importing more than 65536 rows from .csv file


V

Vamsi Challa

Hi

I am trying import a .csv file which contains more than 65536 rows. I
created a macro to import and it is successfully importing with out a text
qualitfier. can any one help me how to import huge .CSV files to one excel
sheet?

Thank you
Vamsi

Const C_START_ROW_FIRST_PAGE = 2

' data starts on this row for all subsequent sheets
Const C_START_ROW_LATER_PAGES = 2

' worksheet name where data should start. This sheet must exist.
Const C_START_SHEET_NAME = "Sheet1"

' what column do we start placing the data
Const C_START_COLUMN = 2

' newly created worksheets will be named C_SHEET_NAME_PREFIX &
Format(SheetNum,"0")
Const C_SHEET_NAME_PREFIX = "DataImport"

' newly created worksheets will be based on this template sheet. set to
vbNullString if
' you don't want to use a template sheet and use a blank sheet instead.
Const C_TEMPLATE_SHEET_NAME = vbNullString

' update the Application.StatusBar every C_UPDATE_STATUSBAR_EVERY_N_RECORDS
records.
' set this to 0 if you don't want status bar messages.
Const C_UPDATE_STATUSBAR_EVERY_N_RECORDS = 1000

' this is the message to be displayed in the status bar. The number of records
' read so far will be appended to this value.
Const C_STATUSBAR_TEXT = "Processing Record: "



Dim RowNdx As Long ' Current RowNumber
Dim Colndx As Long ' Current Column
Dim FName As Variant ' Input file name
Dim FNum As Integer ' Filenumber returned by FreeFile
Dim WS As Worksheet ' Worksheet on which the data should be
placed
Dim InputLine As String ' The entire line of text read from the
input file
Dim Arr As Variant ' Used with Split to break InputLine
into an array,
' delimited by SplitChart
Dim SplitChar As String ' The character used by Split. This
character delimits
' the input data fields in InputLine.
Typically, this
' character will be a comma, semicolon,
or vbTab.
' If this character is vbNullString, the
input data
' won't be split, and the entire
InputLine will be
' put in column C_START_COLUMN
Dim SheetNumber As Long ' Increments for each worksheet we
populate with data
Dim SaveCalc As XlCalculation ' Caller's Calculation mode.
Dim SaveScreenUpdating As Boolean ' Caller's ScreenUpdating mode
Dim SaveDisplayAlerts As Boolean ' Caller's DisplayAlerts property
Dim SaveEnableEvents As Boolean ' Caller's EnableEvents property
Dim InputCounter As Long ' Counter of all records imported
Dim LastRowForInput As Long ' Indicate the last row on the worksheet
than
' input data should be used. Set this to
a value <= Rows.Count.
Dim MaxRowsPerSheet As Long ' The maximumn number of rows to import
on each sheet.
' Set this to <= 0 if you don't want to
use this parameter.
Dim RowsThisSheet As Long ' Keeps track of the rows imported on to
the current sheet.
Dim TruncatedCount As Long ' Counts the number of records whose
input was truncated because
' it would have gone past the last
column of the worksheet.
Dim strTemp As String

SheetNumber = 1

'''''''''''''''''''''''''''''''''''''''''''''
' Ensure we have an active workbook.
'''''''''''''''''''''''''''''''''''''''''''''
If Application.ActiveWorkbook Is Nothing Then
MsgBox "There is no active workbook."
Exit Sub
End If

''''''''''''''''''''''''''''''''''''''''''''''
' Set what character we're going to
' use to split apart the input line. The
' input line will be SPLIT on this character,
' and each text field will go into its own
' column. Data will be separated by
' SplitChar into multiple columns, starting
' on column C_START_COLUMN. If SplitChar is
' vbNullString, the entire input line is
' placed in C_START_COLUMN. SplitChar must
' be a single character. It is typically
' a comma, semicolon, or vbTab, but it can
' be any character. If SplitChar is set to
' more than one character, it is truncated
' to a single (the left-most) character.
' When placing data elements in separate
' columns, it is possible that the number of
' imported elements would extend past the
' last column of the worksheet. The count
' of records whose input was truncated because
' it would have gone past the last column
' of the worksheet is stored in the TruncatedCount
' variable. The value of this variable is
' displayed at the end of the procedure.
'
''''''''''''''''''''''''''''''''''''''''''''''
SplitChar = ","

