how to iterate over all rows of a excel sheet in VBA - excel

Question

I have this code (This code is in Access VBA which tries to read an excel file and after checking, possibly import it):
Set ExcelApp = CreateObject("Excel.application")
Set Workbook = ExcelApp.Workbooks.Open(FileName)
Set Worksheet = Workbook.Worksheets(1)
now I want to iterate over all rows of the excel worksheet. I want something such as this:
for each row in Worksheet.rows
ProcessARow(row)
next row
where
function ProcessARow(row as ???? )
' process a row
' how Should I define the function
' how can I access each cell in the row
' Is there any way that I can understand how many cell with data exist in the row
end function
My questions:
How to define the for each code that it iterate correctly on all
rows that has data?
How to define ProcessARow properly
How to get the value of each cell in the row.
How to find how many cell with data exist in the row?
Is there any way that I detect what is the data type of each cell?
edit 1
The link solves on problem :
How to define the for each code that it iterate correctly on all rows that has data?
but what about other questions?
For example, how to define ProcessARow correctly?

Answer 1

If you need the values in the Row, you need use the 'Value' Property and after do an cycle to get each value
for each row in Worksheet.rows
Values=row.Value
For each cell in Values
ValueCell=cell
next cell
next row

Answer 2

Unfortunately you questions are very broad however I believe the below sub routine can show you a few ways of achieving what you are after. In regards to what datatype each cell is more involved as it depends what data type you wish to compare it to however I have included some stuff to hopefully help.
sub hopefullyuseful()
dim ws as worksheet
dim rng as Range
dim strlc as string
dim rc as long, i as long
dim lc as long, j as long
dim celltoprocess as range
set ws = activeworkbook.sheets(activesheet.name)
strlc = ws.cells.specialcells(xlcelltypeLastCell).address
set rng = ws.range("A1:" & lc)
rc = rng.rows.count()
debug.print "Number of rows: " & rc
lc = rng.columns.count()
debug.print "Number of columns: " & lc
'
'method 1 looping through the cells'
for i = 1 to rc
for j = 1 to lc
set celltoprocess = ws.cells(i,j)
'this gives you a cell object at the coordinates of (i,j)'
'[PROCESS HERE]'
debug.print celltoprocess.address & " is celltype: " & CellType(celltoprocess)
'here you can do any processing you would like on the individual cell if needed however this is not the best method'
set celltoprocess = nothing
next j
next i
'method 2 looping through the cells using a for each loop'
for each celltoprocess in rng.cells
debug.print celltoprocess.address & " is " & CellType(celltoprocess)
next celltoprocess
'if you just need the data in the cells and not the actual cell objects'
arrOfCellData = rng.value
'to access the data'
for i = lbound(arrOfCellData,1) to ubound(arrOfCellData,1)
'i = row'
for j = lbound(arrOfCellData,2) to ubound(arrOfCellData,2)
'j = columns'
debug.print "TYPE: " & typename(arrOfCellData(i,j)) & " character count:" & len(arrOfCellData(i,j))
next j
next i
set rng=nothing
set celltoprocess = nothing
set ws = nothing
end sub
Function CellType(byref Rng as range) as string
Select Case True
Case IsEmpty(Rng)
CellType = "Blank"
Case WorksheetFunction.IsText(Rng)
CellType = "Text"
Case WorksheetFunction.IsLogical(Rng)
CellType = "Logical"
Case WorksheetFunction.IsErr(Rng)
CellType = "Error"
Case IsDate(Rng)
CellType = "Date"
Case InStr(1, Rng.Text, ":") <> 0
CellType = "Time"
Case IsNumeric(Rng)
CellType = "Value"
End Select
end function
sub processRow(byref rngRow as range)
dim c as range
'it is unclear what you want to do with the row however... if you want
'to do something to cells in the row this is how you access them
'individually
for each c in rngRow.cells
debug.print "Cell " & c.address & " is in Column " & c.column & " and Row " & c.row & " has the value of " & c.value
next c
set c = nothing
set rngRow = nothing
exit sub
if you want your other questions answered you will have to be more specific as to what you are trying to accomplish

Answer 3

While I like the solution offered by #krazynhazy I believe that the following solution might be slightly shorter and closer to what you asked for. Still, I'd use the CellType function offered by Krazynhazy rather than all the Iif I currently have in the below code.
Option Explicit
Sub AllNonEmptyCells()
Dim rngRow As Range
Dim rngCell As Range
Dim wksItem As Worksheet
Set wksItem = ThisWorkbook.Worksheets(1)
On Error GoTo EmptySheet
For Each rngRow In wksItem.Cells.SpecialCells(xlCellTypeConstants).EntireRow.Rows
Call ProcessARow(wksItem, rngRow.Row)
Next rngRow
Exit Sub
EmptySheet:
MsgBox "Sheet is empty." & Chr(10) & "Aborting!"
Exit Sub
End Sub
Sub ProcessARow(wksItem As Worksheet, lngRow As Long)
Dim rngCell As Range
Debug.Print "Cells to process in row " & lngRow & ": " & wksItem.Range(wksItem.Cells(lngRow, 1), wksItem.Cells(lngRow, wksItem.Columns.Count)).SpecialCells(xlCellTypeConstants).Count
For Each rngCell In wksItem.Range(wksItem.Cells(lngRow, 1), wksItem.Cells(lngRow, wksItem.Columns.Count)).SpecialCells(xlCellTypeConstants)
Debug.Print "Row: " & lngRow, _
"Column: " & rngCell.Column, _
"Value: " & rngCell.Value2, _
IIf(Left(rngCell.Formula, 1) = "=", "Formula", IIf(IsDate(rngCell.Value), "Date", IIf(IsNumeric(rngCell.Value2), "Number", "Text")))
Next rngCell
End Sub
Note, that you have to call the sub to call a row must also include the sheet on which a row should be processed.