Count Files in a Remote FTP Directory

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Demonstrates the Chilkat Ftp2.GetDirCount method, which returns the number of files and directories in the current remote directory. It takes no arguments; the first call retrieves the listing, and the count reflects the case-insensitive ListPattern filter. A negative return indicates failure.

Background: GetDirCount is the entry point to Chilkat's index-based directory API: its first call fetches the listing for the current directory into a cache, and the returned count establishes the valid index range (0 through count - 1) for the accessor methods that read names, sizes, and attributes. The ListPattern property narrows the listing to matching names before counting, which is how you list, say, only *.html without filtering in your own code.

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bool success = false;

//  Demonstrates the Ftp2.GetDirCount method, which returns the number of files and directories in
//  the current remote directory's listing.  It takes no arguments.  The first call retrieves the
//  listing; the count reflects the case-insensitive ListPattern filter.

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;
}

//  Optionally filter the listing with a wildcard pattern.  "*" (the default) matches everything.
ftp.ListPattern = "*.html";

int n = ftp.GetDirCount();
if (n < 0) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}

Debug.WriteLine("Matching entries: " + Convert.ToString(n));

//  The count defines the valid index range 0 through n-1 for the indexed accessor methods.
int i;
for (i = 0; i <= n - 1; i++) {
    string name = ftp.GetFilename(i);
    Debug.WriteLine(name);
}

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