/// <summary> /// Windows Embedded CE 6.0 R3 WinInet Functions /// https://technet.microsoft.com/zh-cn/aa914184 /// Windows WinINet Functions /// https://technet.microsoft.com/zh-cn/windows/aa385473(v=vs.71) /// /// </summary> public class NetUtil { [DllImport("wininet.dll")] private extern static bool InternetGetConnectedState(int Description, int ReservedValue); /// <summary> /// 用于检查网络是否可以连接互联网,true表示连接成功,false表示连接失败 /// </summary> /// <returns></returns> public static bool IsConnectInternet() { int Description = 0; return InternetGetConnectedState(Description, 0); } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public class WIN32_FIND_DATA { public UInt32 dwFileAttributes = 0; public FILETIME ftCreationTme; public FILETIME ftLastAccessTime; public FILETIME ftLastWriteTime; public UInt32 nFileSizeHigh = 0; public UInt32 nFileSizeLow = 0; public UInt32 dwReserved0 = 0; public UInt32 dwReserved1 = 0; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)] public string cFileName = null; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 14)] public string cAlternateFileName = null; }; [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public class FILETIME { public int dwLowDateTime = 0; public int dwHighDateTime = 0; }; //以下是对WININET.DLL中的重要函数的托管转换 [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool InternetGetLastResponseInfo(ref uint ulError, [MarshalAs(UnmanagedType.LPTStr)] string strBuffer, ref uint ulBufferLength); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern IntPtr InternetOpen(string strAppName, ulong ulAccessType, string strProxy, string strProxyBypass, ulong ulFlags); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool InternetFindNextFile(IntPtr hFind, [In, Out] WIN32_FIND_DATA dirData); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern IntPtr InternetConnect(IntPtr ulSession, string strServer, uint ulPort, string strUser, string strPassword, uint ulService, uint ulFlags, uint ulContext); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool InternetGetConnectedState(ref uint ulFlags, uint ulReserved); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool FtpSetCurrentDirectory(IntPtr ulSession, string strPath); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern IntPtr FtpFindFirstFile(IntPtr ulSession, string strPath , [In, Out] WIN32_FIND_DATA dirData, ulong ulFlags, ulong ulContext); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool FtpGetFile(IntPtr ulSession, string strRemoteFile, string strLocalFile, bool bolFailIfExist, ulong ulFlags, ulong ulInetFals, ulong ulContext); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool FtpPutFile(IntPtr ulSession, string strLocalFile, string strRemoteFile, ulong ulFlags, ulong ulContext); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool FtpDeleteFile(IntPtr ulSession, string strFileName); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool InternetCloseHandle(IntPtr ulSession); /// <summary> //STRUCTURE to hold the directory information - implemented as a class /// <summary> [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public class FileData { public int fileAttributes = 0; // creationTime was embedded FILETIME structure public int creationTime_lowDateTime = 0; public int creationTime_highDateTime = 0; // lastAccessTime was embedded FILETIME structure public int lastAccessTime_lowDateTime = 0; public int lastAccessTime_highDateTime = 0; // lastWriteTime was embedded FILETIME structure public int lastWriteTime_lowDateTime = 0; public int lastWriteTime_highDateTime = 0; public int nFileSizeHigh = 0; public int nFileSizeLow = 0; public int dwReserved0 = 0; public int dwReserved1 = 0; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)] public String fileName = null; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 14)] public String alternateFileName = null; } //end of class