(Visual Basic 6.0) File Existence Check

Testing to see if a file exists on the FTP server. The GetSizeByName method is a convenient way to check if a file exists. It will return -1 if the file does not exist, otherwise it returns the size of the file in bytes.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim ftp As New ChilkatFtp2

ftp.Hostname = "ftp.example.com"
ftp.Username = "username"
ftp.Password = "password"

' Connect and login to the FTP server.
Dim success As Long
success = ftp.Connect()
If (success <> 1) Then
    Debug.Print ftp.LastErrorText
    Exit Sub
End If

' Set the current remote directory to where the file is located:
success = ftp.ChangeRemoteDir("something")
If (success <> 1) Then
    Debug.Print ftp.LastErrorText
    Exit Sub
End If

' Test to see if the file exists by getting the file size by name. 
' If a -1 is returned, the file does not exist.
Dim fileSize As Long
fileSize = ftp.GetSizeByName("test123.txt")
If (fileSize < 0) Then
    Debug.Print "file does not exist"
Else
    Debug.Print "file exists and is " & fileSize & " bytes in size"
End If

success = ftp.Disconnect()