打开 FormMain (MDI) 后关闭登录表单

Question

I have a login form linked to database, when the login is successful it opens my FormMain which is a MDI form.

I have this code in my Program.cs:

FormLogin formLogin = new FormLogin();
if (formLogin.ShowDialog() == DialogResult.OK)
{
    Application.Run(new FormMain());
}
else
{
    Application.Exit();
}

What I would like to achieve is, Once the FormMain is opened it should close the login form. At the moment after the main form is opened you can alt tab and go to the login form again. I have tried adding formLogin.Close(); before Application.Run.... without success.

Thank you for your time!

Answer 1

Given the way this is implemented you can hide the login form although it may be possible to close it in another method given the way you currently have it. Another option is to open the main form in a new thread and close the current thread. this will completely close the login page and pass all control to the only active thread. also, please note. if you are using threads then the main form cannot be a child thread