Bobski Bobski - 1 year ago 84 Question

TabControl issue with disabling individual tabs

I have a tabControl in my application - that has 3 tabs. Upon a click on the first tab I'm trying to do something so that user will not be able to get out of that tab - which seems to be a lot more difficult that I anticipated. I'm simply trying to disable the TAB itself - so that they are unable to leave the current tab - the TABPAGE does not have to be disabled since they are not supposed to be able to get out of the current one...

i'm trying something along the way of....




and even trying to hide it


And nothing seems to work.........!

i've even tried


But doesn't do anything


I found this code - will I have to do something with this in order to disable the actual TAB - Not TAB PAGE - I don't want user leaving the tab they've on when they click a specific button...

Private Sub TabControl1_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles TabControl1.DrawItem

Dim g As Graphics
Dim sText As String
Dim iX As Integer
Dim iY As Integer
Dim sizeText As SizeF
Dim ctlTab As TabControl
ctlTab = CType(sender, TabControl)
g = e.Graphics

sText = ctlTab.TabPages(e.Index).Text

sizeText = g.MeasureString(sText, ctlTab.Font)

iX = e.Bounds.Left + 6

iY = e.Bounds.Top + (e.Bounds.Height - sizeText.Height) / 2

g.DrawString(sText, ctlTab.Font, Brushes.Black, iX, iY)

End Sub

Found this here...

Answer Source

They hide Enabled in the property window, but it does partially work. It wont disable the TabPage but as a container control, it does disable all the child controls. The "trick" then becomes how to convey to the user that this or that tab is available: for that, use the image properties:

TabControl1.TabPages(1).Enabled = False
TabControl1.TabPages(1).ImageIndex = 1


enter image description here

You can embellish to make it clear, for instance a label with "Step 1 must be completed first". You can still intervene to stop the tab change with the SelectedIndexChanged event but since they cannot interact with any control, there is no real need.

You can also use the Image part with the SelectedIndexChanged event trap, as a means to tell them it is not available.

There is yet another way but the other alteratives are simpler. This can work ok for a Wizard scenario with a "Next >>" type button

  • Create a List(of TabPage)
  • Store pages 1-N in it
  • Remove Pages 1-N from the TabControl (leaving TabPage(0))
  • When they hit 'Next`, add the next page back to the control


Select Case TabControl1.TabPages.Count
    Case 1
    Case 2
End Select

If there is a "New Foo" button to wizard thru the steps for a new Foo, just remove pages 1-N again. I am not fond of controls coming and going visibility wise, but it can useful when Step Two can vary depending on a value in Step 1 (ie either of TabPage 2, 3 or 4 can be used for Step 2 depending...).