Question

how do I check if a form is closed?

I want to reload a listview’s items when I close another form.
What I’m doing is:

Form1 = form with ListView
Form2 = form with TextBoxes

• Opening a new form.
• Creating a new folder via a textbox.
• When I press “Add” in Form2 I want to reload the “ListView” on Form1.

So how am I supposed to do this?

And sorry for my bad English :(.

Answer 1

The simplest answer is to make a public method on Form1, let’s call it RefreshList() and in your button click event on Form2, you simply call Form1.RefreshList. Here’s a quick sample:

Form 2:

public Form1 ParentForm { get; set; }

private void Button_Click(object Sender, EventArgs args) {
{
    // After the rest of your handler
    if(ParentForm != null)
        ParentForm.RefreshList();

    Close(); // Close Form2 here, we're done!
}   

Form 1:

private void ShowForm2() 
{
    Form2 form2 = new Form2();
    form2.ParentForm = this;
    form2.Show();
}

public void RefreshList() 
{
   // do your refresh here
}

Initially you mention that you want to do this when Form2 closes, but then later you mention that you want to do it “When I press “Add” in Form2 I want to reload the “ListView” on Form1.” As others have mentioned, you can use the Closed event, so I took this approach to address your second case.