need a robust transpose(array) function

[John Keith]

I am trying to load an ADO record set to a Listbox on a form.
By using... vadata = rs.GetRows The records set is loaded into a variant
array, but I need to transpose the array so my records go left-to-right
instead of top-down.

I found this gem:
Application.WorksheetFunction.Transpose(vaData)
but when the record set has more then 255 rows, it gets a type mismatch. I
think this is because excel won't handle that many columns.

Here is what I have attempted (unsuccessfully):
Function Transpose2D(vaData) As Variant
'Transpose the input array swapping rows for columns
Dim i As Long, j As Long
Dim vaTransposed As Variant
ReDim vaTransposed(LBound(vaData, 1) To UBound(vaData, 1), _
LBound(vaData) To UBound(vaData)) As Variant
For i = LBound(vaData) To UBound(vaData)
For j = LBound(vaData, 1) To UBound(vaData, 1)
vaTransposed(j, i) = vaData(i, j)
Next j
Next i
Transpose2D = vaTransposed
Set vaTransposed = Nothing
End Function

vaData is reported as "Variant/Variant(0 to 4, 0 to 807)"
but the results of the reDim are (0 to 4, 0 to 4). The function returns the
first 5 rows, but the rest are dropped.

I seem to recall that ReDim can not handle ReDim'ing multi-dim arrays.
How do I get around this ReDim limitation, or is there a better way to
transpose large arrays?

 

[Alan Beban]

The following is a Transpose function; you can judge its robustness for
yourself:

Function ArrayTranspose(InputArray)
'This function returns the transpose of
'the input array or range; it is designed
'to avoid the limitation on the number of
'array elements and type of array that the
'worksheet TRANSPOSE Function has.

'Declare the variables
Dim outputArrayTranspose As Variant, arr As Variant, p As Integer
Dim i As Long, j As Long

'Check to confirm that the input array
'is an array or multicell range
If IsArray(InputArray) Then

'If so, convert an input range to a
'true array
arr = InputArray

'Load the number of dimensions of
'the input array to a variable
On Error Resume Next

'Loop until an error occurs
i = 1
Do
z = UBound(arr, i)
i = i + 1
Loop While Err = 0

'Reset the error value for use with other procedures
Err = 0

'Return the number of dimensions
p = i - 2
End If

If Not IsArray(InputArray) Or p > 2 Then
Msg = "#ERROR! The function accepts only multi-cell ranges and
1D or 2D arrays."
If TypeOf Application.Caller Is Range Then
ArrayTranspose = Msg
Else
MsgBox Msg, 16
End If
Exit Function
End If

'Load the output array from a one-
'dimensional input array
If p = 1 Then

Select Case TypeName(arr)
Case "Object()"
ReDim outputArrayTranspose(LBound(arr) To UBound(arr),
LBound(arr) To LBound(arr)) As Object
For i = LBound(outputArrayTranspose) To
UBound(outputArrayTranspose)
Set outputArrayTranspose(i,
LBound(outputArrayTranspose)) = arr(i)
Next
Case "Boolean()"
ReDim outputArrayTranspose(LBound(arr) To UBound(arr),
LBound(arr) To LBound(arr)) As Boolean
Case "Byte()"
ReDim outputArrayTranspose(LBound(arr) To UBound(arr),
LBound(arr) To LBound(arr)) As Byte
Case "Currency()"
ReDim outputArrayTranspose(LBound(arr) To UBound(arr),
LBound(arr) To LBound(arr)) As Currency
Case "Date()"
ReDim outputArrayTranspose(LBound(arr) To UBound(arr),
LBound(arr) To LBound(arr)) As Date
Case "Double()"
ReDim outputArrayTranspose(LBound(arr) To UBound(arr),
LBound(arr) To LBound(arr)) As Double
Case "Integer()"
ReDim outputArrayTranspose(LBound(arr) To UBound(arr),
LBound(arr) To LBound(arr)) As Integer
Case "Long()"
ReDim outputArrayTranspose(LBound(arr) To UBound(arr),
LBound(arr) To LBound(arr)) As Long
Case "Single()"
ReDim outputArrayTranspose(LBound(arr) To UBound(arr),
LBound(arr) To LBound(arr)) As Single
Case "String()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), LBound(arr, 1) To UBound(arr, 1)) As String
Case "Variant()"
ReDim outputArrayTranspose(LBound(arr) To UBound(arr),
LBound(arr) To LBound(arr)) As Variant
Case Else
Msg = "#ERROR! Only built-in types of arrays are
supported."
If TypeOf Application.Caller Is Range Then
ArrayTranspose = Msg
Else
MsgBox Msg, 16
End If
Exit Function
End Select
If TypeName(arr) <> "Object()" Then
For i = LBound(outputArrayTranspose) To
UBound(outputArrayTranspose)
outputArrayTranspose(i, LBound(outputArrayTranspose)) =
arr(i)
Next
End If

'Or load the output array from a two-
'dimensional input array or range
ElseIf p = 2 Then
Select Case TypeName(arr)
Case "Object()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As Object
For i = LBound(outputArrayTranspose) To _
UBound(outputArrayTranspose)
For j = LBound(outputArrayTranspose, 2) To _
UBound(outputArrayTranspose, 2)
Set outputArrayTranspose(i, j) = arr(j, i)
Next
Next
Case "Boolean()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As Boolean
Case "Byte()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As Byte
Case "Currency()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As Currency
Case "Date()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As Date
Case "Double()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As Double
Case "Integer()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As Integer
Case "Long()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As Long
Case "Single()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As Single
Case "String()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As String
Case "Variant()"
ReDim outputArrayTranspose(LBound(arr, 2) To
UBound(arr, 2), _
LBound(arr) To UBound(arr)) As Variant
Case Else
Msg = "#ERROR! Only built-in types of arrays are
supported."
If TypeOf Application.Caller Is Range Then
ArrayTranspose = Msg
Else
MsgBox Msg, 16
End If
Exit Function
End Select
If TypeName(arr) <> "Object()" Then
For i = LBound(outputArrayTranspose) To _
UBound(outputArrayTranspose)
For j = LBound(outputArrayTranspose, 2) To _
UBound(outputArrayTranspose, 2)
outputArrayTranspose(i, j) = arr(j, i)
Next
Next
End If
End If

'Return the transposed array
ArrayTranspose = outputArrayTranspose
End Function