''''''''''''''''''''''''''''''''''''''''''''''
' Set the maximum number of data input rows
' to place on each worksheet. Set this
' value to <= 0 or to Rows.Count to fill
' the entire worksheet.
''''''''''''''''''''''''''''''''''''''''''''''
MaxRowsPerSheet = 0&

'''''''''''''''''''''''''''''''''''''''''''''
' Set the LastRowForInput value. This when
' this row number is reached, a new worksheet
' will be created. Set this to 0 or
' WS.Rows.Count to fill the entire worksheet.
'''''''''''''''''''''''''''''''''''''''''''''
LastRowForInput = ActiveWorkbook.Worksheets(1).Rows.Count

''''''''''''''''''''''''''''''''''''''''''''''''''
' Ensure that C_SHEET_NAME_PREFIX is <= 29
' characters. This leaves us two characters for
' the numeric suffix, or 99 added sheets. If
' more sheets are needed, they will be created,
' and the data will be imported, but the sheets
' will have the default Excel-generated name, not
' the C_SHEET_NAME_PREFIX name. They will be in
' the correct order.
''''''''''''''''''''''''''''''''''''''''''''''''''
If (Len(C_SHEET_NAME_PREFIX) < 1) Or (Len(C_SHEET_NAME_PREFIX) > 29) Then
MsgBox "The value of C_SHEET_NAME_PREFIX must have between 1 and 29
characters." & vbCrLf & _
"The current length of C_SHEET_NAME_PREFIX is " &
CStr(Len(C_SHEET_NAME_PREFIX)) & " characters."
Exit Sub
End If

'''''''''''''''''''''''''''''''''''''''''''''''''''
' Ensure C_START_SHEET_NAME refers to an existing
' sheet.
'''''''''''''''''''''''''''''''''''''''''''''''''''
On Error Resume Next
Err.Clear
Set WS = ActiveWorkbook.Worksheets(C_START_SHEET_NAME)
If Err.Number <> 0 Then
MsgBox "The sheet named in C_START_SHEET_NAME (" & C_START_SHEET_NAME &
") does not exist" & vbCrLf & _
"or is not a worksheet (e.g., it is a chart sheet).", vbOKOnly
Exit Sub
End If

''''''''''''''''''''''''''''''''''''''''''''''''''
' Ensure that if C_TEMPLATE_SHEET_NAME is not
' vbNullString, it names an existing sheet, and
' that it is not equal to C_START_SHEET_NAME.
''''''''''''''''''''''''''''''''''''''''''''''''''
On Error Resume Next
Err.Clear
If C_TEMPLATE_SHEET_NAME <> vbNullString Then
Set WS = ActiveWorkbook.Worksheets(C_TEMPLATE_SHEET_NAME)
If Err.Number <> 0 Then
MsgBox "The template sheet '" & C_TEMPLATE_SHEET_NAME & "' does not
exist or is not a worksheet."
Exit Sub
End If
''''''''''''''''''''''''''''''''''''''''''''''''''
' Ensure that C_START_SHEET_NAME does not equal
' C_TEMPLATE_SHEET_NAME
''''''''''''''''''''''''''''''''''''''''''''''''''
If C_TEMPLATE_SHEET_NAME = C_START_SHEET_NAME Then
MsgBox "The C_TEMPLATE_SHEET_NAME is equal to the
C_START_SHEET_NAME." & vbCrLf & _
"This is not allowed."
Exit Sub
End If
End If
On Error GoTo 0

''''''''''''''''''''''''''''''''''''''''''''''''''''
' We may have changed the worksheet referenced by WS
' when testing if C_TEMPLATE_SHEET_NAME exists. Reset
' WS back to C_START_SHEET_NAME.
''''''''''''''''''''''''''''''''''''''''''''''''''''
Set WS = ActiveWorkbook.Worksheets(C_START_SHEET_NAME)

''''''''''''''''''''''''''''''''''''''''''''''''''
' Ensure that none of the following are protected:
' C_START_SHEET_NAME
' C_TEMPLATE_SHEET_NAME
' ActiveWorkbook
''''''''''''''''''''''''''''''''''''''''''''''''''
If WS.ProtectContents = True Then
MsgBox "The worksheet '" & WS.Name & "' is protected."
Exit Sub
End If

