如何编写表单中的关闭按钮? [英] How to code the close button in the form?

问题描述

大家好，

我可以问一下是否有人对如何在表单的关闭"按钮中编写代码有想法.

例如，如果用户单击关闭按钮(带有X的红色框)，那么我想显示另一种形式.

谢谢！

Hi Guys,

Can I ask if someone have an idea on how can I write a code in the close button in the form.

Example, if the user click the close button (the red box with X) then another form that i want be show.

Thanks!

推荐答案

我假设您在这里谈论WinForms.如果是这样，则每个窗口都具有与之关联的Closing and Closed事件.我要做的是重写OnClosed实现，并从那里显示我的窗口.

I assume you are talking about WinForms here. If you are, each window has a Closing and Closed event associated with it. What I would do is override the OnClosed implementation and show my window from there.

protected override void OnClosed(EventArgs args)
{
  new NewWindow().Show();
  base.OnClosed(args);
}

从您的角度来看，重要的是，在应用程序退出时不会调用此方法，因此不会使流氓窗口意外打开.

Importantly from your point of view, this method is not called when the application exits, so you won''t get rogue windows opening up unexpectedly.

附加任何所需的内容到表单的 OnClosing [ ^ ]事件.这样，您就不必区分导致表单关闭的原因("X"，Alt + F4，右键单击任务栏，...).

Attach whatever you want to the form''s OnClosing[^] event. That way you don''t have to differentiate what causes the form to close ("X", Alt + F4, right-click on Taskbar, ...).

override void OnClosing()
{
    SomeOtherForm otherForm = new SomeOtherForm(whatever);
    otherForm.Show();
}

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