<register type= "IAlarm" mapTo= "Alarm">
<interceptor type="InterfaceInterceptor"/>
<interceptionBehavior name="ComponentInterceptor" type="ComponentInterceptor" />
</register>
</container>
</unity>
</configuration>
public void test()
{
var container = new UnityContainer(); var fileMap = new ExeConfigurationFileMap { ExeConfigFilename = "unity.config" }; //"Config/unity.config"
var configuration =
ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None); var unitySection = (UnityConfigurationSection)configuration.GetSection("unity");
container.LoadConfiguration(unitySection,"SMS"); var alarm = container.Resolve<IAlarm>();
alarm.TriggerAlarm();
}
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