c# - c# - 如何在不关闭应用程序的情况下关闭主窗体？

Question

我想要做什么：
->打开一个MDI表单
->关闭项目主窗体
->不关闭应用程序

我做了什么：

frmMain fm = new frmMain();
fm.Show();
this.Close()

任何帮助，将不胜感激！:)

Answer 1

您可以使用隐藏方法。

尝试这样做：

frmMain fm = new frmMain();
this.Hide();
fm.Show();

或者：

frmMain fm = new frmMain();
this.Hide();
fm.ShowDialog();
this.Show();

后者将打开窗口，一旦关闭，前一个窗口将重新出现。

Answer 2

我为解决这个问题所做的是：

this.Hide()

可能不是最好的方法，但仍然如此。

你甚至可以通过调用来取回它

this.Show()

Answer 3

If you actually wish to close the main form, but leave the application running, you can make your default class launch the application context:

using(MyContext myContext = new MyContext())
{
    Applicaton.Run(myContext);
}

where MyContext inherits from ApplicatonContext.

Your application context can then load and close forms as needed. I do this with one project where I have the context launch a login form. Only after it is completed successfully does the main form get loaded. I also allow the "logging out" from the program to be handled by terminating the main form and reloading the login form.

EDIT: From the comments, it may be that all you are looking for is .Hide(). This doesn't cause your form to unload and a call to .Show() will restore it (for example, you can use a timer or another form holding a reference to your main form to make the call). I prefer to use an ApplicationContext because it takes the responsibility for keeping your program in memory away from a UI element which the user may attempt to close.