FileDate /// <summary> /// Class FtpDll implements the 'wininet.dll' api for FTP connection over firewalls! /// </summary> public class FtpDll { //DECLARATIONS [DllImport("kernel32.dll", CharSet = CharSet.Auto)] public static extern uint SetLastError(uint uiErrorCode); [DllImport("kernel32.dll", CharSet = CharSet.Auto)] public static extern uint GetLastError(); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool InternetGetLastResponseInfo(ref uint ulError, [MarshalAs(UnmanagedType.LPTStr)] string strBuffer, ref uint ulBufferLength); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern IntPtr InternetOpen(string strAppName, ulong ulAccessType, string strProxy, string strProxyBypass, ulong ulFlags); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern IntPtr InternetConnect(IntPtr ulSession, string strServer, uint ulPort, string strUser, string strPassword, uint ulService, uint ulFlags, uint ulContext); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool InternetGetConnectedState(ref uint ulFlags, uint ulReserved); // [DllImport("wininet.dll", CharSet = CharSet.Auto)] // public static extern bool FtpGetCurrentDirectory(IntPtr ulSession, string strPath, ulong ulBuffLength); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool FtpSetCurrentDirectory(IntPtr ulSession, string strPath); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern IntPtr FtpFindFirstFile(IntPtr ulSession, string strPath, [In, Out] FileData dirData, ulong ulFlags, ulong ulContext); //returns handle for InternetFindNextFile // [DllImport("wininet.dll", CharSet = CharSet.Auto)] // public static extern bool InternetFindNextFile(ulong ulFindFirst, [In, Out] FileData dirData); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool FtpGetFile(IntPtr ulSession, string strRemoteFile, string strLocalFile, bool bolFailIfExist, ulong ulFlags, ulong ulInetFals, ulong ulContext); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool FtpPutFile(IntPtr ulSession, string strLocalFile, string strRemoteFile, ulong ulFlags, ulong ulContext); // [DllImport("wininet.dll", CharSet = CharSet.Auto)] // public static extern bool FtpRenameFile(IntPtr ulSession, string strExisting, string strNew); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool FtpDeleteFile(IntPtr ulSession, string strFileName); [DllImport("wininet.dll", CharSet = CharSet.Auto)] public static extern bool InternetCloseHandle(IntPtr ulSession); //CONSTANTS - there are plenty more of these, only the important ones are here! //InternetOpen:aul_AccessType flags public const uint OPEN_TYPE_PRECONFIG = 0; public const uint OPEN_TYPE_DIRECT = 1; public const uint OPEN_TYPE_GATEWAY = 2; public const uint OPEN_TYPE_PROXY = 3; //Ports public const uint INVALID_PORT_NUMBER = 0; public const uint DEFAULT_FTP_PORT = 21; public const uint DEFAULT_GOPHER_PORT = 70; public const uint DEFAULT_HTTP_PORT = 80; public const uint DEFAULT_HTTPS_PORT = 443; public const uint DEFAULT_SOCKS_PORT = 1080; //Service/Command types public const uint SERVICE_FTP = 1; public const uint SERVICE_GOPHER = 2; public const uint SERVICE_HTTP = 3; //Internet connection flags public const uint CONNECTION_MODEM = 1; public const uint CONNECTION_LAN = 2; public const uint CONNECTION_PROXY = 4; public const uint CONNECTION_MODEM_BUSY = 8; //FTP transfer flags public const uint FTP_TRANSFER_TYPE_ASCII = 1; public const uint FTP_TRANSFER_TYPE_BINARY = 2; //VARIABLES IntPtr hInternetSession = new IntPtr(0); //handle to the Internet session IntPtr hInternetConnection = new IntPtr(0); //handle to the Internet connection uint intErrorValue = 0; //error value string strErrorText = ""; FileData myFileData; bool bolDebug = true; public FtpDll() { //constructor myFileData = new FileData(); //instance the FileData class to hold the dir info } public void funIOpen() { string strProxy = ""; string strProxyBypass = ""; try { funClearError(); //clear the 'last error' value hInternetSession = FtpDll.InternetOpen("FTPTest", FtpDll.OPEN_TYPE_DIRECT, strProxy, strProxyBypass, 0); if (funGetError()) { if (intErrorValue != 127) //hum... seem to always get 127 back!?! throw new Exception("funIOpen failed, error value: " + intErrorValue + " - " + strErrorText); } } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); throw e; //pass this exception back to the caller } } public bool funIConnected() { //check if we are connected bool bolOnLine = false; try { if (hInternetConnection != IntPtr.Zero) { //we have an internet connection handle uint uintFlags = 0; funClearError(); //clear the 'last error' value FtpDll.InternetGetConnectedState(ref uintFlags, 0); //ask for the connection status //if (uintFlags & FtpDll.CONNECTION_LAN > 0) //so long as we have a connection value... if (uintFlags > 0) //so long as we have a connection value... bolOnLine = true; if (funGetError()) throw new Exception("funIConnected failed, error value: " + intErrorValue + " - " + strErrorText); } else throw new Exception("funIConnected failed; need to establish an Internet session first!"); } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); throw e; //pass this exception back to the caller } return bolOnLine; } public void funIConnect() { //connect using default values try { string strHostURL = "ftp.microsoft.com"; string strUser = "anonymous"; string strPW = "fred@test.com"; funIConnect(strHostURL, strUser, strPW); } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); throw e; //pass this exception back to the caller } } public void funIConnect(string strHostURL, string strUser, string strPW) { if (hInternetSession == IntPtr.Zero) funIOpen(); //we always need a session first try { funClearError(); //make sure we are clean before starting to connect hInternetConnection = FtpDll.InternetConnect(hInternetSession, strHostURL, FtpDll.DEFAULT_FTP_PORT, strUser, strPW, FtpDll.SERVICE_FTP, 0, 0); if (funGetError()) throw new Exception("funIConnect failed, error value: " + intErrorValue + " - " + strErrorText); if (hInternetConnection == IntPtr.Zero) //if the handle is still zero.... throw new Exception("Failed to get a handle in funIConnect - no error code given!"); } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); throw e; //pass this exception back to the caller } } public void funFTPChangeDir(string strDir) { try { if (!funIConnected()) throw new Exception("Please connect to FTP host first!"); funClearError(); //clear the 'last error' value FtpDll.FtpSetCurrentDirectory(hInternetConnection, strDir); if (funGetError()) throw new Exception("funFTPChangeDir failed, error value: " + intErrorValue + " - " + strErrorText); } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); throw e; //pass this exception back to the caller } } public string funFTPFirstFile(string strPath) { string strFileName = ""; try { if (!funIConnected()) throw new Exception("Please connect to FTP host first!"); funClearError(); //clear the 'last error' value FtpDll.FtpFindFirstFile(hInternetConnection, strPath, myFileData, 0, 0); if (funGetError()) throw new Exception("funFTPFirstFile failed, error value: " + intErrorValue + " - " + strErrorText); strFileName = myFileData.fileName; } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); throw e; //pass this exception back to the caller } return strFileName; } public void funFTPGetFile(string strRemoteFile, string strLocalFile) { try { if (!funIConnected()) throw new Exception("Please connect to FTP host first!"); funClearError(); //clear the 'last error' value FtpDll.FtpGetFile(hInternetConnection, strRemoteFile, strLocalFile, false, 0, 0, 0); if (funGetError()) throw new Exception("funFTPGet failed, error value: " + intErrorValue + " - " + strErrorText); } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); throw e; //pass this