Question

I have a ListBoxControl in a Form (Form1) and a button under it which I want to show me another form (Form2).

In the Form2 I have a TextBox and a button and I want when I click on this button to Add the current text in the TextBox to the ListBoxControl which is in the other form Form1.

How can I do that ?

Form 1 :

Form 2 :

Answer 1

There is a standard pattern for using dialogs.

On Form2, provide a property for reading the control:

public string KeyWord
{
   get { return Textbox1.Text; }
}

On Form1, when a Button is clicked:

using (Form2 dialog = new Form2())
{
    // init Form2

    var result = dialog.ShowDialog();

    if (result == DialogResult.OK)
    {
        sting newKeyWord = dialog.KeyWord;
        // add to listbox
    }
}