Hiding and Showing TabPages in tabControl

Question

Hi,

I am trying to show or hide tabpages as per user choice. If user selects gender male then form for male in a tabpage "male" should be displayed and if user selects female then similar next form should be displayed in next tab "female"

I tried using

tabControl1.TabPages.Remove(...)

and

tabControl1.TabPages.Add(...)

It adds and removes the tabpages but doing so will loose my controls on tabpages too... i can't see them back. what's the problem here?

Answer 1

You could remove the tab page from the TabControl.TabPages collection and store it in a list. For example:

    private List<TabPage> hiddenPages = new List<TabPage>();

    private void EnablePage(TabPage page, bool enable) {
        if (enable) {
            tabControl1.TabPages.Add(page);
            hiddenPages.Remove(page);
        }
        else {
            tabControl1.TabPages.Remove(page);
            hiddenPages.Add(page);
        }
    }

    protected override void OnFormClosed(FormClosedEventArgs e) {
        foreach (var page in hiddenPages) page.Dispose();
        base.OnFormClosed(e);
    }

Answer 2

I have my sample code working but want to make it somewhat more better refrencing the tab from list:

Public Class Form1
    Dim State1 As Integer = 1
    Dim AllTabs As List(Of TabPage) = New List(Of TabPage)

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Check1(State1)
        State1 = CInt(IIf(State1 = 1, 0, 1))
    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        AllTabs.Add(TabControl1.TabPages("TabPage1"))
        AllTabs.Add(TabControl1.TabPages("TabPage2"))
    End Sub

    Sub Check1(ByVal No As Integer)
        If TabControl1.TabPages.ContainsKey("TabPage1") Then
            TabControl1.TabPages.Remove(TabControl1.TabPages("TabPage1"))
        End If
        If TabControl1.TabPages.ContainsKey("TabPage2") Then
            TabControl1.TabPages.Remove(TabControl1.TabPages("TabPage2"))
        End If
        TabControl1.TabPages.Add(AllTabs(No))
    End Sub
End Class