为什么要派代表? [英] Why Delegates?

问题描述

我断断续续地工作了三年，但是我无法确定为什么委托有用.暂时忽略事件，甚至可能忽略向委托添加多个方法的功能(前提是它们都具有相同的签名)，为什么要编写代码:

Off and on for three years, I''ve tried and tried, but I cannot wrap my head around why a delegate is useful. Ignoring Events for the moment, and possibly even the ability to add multiple methods to a delegate (provided they all have the same signature), why would you code:

public delegate void SomeDelegate(int x);
SomeDelegate sd = SomeDelegate(SomeMethod);
sd(24);

代替:

Instead of:

SomeMethod(24);

我不明白我已经读过文章，书籍，而且我一定会错过一些相关的内容，因为这似乎浪费了很多代码.

提前谢谢！

副标题和文字，代码块固定. -OriginalGriff [/edit]

I don''t get it. I''ve read articles, books, and I must be missing something relevant because it seems like an awful waste of code.

Thanks in advance!

[edit]Shouty title and text, code block fixed. - OriginalGriff[/edit]

推荐答案

我写了一个技巧/窍门，说明使用与事件无关的委托的一种方法. >
代表很好，对你也很好 [ ^ ]

您还可以使用委托与其他线程的UI线程进行通信.

I wrote a tip/trick about one way to use delegates that doesn''t have anything to do with events.

Delegates Are Good, and Good For You[^]

You also use delegates to communicate with the UI thread from other threads.

我鼓励您阅读以下文章:

http://www.codeproject.com/KB/cs/delegatespart1.aspx [ ^ ]

http://www.codeproject.com/KB/cs/delegatespart2 [ http://www.codeproject.com/KB/cs/delegatespart3 [ http://www.codeproject.com/KB/cs/delegatespart4 [ http://www.codeproject.com/KB/cs/delegatespart5 [

Well I encourage you to read the following articles:

http://www.codeproject.com/KB/cs/delegatespart1.aspx[^]

http://www.codeproject.com/KB/cs/delegatespart2[^]

http://www.codeproject.com/KB/cs/delegatespart3[^]

http://www.codeproject.com/KB/cs/delegatespart4[^]
http://www.codeproject.com/KB/cs/delegatespart5[^]

我的回答-我们为什么需要函数的指针"?

My answer - "why do we need pointers to functions"?

这篇关于为什么要派代表?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！