Question

i have problem with using a method of a form in another form

EDITED:

i coded like this:
(i entered 123 in textbox1)

public class Form1 : Form
{
    private string user_code;

  public string UserCode
    {
        get { return user_code; }
    }

    public bool LoginUser()
    {
   user_code = null;


    if(textBox1.Text=="123"){
          user_code="usercode";
             }
         * 
         */
    }
}

and usage in form2:

          Form1 form1 = new Form1();
          form1.LoginUser();

        MessageBox.Show(form1.UserName);

now output is an empty string,i checked with breakpoint and i saw that when i call loginuser in form2 the value in textbox1 become empty and if condition become false
what do you think about problem??

Answer 1

I solved my problem with this link:

Solution 1 is for ASP.NET, and as I understand it, this is a Windows
Form App. So in that case, the easiest way to do this is to just pass
a reference from form 1 to form 2 like so:

Form 1:

private void button1_Click(object sender, EventArgs e)
{
    Form2 a = new Form2(this);
    a.Show();
    this.Hide();
}

Form 2:

public partial class Form2 : Form
{
    Form1 mainForm;

    public Form2(Form1 mainForm)
    {
        InitializeComponent();

        this.mainForm = mainForm;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        mainForm.Show();
        this.Hide();
    }
}

One more thing in form 2 when calling this.Hide():

The form will still exist in memory it will only be hidden from the
user. If this is what you intended, then that is fine. However, if you
want to dispose of the form 2, call this.Close() instead.