Question

I have a Winforms application that starts up with a login screen. If the user’s login credentials are good, this method is called:

public void success()
{
    mainForm index = new mainForm();
    index.Show();
    this.Close();
}

I thought that this would open the mainForm and close the login form, however when I run this, it closes the whole application. Why is that? I’m pretty new to C# and OOP in general, so any tips are appreciated!

I tried doing something like this:
Closing a form and then call another one

But I still got the same result.

Thanks 🙂

Answer 1

Do it like:

static class Program
 {
  /// <summary>
  /// The main entry point for the application.
  /// </summary>
  [STAThread]
  static void Main()
  {   
    using (Login login = new Login())
    {
     login.StartPosition = FormStartPosition.CenterScreen;
     if (login.ShowDialog() == DialogResult.OK)
     {      
      Application.Run(new Form1(login.strUserName)); //passing the userName to the constructor of form1 (see bellow)
     }
   }
  }
 }

//form1:
 public partial class Form1 : Form
 {  
  string userName; 
  public Form1(string _strUser)
  {   
   InitializeComponent();
   userName = _userName; //a local variable of a form1 class has hold user`s name (userName - which u can call it from within the form1 class!
  }
 }