Get a Remote FTP File's Size by Name as a String

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Demonstrates the Chilkat Ftp2.GetSizeStrByName method, which returns the size in bytes of a named file in the current remote directory as a decimal string. The only argument is the filename.

Background: Returning the size as text avoids integer-width limits entirely, so this is the safe choice for a file of any size and for languages without a convenient large-integer type. Like the other by-name lookups it takes a bare filename in the current directory; parse the string when you need arithmetic, or use it directly for display.

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bool success = false;

//  Demonstrates the Ftp2.GetSizeStrByName method, which returns the size in bytes of a named file
//  in the current remote directory as a decimal string.  The only argument is the filename.

Chilkat.Ftp2 ftp = new Chilkat.Ftp2();

ftp.Hostname = "ftp.example.com";
ftp.Username = "myFtpLogin";

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
ftp.Password = "myPassword";

success = ftp.Connect();
if (success == false) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}

success = ftp.ChangeRemoteDir("public_html");
if (success == false) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}

//  The string form avoids integer-size limits, so it is safe for files of any size.
string fileSize = ftp.GetSizeStrByName("bigfile.zip");
if (ftp.LastMethodSuccess == false) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}

Debug.WriteLine("bigfile.zip is " + fileSize + " bytes");

success = ftp.Disconnect();
if (success == false) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}