If C_TEMPLATE_SHEET_NAME <> vbNullString Then
If ActiveWorkbook.Worksheets(C_TEMPLATE_SHEET_NAME).ProtectContents =
True Then
MsgBox "The Template Sheet (" & C_TEMPLATE_SHEET_NAME & ") is
protected."
Exit Sub
End If
End If

If ActiveWorkbook.ProtectStructure = True Then
MsgBox "The ActiveWorkbook is protected."
Exit Sub
End If



''''''''''''''''''''''''''''''''''''''''''''''
' Prompt the user for a TXT or CSV file
''''''''''''''''''''''''''''''''''''''''''''''
FName = Application.GetOpenFilename(FileFilter:="Text Files (*.txt),*.txt,"
& _
"CSV Files (*.csv),*.csv")
If FName = False Then
' user clicked CANCEL. get out now.
Exit Sub
End If

''''''''''''''''''''''''''''''''''''''''''''''
' Set our starting destination worksheet.
' Error and exit if sheet does not exist
''''''''''''''''''''''''''''''''''''''''''''''
On Error Resume Next
Set WS = ActiveWorkbook.Worksheets(C_START_SHEET_NAME)
If WS Is Nothing Then
MsgBox "The worksheet specified in C_START_SHEET_NAME (" & _
C_START_SHEET_NAME & ") does not exist."
Exit Sub
End If
On Error GoTo 0

'''''''''''''''''''''''''''''''''''''''''''''
' See if the file FName is open by another
' process. If it is, exit the procedure.
'''''''''''''''''''''''''''''''''''''''''''''
If IsFileOpen(FileName:=CVar(FName)) = True Then
MsgBox "The file '" & FName & "' is open by another process."
Exit Sub
End If

''''''''''''''''''''''''''''''''''''''''''''''
' Save the calculation mode and the ScreenUpdating
' mode. Set calculation to manual and turn off
' ScreenUpdating. This will greatly improve
' the performance of the code.
''''''''''''''''''''''''''''''''''''''''''''''
SaveCalc = Application.Calculation
SaveDisplayAlerts = Application.DisplayAlerts
SaveScreenUpdating = Application.ScreenUpdating
SaveEnableEvents = Application.EnableEvents

Application.DisplayAlerts = False
Application.Calculation = xlCalculationManual
Application.ScreenUpdating = False
Application.EnableEvents = False

''''''''''''''''''''''''''''''''''''''''''''''
' Get a file number and open the file
''''''''''''''''''''''''''''''''''''''''''''''
On Error Resume Next
FNum = FreeFile
Err.Clear
Open FName For Input Access Read As #FNum
If Err.Number <> 0 Then
'''''''''''''''''''''''''''''''''''''''''
' If an error occurred, alert the user,
' restore application settings, and
' exit the procedure.
'''''''''''''''''''''''''''''''''''''''''
MsgBox "An error occurred opening file '" & FName & "'." & vbCrLf & _
"Error Number: " & CStr(Err.Number) & vbCrLf & _
"Description: " & Err.Description
Close #FNum
Application.Calculation = SaveCalc
Application.ScreenUpdating = SaveScreenUpdating
Application.DisplayAlerts = SaveDisplayAlerts
Application.EnableEvents = SaveEnableEvents
Exit Sub
End If
On Error GoTo 0

''''''''''''''''''''''''''''''''''''''''''''''
' Initialize the RowNd index variable to
' C_START_ROW_FIRST_PAGE. This constant
' is used to preserve any header rows that
' may be present.
''''''''''''''''''''''''''''''''''''''''''''''
RowNdx = C_START_ROW_FIRST_PAGE

''''''''''''''''''''''''''''''''''''''''''''''
' Ensure that SplitChar is a single character.
''''''''''''''''''''''''''''''''''''''''''''''
If SplitChar <> vbNullString Then
SplitChar = Left(SplitChar, 1)
End If

''''''''''''''''''''''''''''''''''''''''''''''
' If LastRowForInput is <= 0, then set it
' to Rows.Count
''''''''''''''''''''''''''''''''''''''''''''''
If LastRowForInput <= 0 Then
LastRowForInput = WS.Rows.Count
End If

