clear Winforms GroupBox without destroying content

Question

I want to clear the content of a GroupBox to fill it with new options, but I cant use the Dispose() function since I don't want to destroy the objects in it (Textboxes from another class). Is there a way to empty a GroupBox without destroying the content?

EDIT: Since its difficult to understand what exactly I want, here is what I tried to do (this is IronPython btw, but that shouldnt be a problem)

def loadMethod(self, sender, e):
    self.MethodParaBox.Visible = True
    for i in self.MethodParaBox.Controls:
        self.MethodParaBox.Controls[0].Dispose()

    panel = Panel()
    panel.AutoScroll = True
    panel.Width = 150
    panel.Height = 130
    panel.Left = 25
    panel.Top = 25
    self.MethodParaBox.Controls.Add(panel)

    for i, z in enumerate(self.parent.getParameter(self.project.SelectedItem, self.design.SelectedItem)):
        if self.textBoxList[i].value.Enabled == False:
            label = Label()
            label.Left = 0
            label.Top = 30 * i
            label.Width = 80
            label.Text = z
            panel.Controls.Add(label)

            self.textBoxList[i].option3.Left = 90
            self.textBoxList[i].option3.Top = 0 + 30 * i
            self.textBoxList[i].option3.Width = 40
            panel.Controls.Add(self.textBoxList[i].option3)

if i call this function a second time it will throw an exception because the textbox no longer exists

Answer 1

Try ControlCollection.Remove

foreach(Control c in groupBox.Controls()) groupBox.Controls.Remove(c);

Alternatively you can use groupBox.Controls.Clear()

Answer 2

you can use Control.ControlCollection.Clear Method

  groupBox.Controls.Clear()

Or Control.ControlCollection.RemoveAt Method

While groupBox.Controls.Count > 0
    groupBox.Controls.RemoveAt(0)
End While

Or by using For loop with Remove method

For i As Integer = (groupBox.Controls.Count - 1) To 0 Step -1
  Dim ctrl As Control = groupBox.Controls(i)
  groupBox.Controls.Remove(ctrl)
  ctrl.Dispose()
Next i

Answer 3

You can simply select the groupbox contents in the design and move them away from the gb and then you can delete it safely and move back the contents as you wish.