C ++/CLI Winform中的Lambda表达式 [英] Lambda expression in C++/CLI Winform

问题描述

有人可以告诉我如何在C ++/CLI WinForm中编写以下代码吗?
我搜索了两天，尝试了几次，但没有成功.

Hi,

could somebody tell me how can I write following codes in C++/CLI WinForm?
I''ve searched two days and tried several times, but without success.

private void OnOpenForm2Click(object sender, EventArgs e)
{
   var form2Obj = new Form2();
   form2Obj.Shown += (o, args) => { btnOpenForm2.Enabled = false; };
   form2Obj.FormClosed += (o, args) => { btnOpenForm2.Enabled = true; };
   form2Obj.Show();
}

推荐答案

Lambda表达式在C ++ 11中引入:
http://en.wikipedia.org/wiki/C%2B%2B11#Lambda_functions_and_expressions [ ^ ].

更确切地说，您需要的是匿名方法.请参阅:
http://en.wikipedia.org/wiki/Anonymous_function#C.2B.2B [ ^ ].

如果您的C ++/CLI版本足够新，那么您也可以在C ++/CLI上使用它.

另请参阅本文:
使用Lambda:C ++，C#，C ++/CX和. C ++/CLI [ ^ ].

也请参阅我对这个问题的评论.在最坏的情况下，如果只需要显示的功能或代码，则始终可以定义单独的命名函数FormShownHandler(System::Object, System::EventHandler)和FormClosedHandler(System::Object, System.Windows.Forms::FormClosedEventArgs)而不是匿名方法.

—SA

Lambda expressions are introduced in C++11:
http://en.wikipedia.org/wiki/C%2B%2B11#Lambda_functions_and_expressions[^].

More exactly, what you need is anonymous methods. Please see:
http://en.wikipedia.org/wiki/Anonymous_function#C.2B.2B[^].

If your version of C++/CLI is new enough, you can use it on C++/CLI as well.

Please see also this article:
Using lambdas - C++ vs. C# vs. C++/CX vs. C++/CLI[^].

And also see my comment to the question. In worst case, if you just want the functionality or the code you show, you can always define separate named functions FormShownHandler(System::Object, System::EventHandler) and FormClosedHandler(System::Object, System.Windows.Forms::FormClosedEventArgs) instead of anonymous methods.

—SA

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