22. Delegates

最新推荐文章于 2025-08-12 16:00:16 发布

masterall

最新推荐文章于 2025-08-12 16:00:16 发布

阅读量715

点赞数

CC 4.0 BY-SA版权

分类专栏： c#/c++ 文章标签： delegates methods pointers pascal c++ function

本文链接：https://blog.youkuaiyun.com/masterall/article/details/819846

c#/c++ 专栏收录该内容

333 篇文章

订阅专栏

本文介绍了C#中委托的概念及其工作原理。委托允许程序员创建指向方法的引用，并且能够调用这些方法，这为实现回调和事件处理等功能提供了基础。文章强调了委托与C++等语言中的函数指针的不同之处，同时展示了其在匿名调用方面的灵活性。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

[Note: Delegates enable scenarios that other languages?such as C++, Pascal,
and Modula?have addressed with
function pointers. Unlike C++ function pointers, however, delegates are
fully object oriented, and unlike
C++ pointers to member functions, delegates encapsulate both an object
instance and a method. end note]
A delegate declaration defines a class that is derived from the class
System.Delegate. A delegate instance
encapsulates one or more methods, each of which is referred to as a
callable entity. For instance methods, a
callable entity consists of an instance and a method on that instance. For
static methods, a callable entity consists
of just a method. Given a delegate instance and an appropriate set of
arguments, one can invoke all of that
delegate instance?s methods with that set of arguments.
[Note: An interesting and useful property of a delegate instance is that it
does not know or care about the classes
of the methods it encapsulates; all that matters is that those methods be
compatible (§22.1) with the delegate?s
type. This makes delegates perfectly suited for ?anonymous? invocation. end
note]