为何使用活动？ [英] Why use Events?

问题描述

创建自己的活动有什么理由？为什么不直接打电话给一个班级

方法/功能？


谢谢，

Brett

解决方案

因为必须显式调用方法或函数。当应用程序中的某些内容本身发生时，或者由于某个错误条件或触发的计时器事件而导致某种情况发生时，甚至会发生
。 。

另外，考虑一段控制另一段代码（B）的代码（A）。

B如何通知A发生了什么事。它没有概念

创造它，因此无法激发沟通。


" Brett" < [e-mail]>在消息中写道

新闻：我们************** @ TK2MSFTNGP09.phx.gbl ...

创建的理由是什么你自己的活动？为什么不直接调用一个类
方法/函数呢？

谢谢，
Brett

我通常会使用它们。


事件是为了暗示。


一个对象暗示某个事件的类。


你不能通过常规方法调用已经实例化的类的方法来自对象内的对象。

在这种情况下事件帮助和make生活轻松。


HTH

rawCoder


" Brett" < [e-mail]>在消息中写道

新闻：我们************** @ TK2MSFTNGP09.phx.gbl ...

创建的理由是什么你自己的活动？为什么不直接调用一个类
方法/函数呢？

谢谢，
Brett

" rawCoder" < RA ****** @ hotmail.com>在留言中写道

新闻：％2 *************** @ TK2MSFTNGP14.phx.gbl ...

我的方式通常使用它们。

事件是为了暗示。

一个Object为一些事件暗示一个类。

你不能通过常规手段调用一个方法已从对象内实例化对象的类。


你能在这里展示你的意思的代码示例吗？

事件在这种情况下有所帮助，让生活变得轻松。

HTH
rawCoder

Brett < [e-mail]>在消息中写道
新闻：我们************** @ TK2MSFTNGP09.phx.gbl ...

创建自己的活动有什么理由？为什么不直接调用一个类
方法/函数呢？

谢谢，
Brett

What are reasons to create your own events? Why not just call a class
method/function instead?

Thanks,
Brett

解决方案

Because a method or function has to be explicitly called. An even occurs
when something within the application happens by itself, or as a result of
something, like an error condition, or a timer event being fired. .
Also, consider a piece of code (A) that controls another piece of code(B).
How would B notify A that something has happened. It has no concept of what
has created it, and therefore cannot instigate the communication.

"Brett" <[e-mail]> wrote in message
news:us**************@TK2MSFTNGP09.phx.gbl...

What are reasons to create your own events? Why not just call a class
method/function instead?

Thanks,
Brett

The way I use them ususally.

Events are for intimation.

An Object intimating a class for some event.

You cant by regular means call a method of the class that has instantiated
the object from within the object.
Events help in this case and make life easy.

HTH
rawCoder

"Brett" <[e-mail]> wrote in message
news:us**************@TK2MSFTNGP09.phx.gbl...

What are reasons to create your own events? Why not just call a class
method/function instead?

Thanks,
Brett

"rawCoder" <ra******@hotmail.com> wrote in message
news:%2***************@TK2MSFTNGP14.phx.gbl...

The way I use them ususally.

Events are for intimation.

An Object intimating a class for some event.

You cant by regular means call a method of the class that has instantiated
the object from within the object.
Can you show a code example of what you mean here?
Events help in this case and make life easy.

HTH
rawCoder

"Brett" <[e-mail]> wrote in message
news:us**************@TK2MSFTNGP09.phx.gbl...

What are reasons to create your own events? Why not just call a class
method/function instead?

Thanks,
Brett

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