CopyFile Vbscript - join

Question

I need to join any files (2GB) without read their content. I have tried to use CopyFile method but it doesn't work.
My code is that:
Public Function UnificarCRIs(ByVal path, ByVal FICRIEC, ByVal sessio, ByVal CIBAA)
Dim objFile, objCurrentFolder, filesys, origenFitxers
Dim FileName, WshShell
On error resume next
Set filesys = CreateObject("Scripting.FileSystemObject")
Set WshShell = WScript.CreateObject("WScript.Shell")
Set objCurrentFolder = filesys.getFolder(path)
origenFitxers = " "
For Each objFile In objCurrentFolder.Files
FileName = objFile
If (right(FileName, 4) = ".cri") Then
origenFitxers = FileName
'Wscript.Echo FileName
If filesys.FileExists(path & FICRIEC & sessio) Then
'Wscript.Echo "If"
Wscript.Echo path & FICRIEC & sessio & "+" & FileName
filesys.CopyFile path & FICRIEC & sessio & "+" & FileName, path & FICRIEC & sessio
'WshShell.Run ("copy " & path & FICRIEC & sessio & "+" & FileName & " " & path & FICRIEC & sessio & "_tmp")
'filesys.DeleteFile path & FICRIEC & sessio
'filesys.MoveFile path & FICRIEC & sessio & "_tmp", path & FICRIEC & sessio
Else
Wscript.Echo "Else"
WshShell.Run ("copy " & FileName & " " & path & FICRIEC & sessio)
'filesys.CopyFile FileName,path & FICRIEC & sessio
End If
End If
Next
End Function
Are there some way to join two files using Vbscript?
Thanks

Answer 1

To join two files, 'someone' has to to read (and write) the contents of both files. This 'someone' could be copy [/B] f1 + f2 f3. So use your loop to build the correct file specs and WshShell.Run/.Exec the suitabe commands.

Answer 2

Depends which COM objects you have access to and where the code is running.
1) If you have access to the Shell, then use the copy command of the DOS prompt. This example shows the excecution of the Dir command but it's the same technique.
Dim oShell
Set oShell = WScript.CreateObject ("WScript.Shell")
' Note the True value means wait to complete...
' And the 0 value means do not display any window...
oShell.run "cmd /K CD C:\ & Dir", 0, True
Set oShell = Nothing
And maybe also take a look here http://ss64.com/vb/shellexecute.html. Don't know if that method will help.
2) If you have no shell then if you can make COM objects then make one with C++ or Delphi or VB6 etc. Then use that COM object to execute the DOS command to do the merging.
3) Otherwise you will have to read the data from the file. If it is text files then that is easy because there are simple commands to do that with in the Vbs. If it is binary data then that requires more work to get at the binary data and use the "LenB" and "AscB" style functions to access the raw bytes of the Unicode. But you really do not want to do that.
Any upload handling script for ASP should show you the technique for working with raw bytes from the strings.

Answer 3

You can combine VBScript with Windows Copy command to join files.
You can see the document on appending binary files using Copy here
https://support.microsoft.com/en-us/kb/71161
Here's the example of the technique:
JoinFiles "c:\test\", "c:\test\mergedfile.cri"
Function JoinFiles (inPath, outPath)
Dim objShell, objFSO
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objShell = WScript.CreateObject("WScript.Shell")
Dim strFilenames, objFile, intFilecount, intExitCode
strFilenames = ""
intFilecount = 0
intExitCode = 0
' If the input folder exists, proceed to listing the files
If objFSO.FolderExists (inPath) Then
' List the files in the folder and join the files which has cri extension
For Each objFile In objFSO.GetFolder(inPath).Files
If LCase (objFSO.GetExtensionName (objFile.Path)) = "cri" Then
intFilecount = intFilecount+1
strFilenames = strFilenames & """" & objFile.Path & """ + "
End If
Next
' If there're more than one file, proceed to join the file
If (intFilecount > 1) Then
' join the files. Remove the last 3 characters from strFilenames (" + ").
intExitCode = objShell.Run ("%COMSPEC% /C COPY /B " & Left (strFilenames, Len (strFilenames)-3) _
& " """ & outPath & """ /Y", 0, True)
Else
' Not enough file to join
End If
Else
' Can't find folder, exit.
End If
End Function