exception back to the caller } } public void funFTPPutFile(string strLocalFile, string strRemoteFile) { try { if (!funIConnected()) throw new Exception("Please connect to FTP host first!"); funClearError(); //clear the 'last error' value FtpDll.FtpPutFile(hInternetConnection, strLocalFile, strRemoteFile, 0, 0); if (funGetError()) throw new Exception("funFTPPut failed, error value: " + intErrorValue + " - " + strErrorText); } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); throw e; //pass this exception back to the caller } } public void funFTPDeleteFile(string strFileName) { try { if (!funIConnected()) throw new Exception("Please connect to FTP host first!"); funClearError(); //clear the 'last error' value FtpDll.FtpDeleteFile(hInternetConnection, strFileName); if (funGetError()) { if (intErrorValue == 2) { //special case? the function seems otherwise OK?!?!?! if (bolDebug) Console.WriteLine("funFTPDeleteFile succeeded, but returned an error code 2 - ignored!"); } else throw new Exception("funFTPDeleteFile failed, error value: " + intErrorValue + " - " + strErrorText); } } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); throw e; //pass this exception back to the caller } } public void funFTPDisconnect() { if (hInternetSession != IntPtr.Zero) { //if and only if we have a session... try { funClearError(); //clear the 'last error' value FtpDll.InternetCloseHandle(hInternetSession); if (funGetError()) throw new Exception("funFTPDisconnect failed, error value: " + intErrorValue + " - " + strErrorText); } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); throw e; //pass this exception back to the caller } } hInternetSession = IntPtr.Zero; //reset this handle? } public void funClearError() { //clear the 'last error' value FtpDll.SetLastError(0); } public bool funGetError() { //return true if an error found intErrorValue = FtpDll.GetLastError(); switch (intErrorValue) { case 127: //ERROR_PROC_NOT_FOUND strErrorText = "The specified procedure could not be found."; break; case 2: //ERROR_FILE_NOT_FOUND strErrorText = "The system cannot find the file specified."; break; case 18: //ERROR_NO_MORE_FILES strErrorText = "There are no more files."; break; case 123: //ERROR_INVALID_NAME strErrorText = "The filename, directory name, or volume label syntax is incorrect."; break; case 12003: //ERROR_INTERNET_EXTENDED_ERROR try { string strExtErrorText = "";//to hold the ExtErrorText uint uiExtErrorTextLength = 0;//start as zero length FtpDll.InternetGetLastResponseInfo(ref intErrorValue, strExtErrorText, ref uiExtErrorTextLength); if (uiExtErrorTextLength > 0) {//indicasting the length of the message to collect strExtErrorText += new string(' ', (int)uiExtErrorTextLength);//beef up the string buffer FtpDll.InternetGetLastResponseInfo(ref intErrorValue, strExtErrorText, ref uiExtErrorTextLength); if (uiExtErrorTextLength > 0) strErrorText = "The server has returned an extended error: " + strExtErrorText; else strErrorText = "The server has returned an extended error, but the text can not be recovered at all?!?."; } else strErrorText = "The server has returned an extended error, but the text can not be recovered!?."; } catch (Exception e) { if (bolDebug) Console.WriteLine(e.Message); } break; case 12111: //ERROR_FTP_DROPPED strErrorText = "The FTP operation was not completed because the session was aborted."; break; case 12110: //ERROR_FTP_TRANSFER_IN_PROGRESS strErrorText = "The requested operation cannot be made on the FTP session handle because an operation is already in progress."; break; case 12137: //ERROR_GOPHER_ATTRIBUTE_NOT_FOUND strErrorText = "The requested attribute could not be located."; break; case 12132: //ERROR_GOPHER_DATA_ERROR strErrorText = "An error was detected while receiving data from the Gopher server."; break; case 12133: //ERROR_GOPHER_END_OF_DATA strErrorText = "The end of the data has been reached."; break; case 12135: //ERROR_GOPHER_INCORRECT_LOCATOR_TYPE strErrorText = "The type of the locator is not correct for this operation."; break; case 12134: //ERROR_GOPHER_INVALID_LOCATOR strErrorText = "The supplied locator is not valid."; break; case 12131: //ERROR_GOPHER_NOT_FILE strErrorText = "The request must be made for a file locator."; break; case 12136: //ERROR_GOPHER_NOT_GOPHER_PLUS strErrorText = "The requested operation can only be made against a Gopher+ server, or with a locator that specifies a Gopher+ operation."; break; case 12130: //ERROR_GOPHER_PROTOCOL_ERROR strErrorText = "An error was detected while parsing data returned from the Gopher server."; break; case 12138: //ERROR_GOPHER_UNKNOWN_LOCATOR strErrorText = "The locator type is unknown."; break; case 12151: //ERROR_HTTP_DOWNLEVEL_SERVER strErrorText = "The server did not return any headers."; break; case 12155: //ERROR_HTTP_HEADER_ALREADY_EXISTS strErrorText = "The header could not be added because it already exists."; break; case 12150: //ERROR_HTTP_HEADER_NOT_FOUND strErrorText = "The requested header could not be located."; break; case 12153: //ERROR_HTTP_INVALID_HEADER strErrorText = "The supplied header is invalid."; break; case 12154: //ERROR_HTTP_INVALID_QUERY_REQUEST strErrorText = "The request made to HttpQueryInfo is invalid."; break; case 12156: //ERROR_HTTP_REDIRECT_FAILED strErrorText = "The redirection failed because either the scheme changed (HTTP to FTP) or all attempts made to redirect failed."; break; case 12168: //ERROR_HTTP_REDIRECT_NEEDS_CONFIRMATION strErrorText = "The redirection requires user confirmation."; break; case 12152: //ERROR_HTTP_INVALID_SERVER_RESPONSE strErrorText = "The server response could not be parsed."; break; case 12047: //ERROR_INTERNET_ASYNC_THREAD_FAILED strErrorText = "The application could not start an asynchronous thread."; break; case 12010: //ERROR_INTERNET_BAD_OPTION_LENGTH strErrorText = "The length of an option supplied to InternetQueryOption or InternetSetOption is incorrect for the type of option specified."; break; case 12166: //ERROR_INTERNET_BAD_AUTO_PROXY_SCRIPT strErrorText = "There was an error in the automatic proxy configuration script."; break; case 12022: //ERROR_INTERNET_BAD_REGISTRY_PARAMETER strErrorText = "A required registry value was located but is an incorrect type or has an invalid value."; break; case 12029: //ERROR_INTERNET_CANNOT_CONNECT strErrorText = "The attempt to connect to the server failed."; break; case 12042: //ERROR_INTERNET_CHG_POST_IS_NON_SECURE strErrorText = "The application is posting and attempting to change multiple lines of text on a server that is not secure."; break; case 12044: //ERROR_INTERNET_CLIENT_AUTH_CERT_NEEDED strErrorText = "The server is requesting client authentication."; break; case 12046: //ERROR_INTERNET_CLIENT_AUTH_NOT_SETUP strErrorText = "Client authorization is not set up on this computer."; break; case 12030: //ERROR_INTERNET_CONNECTION_ABORTED strErrorText = "The connection with the server has been terminated."; break; case 12031: //ERROR_INTERNET_CONNECTION_RESET strErrorText = "The connection with the server has been reset."; break; case 12049: //ERROR_INTERNET_DIALOG_PENDING strErrorText = "Another thread has a password dialog in progress."; break; case 12163: //ERROR_INTERNET_DISCONNECTED strErrorText = "The Internet connection has been lost."; break; case 12171: //ERROR_INTERNET_FAILED_DUETOSECURITYCHECK strErrorText = "The function failed due to a security check."; break; case 12032: //ERROR_INTERNET_FORCE_RETRY strErrorText = "The Win32 Internet function needs to redo the request."; break; case 12036: //ERROR_INTERNET_HANDLE_EXISTS strErrorText = "The request failed because the handle already exists."; break; case 12039: //ERROR_INTERNET_HTTP_TO_HTTPS_ON_REDIR strErrorText = "The application is moving