PowerBuilder

File Existence Check

See more FTP Examples

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. PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Ftp
integer li_FileSize

li_Success = 0

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

loo_Ftp = create oleobject
li_rc = loo_Ftp.ConnectToNewObject("Chilkat.Ftp2")
if li_rc < 0 then
    destroy loo_Ftp
    MessageBox("Error","Connecting to COM object failed")
    return
end if

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

// Connect and login to the FTP server.
li_Success = loo_Ftp.Connect()
if li_Success <> 1 then
    Write-Debug loo_Ftp.LastErrorText
    destroy loo_Ftp
    return
end if

// Set the current remote directory to where the file is located:
li_Success = loo_Ftp.ChangeRemoteDir("something")
if li_Success <> 1 then
    Write-Debug loo_Ftp.LastErrorText
    destroy loo_Ftp
    return
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.
li_FileSize = loo_Ftp.GetSizeByName("test123.txt")
if li_FileSize < 0 then
    Write-Debug "file does not exist"
else
    Write-Debug "file exists and is " + string(li_FileSize) + " bytes in size"
end if

li_Success = loo_Ftp.Disconnect()


destroy loo_Ftp