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Question

I've already searched other questions for this answer (and that is how I got as far as I did) and everything seems to be working except the end result. I am getting no errors but I am not getting the desired input and cannot figure out why.

I have two forms, Form1 and login. On Form1 I have a label called "label2" that is going to display text entered from a textbox on login upon button press. Here is the code I have so far:

Form1 Code:

    public void SetTextForLabel(string myText)
    {
        this.label2.Text = myText;
    }

login Code:

    private void button1_Click(object sender, EventArgs e)
    {
        Form1.userName = textBox1.Text;
        Form1.password = textBox2.Text;

        Form1 frm = new Form1();
        frm.SetTextForLabel(textBox1.Text);

        this.Close();
    }

The program works. I click login on form1, it opens up the login form. I enter my username and password and it passes the input to my form1 variables. Since label2 on form1 is not public, I made a public method to use on my login form that will change my label2.Text, but it doesn't and I'm not sure why. Any help would be appreciated.

Answer 1

Judging from your description, I believe Form1 opens Login form, and on login form there is button1 that is probably your login button.

If this is all correct then I think you have your logic wrong.

your button on Form1 that opens login form should do the following

using(Login loginForm = new Login())
{
     if(DialogResult.OK == loginForm.ShowDialog())
     {
         SetTextForLabel(loginForm.TextAccessorProperty);
     }
     else
     {
          MessageBox.Show("Invalid login");
     }
}

then login forms button one should just do,

//Login logic
this.DialogResult = DialogResult.OK;
// (no need for form.close())

Answer 2

This creates a new instance of Form1 but it's not shown, and I suspect this is not the reference you need.

    Form1 frm = new Form1();
    frm.SetTextForLabel(textBox1.Text);

Answer 3

Your code works fine for me, Just write one more line to show form1.

ie

frm.Show();

I think it will work. :)