Moving through sequential array items - excel

Question

The code below creates an array of unique values from values in Column A. Each selected array element is used to select a range on the sheet. The range is displayed in a userform Listbox.
I would like help with code that would allow the user to scroll through each array ‘MyarUniqVal’ element via two form buttons Right ‘>>’ and Left ‘<<’. Each time a button is pressed a sequential array item will be selected and a new range will populate the Listbox.
Any help would be greatly appreciated.
Thanks,
Please see the code below:
Sub testRange3()
Dim lastrow, i, j As Long
Dim c As Range, rng As Range
Dim MyArUniqVal() As Variant
ReDim MyArUniqVal(0)
'With ActiveSheet
With ThisWorkbook.Worksheets("Temp")
lastrow = .Cells(.Rows.Count, "A").End(xlUp).Row
For i = 1 To lastrow
If .Cells(i, 1).Value <> .Cells(i + 1, 1).Value Then
MyArUniqVal(UBound(MyArUniqVal)) = .Cells(i, 1).Value
ReDim Preserve MyArUniqVal(UBound(MyArUniqVal) + 1)
End If
Next
ReDim Preserve MyArUniqVal(UBound(MyArUniqVal) - 1)
End With
For j = LBound(MyArUniqVal) To UBound(MyArUniqVal)
'Prints out each array to Immediate Window
Debug.Print j
'Prints out unique values from Column A stored in array to Immediate Window
Debug.Print MyArUniqVal(j)
Next
With ThisWorkbook.Worksheets("Temp")
'changed to ActiveSheet
'With ActiveSheet
For Each c In .Range("A1:A" & lastrow)
For j = LBound(MyArUniqVal) To UBound(MyArUniqVal)
If UCase(c.Text) = j Then
'If UCase(c.Text) = "B" Then
If rng Is Nothing Then
Set rng = .Range("B" & c.Row).Resize(, 2)
Debug.Print rng
Else
Set rng = Union(rng, .Range("B" & c.Row).Resize(, 2))
Exit For
Debug.Print rng
End If
End If
Next
Next c
End With
If Not rng Is Nothing Then rng.Select
End Sub

Answer 1

See the following code to get you heading the the right direction. I took the approach of adding another listbox that displayed the available prefixes to help the user see what was available and then searching the data column for entries containing the selected prefix.
Hopefully you will be able to adapt the name of the variables and objects to whatever you are currently using. Let me know if anything needs clarification. Best of luck with your project.
My sample form code:
Private Sub cmdBack_Click()
code_frmMain.IncrementValue (0)
End Sub
Private Sub cmdNext_Click()
code_frmMain.IncrementValue (1)
End Sub
Private Sub lstPrefixes_Change()
code_frmMain.DisplayNext
End Sub
Private Sub UserForm_Initialize()
code_frmMain.testRange3
End Sub
My sample program code:
' This subroutine will search column B for the selected value
Sub DisplayNext()
Dim searchTerm As String
Dim lastRow As Long
Dim i As Integer
' clear frmMain.lstResults
frmMain.lstResults.Clear
For i = 0 To frmMain.lstPrefixes.ListCount - 1
If frmMain.lstPrefixes.Selected(i) = True Then
searchTerm = frmMain.lstPrefixes.List(i)
Exit For ' exits once selected item is found
End If
Next i
'Debug.Print searchTerm
With Sheets("Temp")
lastRow = .Range("A" & .Rows.Count).End(xlUp).Row
End With
For i = 1 To lastRow
If InStr(Cells(i, 2).Value, searchTerm) Then
frmMain.lstResults.AddItem (Cells(i, 2).Value)
End If
Next i
End Sub
' increments value. input direction: 0 is down and 1 is up
Sub IncrementValue(direction As Integer)
Dim currentIndex As Integer
currentIndex = -1
For i = 0 To frmMain.lstPrefixes.ListCount - 1
If frmMain.lstPrefixes.Selected(i) = True Then
currentIndex = frmMain.lstPrefixes.ListIndex
Exit For ' exits once selected item is found
End If
Next i
' defaults to first item if none selected
If currentIndex = -1 Then
frmMain.lstPrefixes.Selected(0) = True
currentIndex = 0
End If
If direction = 0 Then
' prevents listIndex from being invalid
If currentIndex = 0 Then
frmMain.lstPrefixes.Selected(frmMain.lstPrefixes.ListCount - 1) = True
Else
frmMain.lstPrefixes.Selected(currentIndex - 1) = True
End If
Else
If currentIndex = frmMain.lstPrefixes.ListCount - 1 Then
frmMain.lstPrefixes.Selected(0) = True
Else
frmMain.lstPrefixes.Selected(currentIndex + 1) = True
End If
End If
End Sub
Note that I also added this to the bottom of your testRange3() to use that data that you had already gathered:
For i = 0 To UBound(MyArUniqVal)
frmMain.lstPrefixes.AddItem (MyArUniqVal(i))
Next i
Sample Data:
Running on user form: