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(Unicode C) File Existence CheckTesting 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.
#include <C_CkFtp2W.h> void ChilkatSample(void) { HCkFtp2W ftp; BOOL success; int fileSize; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. ftp = CkFtp2W_Create(); CkFtp2W_putHostname(ftp,L"ftp.example.com"); CkFtp2W_putUsername(ftp,L"username"); CkFtp2W_putPassword(ftp,L"password"); // Connect and login to the FTP server. success = CkFtp2W_Connect(ftp); if (success != TRUE) { wprintf(L"%s\n",CkFtp2W_lastErrorText(ftp)); CkFtp2W_Dispose(ftp); return; } // Set the current remote directory to where the file is located: success = CkFtp2W_ChangeRemoteDir(ftp,L"something"); if (success != TRUE) { wprintf(L"%s\n",CkFtp2W_lastErrorText(ftp)); CkFtp2W_Dispose(ftp); return; } // 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 = CkFtp2W_GetSizeByName(ftp,L"test123.txt"); if (fileSize < 0) { wprintf(L"file does not exist\n"); } else { wprintf(L"file exists and is %d bytes in size\n",fileSize); } success = CkFtp2W_Disconnect(ftp); CkFtp2W_Dispose(ftp); } |
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