从事件返回一个值 - 有一个良好的实践呢？ [英] Return a value from an Event -- is there a Good Practice for this?

问题描述

我做了使用异步TCP套接字一个小的多线程应用程序，但我会到如此地步：我使用自定义事件来读取一个形式，事件中使用的值，并委托返回完成后的字符串。

I'm doing a small multi-threaded app that uses asynchronous TCP sockets, but I will get to the point: I'm using a custom event to read a value from a form and the delegate used by the event returns a string when finished.

我的问题在这里：是正确的？它是确定从事件的返回值？还是有更好的方法来做到这一点？ （就像使用一个简单的委托的形式读出值）

My question here is: is that correct? is it OK to return values from the events? or is there a better way to do this? (like using a simple delegate to the form to read the values)

推荐答案

这往往尴尬从事件返回值。在实践中，我发现它更容易包括一组传递给事件，然后检查事件触发后定制的EventArgs的可写属性 - 类似于取消的WinForms的FormClosing事件的属性。

It's often awkward to return values from events. In practice, I've found it much easier to include a writable property on a set of custom EventArgs that is passed to the event, and then checked after the event fires -- similar to Cancel property of the WinForms FormClosing event.

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