How to get textbox data child form

Question

2.00/5 (1 vote)

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Hi everybody. I have a little problem.
I create two Form:

Form1 = main form MDIParent
Form2 = Child form

Form2 child Form member= textBox111
textBox111.Text= "" emtpy

I call to Form2 not any problem.

This code:

C#

Form2 frm =new Form2();
frm.MdiParent=this;
frm.Show();

My problem write random data textBox111.Text (e.g Welcomme) click button on Form1. Message box Welcomme not to appear.

This code:

C#

Form2 frm = new Form2();
string msg = frm.textBox111.Text;
MessageBox.Show(msg);

Empty message box to appear.

Sorry for bad English.

Thank you in advance for your help.

Posted 21-Jul-15 7:20am

EssenceGold

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Comments

[no name] 21-Jul-15 13:41pm

You create a brand new never before seen Form2 and get the text from an empty textbox. What else did you expect to happen?

Sergey Alexandrovich Kryukov 21-Jul-15 13:44pm

This is the answer. Why not posting it as a solution?
—SA

EssenceGold 21-Jul-15 13:50pm

My aim is to save all the data files in the TextBox on form2. But I can not access the data that I wrote out form1. Even if the data does not show, as I wrote in the above example.

[no name] 21-Jul-15 13:59pm

You need to use the already existing instance of your form. Not create new instances that are empty.

2 solutions

Solution 1

Have a look here: Transferring information between two forms, Part 2: Child to Parent[^]

Posted 21-Jul-15 8:00am

OriginalGriff

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EssenceGold · Accepted Answer · 2015-07-21T09:02:00

Hi everybody. My problem solved. Below the code solves my problem. Thank you for your interest.

C#

public partial class Form1 : Form
 {

     Form2 frm;

     public Form1()
     {
         InitializeComponent();
     }

     private void toolStripButton2_Click(object sender, EventArgs e)
     {
         frm = new Form2();
         frm.MdiParent = this;
         frm.Show();
     }

     private void toolStripButton1_Click(object sender, EventArgs e)
     {
        MessageBox.Show(frm.textBox111.Text);
     }
 }