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Tip of the Day
Language: Visual Basic
Expertise: Beginner
Oct 24, 2001

Switch a Combo Box Sort from Alpha to Number


Don't forget to turn off the .sorted property on the combo box before calling!
 
ResortCboFromAlphaToNum cboAbc

Public Sub ResortCboFromAlphaToNum(cc As ComboBox)
    'resorts given combobox from alpha sort (usual) 
to numeric sort
    'e.g.  1,11,2,22 >> 1,2,11,22
    Dim ListStrArr() As String
    Dim ItemDataLngArr() As Long
    Dim tmpLng As Long
    Dim tmpStr As String

    Dim i As Integer
    Dim j As Integer
    Dim ListCountInt As Integer

    Dim LargestValLng As Long
    Dim ArrayPosInt As Integer
    ListCountInt = cc.ListCount

    If ListCountInt = 0 Then Exit Sub

    ReDim ListStrArr(ListCountInt - 1)
    ReDim ItemDataLngArr(ListCountInt - 1)

    For i = 0 To ListCountInt - 1
        ListStrArr(i) = cc.List(i)
        ItemDataLngArr(i) = cc.ItemData(i)
    Next
    'note, sorting operation is MUCH faster against 
arrays than with combo object
    'uses exchange sort, not optimal, but adequate
    For i = 0 To ListCountInt - 1
        LargestValLng = 0
        For j = i To ListCountInt - 1
            If LargestValLng <= val(ListStrArr(j)) 
Then
                LargestValLng = val(ListStrArr(j))
                'swap
                tmpStr = ListStrArr(i)
                tmpLng = ItemDataLngArr(i)

                ListStrArr(i) = ListStrArr(j)
                ItemDataLngArr(i) = ItemDataLngArr(j)

                ListStrArr(j) = tmpStr
                ItemDataLngArr(j) = tmpLng
            End If
        Next 'j
    Next 'i

    For i = 0 To ListCountInt - 1
        cc.List(i) = ListStrArr(ListCountInt - 1 - i)
        cc.ItemData(i) = ItemDataLngArr
(ListCountInt - 1 - i)
    Next
    cc.Refresh
End Sub
Patrick Marshall
 
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