Excel objects

K

kgoodyear

I am creating and using an Excel object and saving the results to an
spreadsheet file. This all works fine except there is an object left
out in cyber space that is hidden even from the task manager. The
only time they show up is when one reboots the computer and then you
are prompted to save the file. Does anyone know how to remove these
phantom objects from memory programatically?
 
N

Norman Yuan

Something in your Excel automation code is not correct. You must release all
objects in Excel object model and quit the Excel application in your code.
This is very common topic related to Excel automation. Without seeing your
code, that all I can say.
 
K

kgoodyear

Something in your Excel automation code is not correct. You must release all
objects in Excel object model and quit the Excel application in your code..
This is very common topic related to Excel automation. Without seeing your
code, that all I can say.






- Show quoted text -

Thank you for your response.

Let me first say the only reason I found the objects out there was
because I had to warm boot my computer. Since I seldom reboot my
computer I detected them when I did and suspect they may have been
left over from my testing. That being said, I have included the
function I use. I am also looking for a more eligant way to assign my
column headers then the vebose list at the top of the function.

Private Sub CreateExcelReport()

Dim oExcel As Object
Dim oBook As Object
Dim oSheet As Object
Dim ssamplefolder = Me.pOutputPath
Dim strRange As String

Dim rowWork As DataRow
Dim i As Integer
Dim intRow As Integer
Dim intcol As Integer
Dim colWork As DataColumn
Dim htAlphabet As New Hashtable
Dim dtmSaveNow As DateTime = DateTime.Now
Dim dtpDatePatt As String = moConst.BIDateFormatting
Try
htAlphabet.Add(1, "A")
htAlphabet.Add(2, "B")
htAlphabet.Add(3, "C")
htAlphabet.Add(4, "D")
htAlphabet.Add(5, "E")
htAlphabet.Add(6, "F")
htAlphabet.Add(7, "G")
htAlphabet.Add(8, "H")
htAlphabet.Add(9, "I")
htAlphabet.Add(10, "J")
htAlphabet.Add(11, "K")
htAlphabet.Add(12, "L")
htAlphabet.Add(13, "M")
htAlphabet.Add(14, "N")
htAlphabet.Add(15, "O")
htAlphabet.Add(16, "P")
htAlphabet.Add(17, "Q")
htAlphabet.Add(18, "R")
htAlphabet.Add(19, "S")
htAlphabet.Add(20, "T")
htAlphabet.Add(21, "U")
htAlphabet.Add(22, "V")
htAlphabet.Add(23, "W")
htAlphabet.Add(24, "X")
htAlphabet.Add(25, "Y")
htAlphabet.Add(26, "Z")

'Start a new workbook in Excel.
oExcel = CreateObject("Excel.Application")
oBook = oExcel.Workbooks.Add
oSheet = oBook.Worksheets(1)
Using reader As New DataTableReader(Me.pReport)
For i = 0 To reader.FieldCount - 1
strRange = htAlphabet(i + 1) & 1.ToString
oSheet.Range(strRange).Value = reader.GetName(i)
oSheet.Range(strRange).Font.Bold = True
'MsgBox(reader.GetName(i) & " " &
reader.GetDataTypeName(i))
Next
End Using

i = 0

intRow = 2

For Each rowWork In Me.pReport.Rows
intRow += 1
intcol = 0
For Each colWork In Me.pReport.Columns
intcol += 1
strRange = htAlphabet(intcol) + intRow.ToString
oSheet.Range(strRange).Value = rowWork(colWork)
Next
Next

'Save the Workbook and quit Excel.
oBook.SaveAs(Me.pOutputPath & Me.pOutputName & "_" &
dtmSaveNow.ToString(dtpDatePatt) & ".xls")
NAR(oSheet)
NAR(oBook)
oExcel.Quit()
NAR(oExcel)
GC.Collect()
Catch ex As Exception

End Try

End Sub
Private Sub NAR(ByVal o As Object)
Try
System.Runtime.InteropServices.Marshal.ReleaseComObject(o)
Catch
Finally
o = Nothing
End Try
End Sub
 
N

Norman Yuan

Could try to add

oBook.Close

before

NAR(oSheet)
NAR(oBook)

I suppect that before the workbook is closed,
System.Runtime.InteropServices.Marshal.ReleaseComObject() will not release
it.

