将片段从C＃转换为C ++ / CLI [英] Tranlating a snippet from C# to C++/CLI

问题描述

我想将此代码段从c＃转换为C ++ / CLI，但我甚至不确定它是什么：

I want to translate this snippet to C++/CLI from c#, but I'm not even sure what it is:

private PrintDocument document = new PrintDocument();
    document.PrintPage += new PrintPageEventHandler(PrintPage);

到目前为止，这是我所做的，但我想我需要另一个参数：

So far this is what I've made of it, but I think I need another parameter:

PrintDocument^ m_document;
m_document->PrintPage += gcnew PrintPageEventHandler(PrintPage);

推荐答案

我将在编译的基础上尝试这个 - 证明将在运行时出现！< br $>

I'm going try this on the basis that it compiles - the proof will come at run time!

m_document->PrintPage += gcnew PrintPageEventHandler(this, PrintPage);

这只是声明一个名为'document'的变量，类型为PrintDocument，并使用默认构造函数初始化它。

然后它为其PrintPage事件设置一个事件处理程序，该事件是指向应该在类中某处声明的PrintPage（）方法的委托。



如何不幸的是，我不知道在C ++ / CLI中将事件连接到委托方法。抱歉。我不确定您是否遇到C＃或C ++ / CLI部分的问题。

This just declares a variable named 'document' of type PrintDocument, and initializes it with default constructor.
Then it sets up an event handler for its PrintPage event, which is a delegate pointing to a PrintPage() method that should be declared somewhere in the class.

How to wire up an event to a delegate method in C++/CLI is out of my knowledge, unfortunately. Sorry. I was not sure if you had problems with the C# or the C++/CLI part.

更改

Change

PrintDocument^ m_document;
m_document->PrintPage += gcnew PrintPageEventHandler(PrintPage);

to

to

PrintDocument^ m_document;
m_document->PrintPage += gcnew PrintPageEventHandler(&PrintPage);

这篇关于将片段从C＃转换为C ++ / CLI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！