(MFC) Directory Existence Check

How to test if a directory exists on an FTP server.

A good way to check to see if a directory already exists is to try to "cd" to that remote directory by calling ChangeRemoteDir. If it succeeds, then the directory exists. If not, then it does not exist. An alternative method is to set the ListPattern = "*" and then iterate over the files/directories, looking for the directory.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkFtp2.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkFtp2 ftp;

    ftp.put_Hostname("ftp.example.com");
    ftp.put_Username("login");
    ftp.put_Password("password");

    // Connect and login to the FTP server.
    bool success = ftp.Connect();
    if (success != true) {
        strOut.append(ftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Does the "temp" directory exist?
    bool dirExists;
    dirExists = ftp.ChangeRemoteDir("/temp");
    if (dirExists == true) {
        strOut.append("Yes, the temp directory exists.");
        strOut.append("\r\n");
        //  Yes, it exists. Restore the current remote dir:
        success = ftp.ChangeRemoteDir("..");
        if (success != true) {
            strOut.append(ftp.lastErrorText());
            strOut.append("\r\n");
            SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
            return;
        }

    }

    // Alternatively, you may set the ListPattern = "*" and 
    //  look for the directory:
    ftp.put_ListPattern("*");

    int i;
    int n;
    n = ftp.GetDirCount();
    if (n < 0) {
        // Failed to get directory listing based on ListPattern
        strOut.append(ftp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    if (n > 0) {
        for (i = 0; i <= n - 1; i++) {
            bool isDir;
            isDir = ftp.GetIsDirectory(i);
            if (isDir == true) {
                const char *fname = 0;
                fname = ftp.getFilename(i);
                if (fname == "temp") {
                    strOut.append("Found temp directory!");
                    strOut.append("\r\n");
                    success = ftp.Disconnect();
                    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
                    return;
                }

            }

        }

    }

    success = ftp.Disconnect();


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }