How to clear textBoxes on another form?

Question

C++ / C#

private
This is how the form actually looks like.
void Cancel_Click(object sender, EventArgs e)
{
Close();
Form1 f = new Form1();
f.textBox1.Text = null;
f.textBox2.Text = "";
f.textBox3.Text = string.Empty;
}
Tried to write like this, but it doesn't work. The form closes and the textBoxes are not cleared.

Answer 1

You create a new form and clear the data in it, which is why the current version does not work.
As I understand it, you need to clear the data in an already created form.
The most correct solution would be
in Form1:

Form2 f2 = new Form2();
if (f2.ShowDialog() == DialogResult.OK)
{
  TextBox1.Text = "ok";
}
else 
{
  TextBox1.Text = "";
}

And in Form2

private void Cancel_Click(object sender, EventArgs e)
{
  dialogResult = DialogResult.Cancel;
  Close();
}

private void OK_Click(object sender, EventArgs e)
{
  dialogResult = DialogResult.OK;
  Close();
}

An alternative solution would be to store a reference to Form1 in the static field of the Program class and access form 1 through Program.form1

Answer 2

So your object f is thrown away immediately after the Cancel_Click method is completed, you do nothing with it, do not open this form, etc.