Pass data between open C # Forms

Question

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);
    }
}