什么是订阅事件的C ++ / CLI语法？ [英] what is the C++/CLI syntax to subscribe for events?

问题描述

我要更新一些旧的托管C ++代码，如下所示：

I'm updating some old Managed C++ code with lines like this:

instanceOfEventSource->add_OnMyEvent( 
    new EventSource::MyEventHandlerDelegate(this, MyEventHandlerMethod) );

其中

• EventSource 是发布事件的类


• instanceOfEventSource li> EventSource :: MyEventHandlerDelegate 是事件的委托类型


• MyEventHandlerMethod 是当前类（其中this是一个实例），签名匹配EventSource :: MyEventHandlerDelegate

• EventSource is the class that publishes events
• instanceOfEventSource is an instance of that class
• EventSource::MyEventHandlerDelegate is the delegate type for the event
• MyEventHandlerMethod is a (non-static) method within the current class (of which "this" is an instance) with the signature matching EventSource::MyEventHandlerDelegate

C ++ / CLI？

What is the right syntax for this in C++/CLI?

推荐答案

语法与C＃类似，换句话说， + = 被重载以使这成为可能：

The syntax is similar to C#'s, in other words, += is overloaded to make this possible:

instanceOfEventSource.MyEvent +=
    gcnew EventSource::MyEventHandlerDelegate(this, &MyClass::MyEventHandlerMethod);

类似删除。然而，与C＃不同，您可能不会省略事件处理程序委托的显式实例化，因此这会产生相当长的代码。

Analogously for removal. Unlike C#, however, you may not omit the explicit instantiation of the event handler delegate so this produces quite long-winded code.

这篇关于什么是订阅事件的C ++ / CLI语法？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！