''''''''''''''''''''''''''''''''''''''''
' If MaxRowsPerSheet is <= 0, use Rows.Count
''''''''''''''''''''''''''''''''''''''''
If MaxRowsPerSheet <= 0 Then
MaxRowsPerSheet = Rows.Count
End If


''''''''''''''''''''''''''''''''''''''''''''''
' Loop until we hit the end of the file.
''''''''''''''''''''''''''''''''''''''''''''''
On Error GoTo 0
Do Until EOF(FNum)
''''''''''''''''''''''''''''''''''''''''''''''
' Get the next line of data from the file
''''''''''''''''''''''''''''''''''''''''''''''
Line Input #FNum, InputLine
''''''''''''''''''''''''''''''''''''''''''
' Increment counters.
''''''''''''''''''''''''''''''''''''''''''
InputCounter = InputCounter + 1
RowsThisSheet = RowsThisSheet + 1
''''''''''''''''''''''''''''''''''''''''''
' Determine whether to update the StatusBar.
''''''''''''''''''''''''''''''''''''''''''
If C_UPDATE_STATUSBAR_EVERY_N_RECORDS > 0 Then
If InputCounter Mod C_UPDATE_STATUSBAR_EVERY_N_RECORDS = 0 Then
Application.StatusBar = C_STATUSBAR_TEXT & _
Format(InputCounter, "#,##0")
End If
End If
If SplitChar = vbNullString Then
''''''''''''''''''''''''''''''''''''''
' We're not spliting up the input. Put
' the entire line in column C_START_COLUMN
''''''''''''''''''''''''''''''''''''''
WS.Cells(RowNdx, C_START_COLUMN).Value = InputLine
Else
''''''''''''''''''''''''''''''''''''''''
' SplitChar is not vbNullString.
' We're spliting up the input into columns.
' Use Split to get an array of the items
' in InputLine, delimited by SplitChar,
' and then loop through the Arr array, putting
' each element in its own column
''''''''''''''''''''''''''''''''''''''''
Arr = Split(expression:=InputLine, delimiter:=SplitChar, limit:=-1,
compare:=vbTextCompare)
For Colndx = LBound(Arr) To UBound(Arr)
'''''''''''''''''''''''''''''''''''''''''''''''''''''
' Ensure we don't try to write past the last column
' of the worksheet. If we reach the last column,
' exit out of the For loop.
'''''''''''''''''''''''''''''''''''''''''''''''''''''
If Colndx + C_START_COLUMN <= WS.Columns.Count Then
'strTemp = Arr(Colndx)
If Left(Arr(Colndx), 1) = Chr(34) Then
strTemp = Mid(Arr(Colndx), 2, Len(Arr(Colndx)) - 2)
Else
strTemp = Arr(Colndx)
End If
WS.Cells(RowNdx, Colndx + C_START_COLUMN).Value = strTemp
'Arr(Colndx)
Else
TruncatedCount = TruncatedCount + 1
Exit For
End If
Next Colndx
End If ' SplitChar = vbNullString


'''''''''''''''''''''''''''''''''''''''
' Increment the RowNdx index variable.
' If it is greater than either of the following:
' Rows.Count
' LastRowForInput
' or if RowsThisSheet is > MaxRowsPerSheet
' then create and name a new worksheet and
' reset the RowNdx index variable to
' C_START_ROW_LATER_PAGES.
''''''''''''''''''''''''''''''''''''''''
RowNdx = RowNdx + 1
If (RowNdx > Rows.Count) Or (RowNdx > LastRowForInput) Or (RowsThisSheet
MaxRowsPerSheet) Then
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' We're past the end of the worksheet or past the row
' specified in LastRowForInput or the rows used on this
' worksheet is greater than MaxRowsPerSheet.
'
' Increment the SheetNumber index and either create a
' new sheet (if C_TEMPLATE_SHEET_NAME is vbNullString) or
' copy the C_TEMPLATE_SHEET_NAME worksheet
' immediately after the current sheet, and name it
' C_SHEET_NAME_PREFIX & Format(SheetNumber, "0")
' Reset the RowNdx value to C_START_ROW_LATER_PAGE
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''
SheetNumber = SheetNumber + 1
If C_TEMPLATE_SHEET_NAME = vbNullString Then
Set WS = ActiveWorkbook.Worksheets.Add(after:=WS)
Else
ActiveWorkbook.Worksheets(C_TEMPLATE_SHEET_NAME).Copy after:=WS
Set WS = ActiveWorkbook.ActiveSheet
End If
On Error Resume Next
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' ignore the error that might arise if there is already a
' sheet named
' C_SHEET_NAME_PREFIX & Format(SheetNumber, "0")
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
WS.Name = C_SHEET_NAME_PREFIX & Format(SheetNumber, "0")
On Error GoTo 0

