Pass data between open C # Forms

Hi happy new year

My problem is the following, in Form1 I have 3 buttons, the 2 at the top open the FrmFruit and the FrmVegetable in the panel, the button next to the text boxes opens the FrmFruit outside of the panel.

If I open the form from the enter button, I enter the data in it and when I enter I send the data from the FrmFruit to Form1 without problem, but if I try it from the FrmFruit open in the panel, no data is passed to me, see if you can help me.

what I need is to be able to send the data from the FrmFruit open in the panel, without it closing or opening another form.

Form1

public partial class Form1 : Form, Clform
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
public void ChangeTextBoxText(string text)
{
tbxName.Text = text;
tbxquantity.Text = text;
}
//BUTTON OPEN THE FORM
private void btnEnter_Click(object sender, EventArgs e)
{
FrmFruit form2 = new FrmFruit ();
form2.ShowDialog(this);
}
//METHOD TO OPEN THE FORM ON THE PANEL----------------------------------------------------------
private Form formActived = null;
private void OpenFormPanel(Form FormSon)
{
if (formActived != null)
formActived .Close();
formActived = FormSon;
FormSon.TopLevel = false;
FormSon.Dock = DockStyle.Fill;
pnlcontent.Controls.Add(FormSon);
pnlcontent.Tag = FormSon;
FormSon.BringToFront();
FormSon.Show();
}
// BUTTON OPEN THE FORM ON THE PANEL
private void btnFruit_Click(object sender, EventArgs e)
{
OpenFormPanel(new FrmFruit ());
}
}

FormFruit

public partial class FrmFruit : Form
{
public FrmFruit()
{
InitializeComponent();
}
// ENTER BUTTON
private void btnEnter_Click(object sender, EventArgs e)
{
Iform formInterface = this.Owner as Iform;
if (formInterface != null)
formInterface.ChangeTextBoxText(tbxNameFruit.Text, );
formInterface.ChangeTextBoxText(tbxquantityFruit.Text);
}
}

4 Replies

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Amit Gupta5y ago
@Alynson, The demo project is that what your requirement is. The delegate and eventhandlers doesn't limited to opened forms. Do download the project and see how it works with a simple events.
Rajanikant Hawaldar5y ago
you can do it check how to use delegate and event
Alynson Torres5y ago
very good input, but actually not what I want, what I want for example: pass data from Form2 to Form1 both open and Without closing both Form when passing data
Amit Gupta5y ago
It is a very basic question, a long time ago, I had created a demo to update the second form having events (see attachment project from the below link) https://www.c-sharpcorner.com/forums/pass-value-from-one-form-to-another-form-and-refresh