Get an FTP Listing Entry's Size as a String

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Demonstrates the Chilkat Ftp2.GetSizeStr method, which returns the size in bytes of a cached directory-listing entry as a decimal string. The only argument is a zero-based index.

Background: Returning the size as text sidesteps integer-width limits entirely, which is useful in languages without a convenient 64-bit type and whenever you only need to display or log the value. Parse the string when you need to do arithmetic on it; otherwise it is ready to print as-is.

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bool success = false;

//  Demonstrates the Ftp2.GetSizeStr method, which returns the size in bytes of a cached
//  directory-listing entry as a decimal string.  The only argument is a zero-based index.

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;
}

//  GetDirCount retrieves the directory listing on the first call and returns the number of
//  entries.  A negative return indicates failure.
int n = ftp.GetDirCount();
if (n < 0) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}

int i;
for (i = 0; i <= n - 1; i++) {
    string name = ftp.GetFilename(i);

    //  The string form avoids integer-size limits in languages without a convenient 64-bit type.
    string fileSize = ftp.GetSizeStr(i);
    Debug.WriteLine(name + "  " + fileSize + " bytes");
}

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