Need some help with error handling

I have an application that opens several files.
It has to check if that file resides in the specified directory.
Also it has to check if there is any data in the file.
If not, it has to rise approprite messages. How can I accomplish this?

thanks for any suggestions

One solution would be to use the Dir Function. This function returns the filename if the file exists, and an empty string if it does not.

Dim sFileName as string
sFileName = Dir("C:\Windows\Desktop\MyFile.txt")
If sFileName = vbNullString then
'The file does not exist, raise an error
Err.Raise ERROR_NO_FILE 'Define this error number
else
'Open the file
'Depending on your choice for access
'Check for EOF and BOF and set a boolean
'to indicate no data
If bNoData then
Err.Raise ERROR_NO_DATA
else
'Read and process the file
End If
'Close the file
End If

I would suggest using the FileSystemObject:

Sub Main()
'set a reference to the Microsoft Scripting Runtime
Dim fso as scripting.filesystemobject
dim filer as scripting.textstream

set fso = new scripting.filesystemobject

if fso.fileexists("C:\yourfile.txt") then
set filer = fso.opentextfile("C:\yourfile.txt",ForReading,false)
else
msgbox "File does not exist."
goto ExitRoute
end if

if filer.atendofstream then
msgbox "File is empty."
end if

ExitRoute:
on error resume next
filer.close
set filer = nothing
set fso = nothing
End Sub




That should do it for you.

John

John Pirkey
MCSD
www.ShallowWaterSystems.com