(PowerShell) 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 .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

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

$ftp = New-Object Chilkat.Ftp2

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

# Connect and login to the FTP server.
$success = $ftp.Connect()
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

# Set the current remote directory to where the file is located:
$success = $ftp.ChangeRemoteDir("something")
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

# Test to see if the file exists by getting the file size by name. 
# If a -1 is returned, the file does not exist.
$fileSize = $ftp.GetSizeByName("test123.txt")
if ($fileSize -lt 0) {
    $("file does not exist")
}
else {
    $("file exists and is " + $fileSize + " bytes in size")
}

$success = $ftp.Disconnect()