how to pass value from child form to parent form ?

Question

0.00/5 (No votes)

See more:

hi

i want to how to pass value from child from to parent form
for example

im in form1

form2 a = new form2()
a.showDialog(this)////this is parent form ((form1))

i want to return value form form2 to form1 when i finish from form2

if any one can help me please as fast as you can

thanks

Posted 4-Mar-11 11:13am

abdojawad

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2011-03-04T11:25:00

This is way too simple. Wrap show dialog. Remember, when ShowDialog closes the form, it still exists. Also, don't close it, just hide.

C#

partial class MyDialogForm : Form {
   internal MyData ControlsToData() { /* implement getting value you need */ }
   protected override void OnFormClosing(FormClosingEventArgs e) {
       if (e.CloseReason == CloseReason.UserClosing) {
           e.Cancel = true;
           Hide();
       } //if user closing
   } //OnFormClosing
} //class MyDialogForm

//...

MyDialogForm MyDialog = new MyDialogForm();

//...

MyData ShowDialog() {
    MyDialog.ShowDialog();
    return MyDialog.ControlsToData();
} //ShowDialog

//or if you want to take into account <code>DialogResult</code>, can be something like that:
MyData ShowDialogWithCancel() {
    if (MyDialog.ShowDialog() == DialogResult.Cancel)
        return null;
    return MyDialog.ControlsToData();
} //ShowDialogWithCancel

—SA

Member 3919336 · Answer 2 · 2011-03-04T11:41:00

if you pass the parent to the child when you create it, i.e.

//in FormA...
//call to instantiate formB
formB b = new formB(this); in the parent form
b.Show();
//to do that you need to create a new constructor and add a variable in formB similar to what's shown below

//create variable to hold any form object
private System.Windows.Forms.Form thisParent;
//new construction
public formB(Form f)
{
this.thisParent = f;
InitializeComponent();
}

//then
//create a public function in formA that handles the value you want to pass to formA
public void DoSomething(string someValue)
{
textbox1.text = somevalue;
return;
}

//In the formB.cs add something like the following
//to pass the value to formA
formA a = (formA)this.thisParent;
a.DoSomething("valueToPass");

This also give you the option to close formB and redisplay formA

how to pass value from child form to parent form ?

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0