'''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Reset out counters.
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''
RowNdx = C_START_ROW_LATER_PAGES
RowsThisSheet = 0
End If
''''''''''''''''''''''''''''''''''''''''''''''
' end of Read loop
''''''''''''''''''''''''''''''''''''''''''''''
Loop

''''''''''''''''''''''''''''''''''''''''''''''
' Close the input file and restore the saved
' application settings.
''''''''''''''''''''''''''''''''''''''''''''''

Close FNum
Application.Calculation = SaveCalc
Application.ScreenUpdating = SaveScreenUpdating
Application.DisplayAlerts = SaveDisplayAlerts
Application.EnableEvents = SaveEnableEvents
Application.StatusBar = False

''''''''''''''''''''''''''''''''''''''''''''''
' MsgBox to the user indicating we're done.
''''''''''''''''''''''''''''''''''''''''''''''
MsgBox "Import operation from file '" & FName & "' complete." & vbCrLf & _
"Records Imported: " & Format(InputCounter, "#,##0") & vbCrLf & _
"Records Truncated: " & Format(TruncatedCount, "#,##0"), _
vbOKOnly, "Import Text File"

''''''''''''''''''''''
' END OF PROCEDURE
''''''''''''''''''''''
End Sub



Private Function IsFileOpen(FileName As String) As Boolean
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' IsFileOpen
' This function determines whether a file is open by any program. Returns
TRUE or FALSE.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Dim FileNum As Integer
Dim ErrNum As Long

Const C_ERR_NO_ERROR = 0&
Const C_ERR_PERMISSION_DENIED = 70&

On Error Resume Next

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' If we were passed in an empty string, there is no file to test so return
False.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
If FileName = vbNullString Then
IsFileOpen = False
Exit Function
End If

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' If the file doesn't exist, it certainly isn't open. This test will also
' take care of the case of a syntactically invalid file name. A syntactically
' invalid file name will raise an error 52, but Dir will return vbNullString.
' It is up to the calling procedure to ensure that the filename is
syntactically
' valid.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
On Error Resume Next
If Dir(FileName, vbNormal + vbArchive + vbSystem + vbHidden) = vbNullString
Then
IsFileOpen = False
Exit Function
End If

FileNum = FreeFile() ' Get a free file number.
''''''''''''''''''''''''''''''''''''''''''''
' Attempt to open the file and lock it.
''''''''''''''''''''''''''''''''''''''''''''
Err.Clear
Open FileName For Input Lock Read As #FileNum
''''''''''''''''''''''''''''''''''''''''''''
' Save the error number, since it will get
' reset by the Close operation.
''''''''''''''''''''''''''''''''''''''''''''
ErrNum = Err.Number
Close FileNum
''''''''''''''''''''''''''''''''''''
' Check to see which error occurred.
''''''''''''''''''''''''''''''''''''
Select Case ErrNum
Case C_ERR_NO_ERROR
'''''''''''''''''''''''''''''''''
' No error. The file is not open.
'''''''''''''''''''''''''''''''''
IsFileOpen = False

Case C_ERR_PERMISSION_DENIED
'''''''''''''''''''''''''''''''''
' Permission denied. The file is
' open.
'''''''''''''''''''''''''''''''''
IsFileOpen = True

Case Else
'''''''''''''''''''''''''''''''''
' We should never get here, but
' if we do, return True to be safe.
'''''''''''''''''''''''''''''''''
IsFileOpen = True

End Select

End Function
 
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T

Tony James

Hi

I am trying import a .csvfilewhich contains more than 65536 rows. I
created a macro to import and it is successfully importing with out a text
qualitfier. can any one help me how to import huge .CSVfiles to one excel
sheet?

If you are importing many records, using ADO and CopyFromRecordset
will be far quicker than using Line Input# and Split.
Could you give a sample of the first few lines of the csv file?
 

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