Add userControl2 to Panel2 from userControl1 button in Panel1

Question

How to get userControl2 from button click on userControl1 into panel2?

Pressing the button New shows userControl1 control on Panel1, but I want to show usercontrol2 by pressing userControl1 button to panel2 userControl2. I couldn't do it.

private void btnNewDay_Click(object sender, EventArgs e) {
  frmMain main = new frmMain();
  main.panel2.Controls.Clear();
  userControls.ucNewDay newDay = new userControls.ucNewDay();
  main.panel2.Controls.Add(newDay);
  main.userControlcontrol = true;
}

Answer 1

You're creating a new form with new frmMain();. What you need is to get a handle of the current form. You can do that by simply using the this keyword, but this is even optional and you don't have to use anything. However, in a user control, this refers to the control. In this case use the Parent property.

Change the first line:

frmMain main = new frmMain();

to:

frmMain main = (frmMain)this.Parent;

Alternatively, you can use the FindForm() method:

frmMain main = (frmMain)this.FindForm();