How to exit gracefully closing open excel file on error? - excel

Question

I use dos .bat file to run a .vbs file continuously ... If any error occurs the batch file runs the vbscript again and it goes on. The script connects via internet to a site to execute some api calls.
Now when there is connection problem or any other error then the control comes out of the script keeping the excel file open. This way many excel files gets open on each error ... The code is as follows ... please advice me how to close the excel file on error and then come out of the script gracefully.
'{{{{Some coding}}}}
dim objExcel, objWorkbook, objRange
Set objExcel = CreateObject("Excel.Application")
Set objWorkbook = objExcel.Workbooks.Open("C:\temp.xlsx")
objExcel.Visible = True
'{{{{Some coding}}}}
objExcel.Cells(xlrow, 3).Value="Test"
objExcel.Cells(xlrow, 3).Select
objExcel.Activecell.Show
'{{{{Some coding}}}}
objExcel.Workbooks(1).save
objExcel.Workbooks(1).close
objExcel.Quit
Set objExcel = Nothing
Set objWorkbook = Nothing
WScript.Quit
Thanks in advance

Answer 1

One possible approach is to wrap the Excel handling in a custom class:
Class Excel
Private xl
Private Sub Class_Initialize
Set xl = CreateObject("Excel.Application")
End Sub
Private Sub Class_Terminate
For Each wb In xl.Workbooks
wb.Saved = True 'discard unsaved changes
wb.Close 'close workbook
Next
xl.Quit 'quit Excel
End Sub
Public Function OpenWorkbook(filename)
Set OpenWorkbook = xl.Workbooks.Open(filename)
End Function
Public Function NewWorkbook
Set NewWorkbook = xl.Workbooks.Add
End Function
Public Property Get Workbooks
Set Workbooks = xl.Workbooks
End Property
End Class
The procedure Class_Terminate is automatically called whenever a class instance is destroyed. That way you can automatically close the open workbooks and quit Excel.
The class can be used like this:
Set xl = New Excel
Set wb = xl.OpenWorkbook("C:\path\to\your.xlsx")
...
wb.Close