Getting Values From a Method In A Form Into Another Form

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

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

C#

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:

C#

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??

TIA

Posted 16-Nov-11 21:58pm

arashmobileboy

Updated 16-Nov-11 22:05pm

v3

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LanFanNinja 17-Nov-11 4:40am

Check my solution below.

2 solutions

Solution 1

I think you need to go back to basics! :laugh:
You do not want to do this:

Form1 form1 = new Form1();

As the new keyword suggests, it creates a new instance of Form1 rather than accessing the existing, displayed version which has the filled-in textBox. You need to access the existing version which is curently displayed, ort you will not be able to get at it's textbox content!

It's a bit like you putting your phone into the glove box of your car, then being surprised when you look in the glove box of my car to find it isn't there!

Posted 16-Nov-11 22:04pm

OriginalGriff

Comments

arashmobileboy 17-Nov-11 4:07am

thanks,so how should i access to current value of textbox?

OriginalGriff 17-Nov-11 4:28am

Via the instance of Form1 that you typed into!
I can't tell you exactly what to do - I don't have your code. But, at some point you opened Form2 (presumably from Form1)...

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LanFanNinja · Accepted Answer · 2011-11-16T22:29:00

Solution 2

Check out my solution here(solution 2) Need data back in form1 Textbox1 while coming back from form2[^] for an easy way of doing this.

Posted 16-Nov-11 22:29pm

LanFanNinja