Can ComboBox be setted as readonly?

agraham

Expert
Licensed User
I was under the impression that the combobox is read-only?
Yes but it is a bit messy as you can type into the ComboBox and doing so resets SelectedIndex.

However (he said with an appropriate flourish!) with my ControlEvents library http://www.basic4ppc.com/forum/showthread.php?t=934 and an undocumented Text property of the ComboBox

B4X:
Sub Globals
   'Declare the global variables here.   
   CB1index = -1
End Sub

Sub App_Start
   Form1.Show
   CbEvents.New1("ComboBox1")
End Sub

Sub ComboBox1_SelectionChanged(I, v)
    CB1index = ComboBox1.SelectedIndex
End Sub

Sub CbEvents_TextChanged
    If CB1Index >= 0 Then ' AND ComboBox1.SelectedIndex = -1  Then
      ' the user has typed into a selection and so unset SelectedIndex so reset it
      ComboBox1.SelectedIndex = CB1index
      ComboBox1.Text = ComboBox1.Item(ComboBox1.SelectedIndex)
   Else   
      ' the useR is trying to type into the empty combobox - don't let him!
      ComboBox1.Text = ""
   End If
End Sub
 

specci48

Well-Known Member
Licensed User
Everyone should remember that the combobox has a different behaviour on the desktop and on the device.
- on the desktop, you are able to write free text into a combobox so that the selectedIndex returns -1
- on the device, it is not possible to "edit" the combobox

This seems to be a difference between .Net and .Net CF.


specci48
 
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