Headers for all data are in row 1, starting in column A

On sheet3 I have the data

State Restaurant Food
AL BK A
AL BK B
AL WIMPY C
AL WIMPY B
AL WIMPY D
AL MC A
AL MC D
AR HARD A
AR HARD F
.. . .

on Sheet 3a I have a list of unique states (preprocessed for speed).
State
AL
AR
.. . .

I have a userform with 3 comboboxes. In the Userform Code:

Option Explicit
Dim Data As Range
Dim LowestLevel As Long


Private Sub ComboBox1_click()
Dim rng As Range, cell As Range
Dim res As Variant
Dim varr() As String
Dim icnt As Long
Dim bFirst As Boolean
ReDim varr(1 To 50)
If ComboBox1.ListIndex < -1 Then
If LowestLevel 1 Then
Data.Parent.ShowAllData
End If
Worksheets("Sheet3").AutoFilter.Range _
.AutoFilter Field:=1, _
Criteria1:=ComboBox1.Value
LowestLevel = 2
ComboBox2.Clear
On Error Resume Next
Set rng = Data.Columns(2).SpecialCells(xlVisible)
On Error GoTo 0
bFirst = True
For Each cell In rng
If bFirst Then
ComboBox2.AddItem cell.Value
icnt = 1
varr(icnt) = cell.Value
bFirst = False
Else
res = Application.Match(cell.Value, varr, 0)
If IsError(res) Then
icnt = icnt + 1
varr(icnt) = cell.Value
ComboBox2.AddItem cell.Value
If icnt = UBound(varr) Then _
ReDim Preserve varr(1 To UBound(varr) + 50)
End If
End If
Next
Else
ComboBox2.Clear
ComboBox2.ListIndex = -1
End If
End Sub

Private Sub ComboBox2_click()
Dim rng As Range, cell As Range
Dim varr() As String
Dim res As Variant
Dim bFirst As Boolean
Dim icnt As Long
ReDim varr(1 To 50)
If ComboBox1.ListIndex < -1 And _
ComboBox2.ListIndex < -1 Then
If LowestLevel 2 Then
Data.Parent.ShowAllData
Worksheets("Sheet3").AutoFilter.Range _
.AutoFilter Field:=1, _
Criteria1:=ComboBox1.Value
End If
Worksheets("Sheet3").AutoFilter.Range _
.AutoFilter Field:=2, _
Criteria1:=ComboBox2.Value
LowestLevel = 3
ComboBox3.Clear
On Error Resume Next
Set rng = Data.Columns(3).SpecialCells(xlVisible)
On Error GoTo 0
bFirst = True
For Each cell In rng
If bFirst Then
ComboBox3.AddItem cell.Value
icnt = 1
varr(icnt) = cell.Value
bFirst = False
Else
res = Application.Match(cell.Value, varr, 0)
If IsError(res) Then
icnt = icnt + 1
varr(icnt) = cell.Value
ComboBox3.AddItem cell.Value
If icnt = UBound(varr) Then _
ReDim Preserve varr(1 To UBound(varr) + 50)
End If
End If
Next
Else
ComboBox3.Clear
ComboBox3.ListIndex = -1
End If
End Sub

Private Sub UserForm_Initialize()
Dim rng As Range
With Worksheets("Sheet3a")
Set rng = .Cells(1, 1).CurrentRegion.Columns(1)
Set rng = rng.Offset(1, 0).Resize(rng.Rows.Count - 1)
End With
ComboBox1.RowSource = rng.Address(external:=True)
With Worksheets("Sheet3")
Set rng = .Cells(1, 1).CurrentRegion
If Not .AutoFilterMode Then
rng.AutoFilter
Else
If .FilterMode Then
.ShowAllData
End If
End If
Set Data = .AutoFilter.Range
Set Data = Data.Offset(1, 0).Resize( _
Data.Rows.Count - 1)
End With
End Sub


--
Regards,
Tom Ogilvy


Pantelis wrote in message
...
Thanks for your prompt response, your math is not bad it is something like
that, the problem is I have to solve this problem in excel. I would
appreciate if you could give me an indication of what the code would have
to
be for something like this.

Thanks in advance

Pantelis




"Tom Ogilvy" wrote in message
...
of course, 50 states x 25 restaurants x 25 items = 31250 rows as a
level
of
magnitude check. Unless this is some toy problem for a school
assignment
or
something, Excel may not be the medium where you want to store your
data.

--
Regards,
Tom Ogilvy

Tom Ogilvy wrote in message
...
there is no magic built in support for this. You would have to write
code
to do all this

I would put my data on a worksheet as a database and use the
Autofilter
to
do the filtering (as the user makes a selection, set the criteria in
the
autofilter for that column) - then populate the next box by looping
through
the visible cells and using additem.

--
Regards,
Tom Ogilvy

Pantelis wrote in message
...
Hi all,

I am creating a bunch of combo boxes which I would like them to work
in
the
same way as a filter in excel.

I have a sheet with a bunch of headings say "state", "restaurants"
and
"food
offered".

Each state has a number of restaurants that can be common i.e.
wimpy,
BigMac, King.

So I want to put a combobox that when I select a "State" it will
filter
all
the restaurants in that state and only shows those restaurants in
the
second
combobox and then when I choose the restaurant in the specific state
it
will
show me the various foods available in that restaurant in the next
combo
box.

Thank you for anybodies help in advance.......

Really stuck here!!!

Pantelis