当我关闭启动表单时，如何防止应用程序终止? [英] How do I prevent the app from terminating when I close the startup form?

问题描述

我的项目中有两个表单:Form1 和 Form2.Form1 中有一个按钮，我想做的是关闭 Form1 并在单击该按钮时显示 Form2.

There is two Forms in my project : Form1 and Form2. There is a button in Form1, and what I want to do is closing Form1 and showing Form2 when that button clicked.

首先，我尝试过

Form2 frm = new Form2();
frm.Show();
this.Close();

但随着 Form1 关闭，Form2 也关闭了.接下来，我尝试了

but as Form1 was closed, Form2 also got closed. Next, I tried

Form2 frm = new Form2();
frm.Show();
this.Hide();

但是有一个缺点，即当 Form2 关闭时应用程序不会退出.因此，我不得不在 Form2 的 form_FormClosing 部分中放入其他源.

but there is a disadvantage that the application does not exit when the Form2 is closed.So, I had to put in additional sources in form_FormClosing section of Form2.

嗯......我想知道这是否是正确的方法......那么，处理这个问题的正确方法是什么?

Hmm.... I wonder whether this is the right way....So, what is the proper way of handling this problem?

推荐答案

Program.cs 中自动生成的代码被编写为在启动窗口关闭时终止应用程序.您需要对其进行调整，使其仅在没有更多窗口时才终止.像这样:

The auto-generated code in Program.cs was written to terminate the application when the startup window is closed. You'll need to tweak it so it only terminates when there are no more windows left. Like this:

    [STAThread]
    static void Main() {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        var main = new Form1();
        main.FormClosed += new FormClosedEventHandler(FormClosed);
        main.Show();
        Application.Run();
    }

    static void FormClosed(object sender, FormClosedEventArgs e) {
        ((Form)sender).FormClosed -= FormClosed;
        if (Application.OpenForms.Count == 0) Application.ExitThread();
        else Application.OpenForms[0].FormClosed += FormClosed;
    }

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