《.Net框架程序设计》读书笔记 之 委托链
开始没记笔记,以后再补基础
:委托链
委托的Invoke()方法,在委托链上,具有调用一个委托对象之前的委托对象(如果存在)的能力,这样,可以确保委托链上所有的委托对象都得到调用。但它的缺点是:只能取得最后一个调用对象的返回值,而前面调用对象的返回值都会丢失;另外,如果中间有一个委托对象产生异常或阻塞很长的时间,则会阻止其后面所有的委托对象的调用,因为委托链上的对象是按序调用的。
针对此种情况,MulticastDelegate类提供一个实例方法:GetInvocationList(),它返回一个委托形式的数组,从而可以任意调用委托链上的对象。
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