Something in your Excel automation code is not correct. You must release
all
objects in Excel object model and quit the Excel application in your code.
This is very common topic related to Excel automation. Without seeing your
code, that all I can say.






- Show quoted text -

Thank you for your response.

Let me first say the only reason I found the objects out there was
because I had to warm boot my computer. Since I seldom reboot my
computer I detected them when I did and suspect they may have been
left over from my testing. That being said, I have included the
function I use. I am also looking for a more eligant way to assign my
column headers then the vebose list at the top of the function.

Private Sub CreateExcelReport()

Dim oExcel As Object
Dim oBook As Object
Dim oSheet As Object
Dim ssamplefolder = Me.pOutputPath
Dim strRange As String

Dim rowWork As DataRow
Dim i As Integer
Dim intRow As Integer
Dim intcol As Integer
Dim colWork As DataColumn
Dim htAlphabet As New Hashtable
Dim dtmSaveNow As DateTime = DateTime.Now
Dim dtpDatePatt As String = moConst.BIDateFormatting
Try
htAlphabet.Add(1, "A")
htAlphabet.Add(2, "B")
htAlphabet.Add(3, "C")
htAlphabet.Add(4, "D")
htAlphabet.Add(5, "E")
htAlphabet.Add(6, "F")
htAlphabet.Add(7, "G")
htAlphabet.Add(8, "H")
htAlphabet.Add(9, "I")
htAlphabet.Add(10, "J")
htAlphabet.Add(11, "K")
htAlphabet.Add(12, "L")
htAlphabet.Add(13, "M")
htAlphabet.Add(14, "N")
htAlphabet.Add(15, "O")
htAlphabet.Add(16, "P")
htAlphabet.Add(17, "Q")
htAlphabet.Add(18, "R")
htAlphabet.Add(19, "S")
htAlphabet.Add(20, "T")
htAlphabet.Add(21, "U")
htAlphabet.Add(22, "V")
htAlphabet.Add(23, "W")
htAlphabet.Add(24, "X")
htAlphabet.Add(25, "Y")
htAlphabet.Add(26, "Z")

'Start a new workbook in Excel.
oExcel = CreateObject("Excel.Application")
oBook = oExcel.Workbooks.Add
oSheet = oBook.Worksheets(1)
Using reader As New DataTableReader(Me.pReport)
For i = 0 To reader.FieldCount - 1
strRange = htAlphabet(i + 1) & 1.ToString
oSheet.Range(strRange).Value = reader.GetName(i)
oSheet.Range(strRange).Font.Bold = True
'MsgBox(reader.GetName(i) & " " &
reader.GetDataTypeName(i))
Next
End Using

i = 0

intRow = 2

For Each rowWork In Me.pReport.Rows
intRow += 1
intcol = 0
For Each colWork In Me.pReport.Columns
intcol += 1
strRange = htAlphabet(intcol) + intRow.ToString
oSheet.Range(strRange).Value = rowWork(colWork)
Next
Next

'Save the Workbook and quit Excel.
oBook.SaveAs(Me.pOutputPath & Me.pOutputName & "_" &
dtmSaveNow.ToString(dtpDatePatt) & ".xls")
NAR(oSheet)
NAR(oBook)
oExcel.Quit()
NAR(oExcel)
GC.Collect()
Catch ex As Exception

End Try

End Sub
Private Sub NAR(ByVal o As Object)
Try
System.Runtime.InteropServices.Marshal.ReleaseComObject(o)
Catch
Finally
o = Nothing
End Try
End Sub
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top