class diagram：
1：imethodinject：interface，拥有executeing，exceptioned，executesuccess三个契约为别为执行前，异常，成功。它们都有公同的参数类型：methodexecutioneventargs
executeing：返回值为bool类型，将决定是否继续执行方法体。exceptioned：属性eeption代表发生的异常信息，返回值exceptionstrategy（取值：handle, rethrow, thrownew）决定异常处理机制，handle已处理并忽略，rethrow重新抛出，thrownew抛出一个包装后的来源于methodexecutioneventargs 的exception。executesuccess，对于拥有返回值的方法，可以修改methodexecutioneventargs 的returnvalue，修改返回值。最后methodexecutioneventargs的order决定多个attribute的注入先后，即方法截获的先后顺序。
1：methodinterceptbase：针对于方法attribute标签，实现方法截获
[attributeusage(attributetargets.method, inherited = false, allowmultiple = false)]
public class methodinterceptbase : attribute, imethodinject
{
public int order
{
get;
set;
}
#region imethodinject members
public virtual bool executeing(methodexecutioneventargs args)
return true;
public virtual exceptionstrategy exceptioned(methodexecutioneventargs args)
return exceptionstrategy.rethrow;
public virtual void executesuccess(methodexecutioneventargs args)
#endregion
}
2：matchedmethodinterceptbase：和上面方法之上的methodinterceptbase大体一致，区别在于其应用于class之上，属性rule为截获方法匹配（应用于多个方法之上相同截获），支持*匹配。
[attributeusage(attributetargets.class, inherited = false, allowmultiple = false)]
public class matchedmethodinterceptbase : attribute, imethodinject
public string rule
}
3：propertyinterceptbase：实现属性的注入，其属性action（enum propertyinterceptaction：none get, set）指注入属性的get或者set；
[attributeusage(attributetargets.property, inherited = false, allowmultiple = false)]
public class propertyinterceptbase : attribute, imethodinject
public propertyinterceptaction action
其上默认都是executeing继续执行，exceptioned为抛出不处理，成功不修改result。
下面是一个简单测试code：
using system;
using system.collections.generic;
using system.linq;
using system.text;
using system.reflection;
using green.aop;
namespace test
{
// [testaop2attribute(rule = "testmethod1*")]
public class class1
// [testaoppropertyattribute(action = propertyinterceptaction.set)]
[testaoppropertygetattribute(action = propertyinterceptaction.get)]
public teststrust testproperty
[obsolete()]
public static void main(string[] args)
{
try
{
var y = new class1();
// y.testproperty = datetime.now;
console.writeline(y.testproperty);
}
catch (exception ex)
console.writeline(ex.tostring());
// new class1().testmethod1(1, 2, null);
console.read();
//throw new exception("exfffffffffffffffffffff");
//[testaopattribute(order=1)]
//[testaop1attribute(testproperty = 1, template = "sdsdsd",order=0)]
public class1 testmethod1(int i, int j, class1 c)
console.writeline("ok");
return new class1();
public class testaoppropertygetattribute : green.aop.propertyinterceptbase
public override bool executeing(green.aop.methodexecutioneventargs args)
console.writeline("------------------" + args);
console.writeline(args.instance);
console.writeline(args.method);
console.writeline(this.gettype() + ":" + "executeing");
public override green.aop.exceptionstrategy exceptioned(green.aop.methodexecutioneventargs args)
console.writeline(this.gettype() + ":" + "exceptioned");
return green.aop.exceptionstrategy.rethrow;
public override void executesuccess(green.aop.methodexecutioneventargs args)
console.writeline("-----------");
console.writeline(this.gettype() + ":" + "executesuccess" + "--result:" + args.returnvalue);
public class testaoppropertyattribute : green.aop.propertyinterceptbase
return green.aop.exceptionstrategy.handle;
{
console.writeline(this.gettype() + ":" + "executesuccess");
public class testaop2attribute : green.aop.matchedmethodinterceptbase
public bool match(system.reflection.methodbase method)
//[attributeusage(attributetargets.method)]
public class testaopattribute : green.aop.methodinterceptbase
[attributeusage(attributetargets.method)]
public class testaop1attribute : attribute, green.aop.imethodinject
public int testproperty
public string template
public bool executeing(green.aop.methodexecutioneventargs args)
public green.aop.exceptionstrategy exceptioned(green.aop.methodexecutioneventargs args)
public void executesuccess(green.aop.methodexecutioneventargs args)
注意测试有两种方式（由于没有安装包）：
1：先重编译测试项目，运行consoleapplication2（在属性中修改控制台其实参数）。在查看测试项目。
在后续将会从简单demo分析实现原理。