from a non-SSL to an SSL connection because of a redirect."; break; case 12040: //ERROR_INTERNET_HTTPS_TO_HTTP_ON_REDIR strErrorText = "The application is moving from an SSL to an non-SSL connection because of a redirect."; break; case 12027: //ERROR_INTERNET_INCORRECT_FORMAT strErrorText = "The format of the request is invalid."; break; case 12019: //ERROR_INTERNET_INCORRECT_HANDLE_STATE strErrorText = "The requested operation cannot be carried out because the handle supplied is not in the correct state."; break; case 12018: //ERROR_INTERNET_INCORRECT_HANDLE_TYPE strErrorText = "The type of handle supplied is incorrect for this operation."; break; case 12014: //ERROR_INTERNET_INCORRECT_PASSWORD strErrorText = "The request to connect and log on to an FTP server could not be completed because the supplied password is incorrect."; break; case 12013: //ERROR_INTERNET_INCORRECT_USER_NAME strErrorText = "The request to connect and log on to an FTP server could not be completed because the supplied user name is incorrect."; break; case 12053: //ERROR_INTERNET_INSERT_CDROM strErrorText = "The request requires a CD-ROM to be inserted in the CD-ROM drive to locate the resource requested."; break; case 12004: //ERROR_INTERNET_INTERNAL_ERROR strErrorText = "An internal error has occurred."; break; case 12045: //ERROR_INTERNET_INVALID_CA strErrorText = "The function is unfamiliar with the Certificate Authority that generated the server's certificate."; break; case 12016: //ERROR_INTERNET_INVALID_OPERATION strErrorText = "The requested operation is invalid."; break; case 12009: //ERROR_INTERNET_INVALID_OPTION strErrorText = "A request to InternetQueryOption or InternetSetOption specified an invalid option value."; break; case 12033: //ERROR_INTERNET_INVALID_PROXY_REQUEST strErrorText = "The request to the proxy was invalid."; break; case 12005: //ERROR_INTERNET_INVALID_URL strErrorText = "The URL is invalid."; break; case 12028: //ERROR_INTERNET_ITEM_NOT_FOUND strErrorText = "The requested item could not be located."; break; case 12015: //ERROR_INTERNET_LOGIN_FAILURE strErrorText = "The request to connect and log on to an FTP server failed."; break; case 12041: //ERROR_INTERNET_MIXED_SECURITY strErrorText = "The content is not entirely secure. Some of the content being viewed may have come from unsecured servers."; break; case 12007: //ERROR_INTERNET_NAME_NOT_RESOLVED strErrorText = "The server name could not be resolved."; break; case 12034: //ERROR_INTERNET_NEED_UI strErrorText = "A user interface or other blocking operation has been requested."; break; case 12025: //ERROR_INTERNET_NO_CALLBACK strErrorText = "An asynchronous request could not be made because a callback function has not been set."; break; case 12024: //ERROR_INTERNET_NO_CONTEXT strErrorText = "An asynchronous request could not be made because a zero context value was supplied."; break; case 12023: //ERROR_INTERNET_NO_DIRECT_ACCESS strErrorText = "Direct network access cannot be made at this time."; break; case 12020: //ERROR_INTERNET_NOT_PROXY_REQUEST strErrorText = "The request cannot be made via a proxy."; break; case 12017: //ERROR_INTERNET_OPERATION_CANCELLED strErrorText = "The operation was canceled, usually because the handle on which the request was operating was closed before the operation completed."; break; case 12011: //ERROR_INTERNET_OPTION_NOT_SETTABLE strErrorText = "The requested option cannot be set, only queried."; break; case 12001: //ERROR_INTERNET_OUT_OF_HANDLES strErrorText = "No more handles could be generated at this time."; break; case 12043: //ERROR_INTERNET_POST_IS_NON_SECURE strErrorText = "The application is posting data to a sever that is not secure."; break; case 12008: //ERROR_INTERNET_PROTOCOL_NOT_FOUND strErrorText = "The requested protocol could not be located."; break; case 12165: //ERROR_INTERNET_PROXY_SERVER_UNREACHABLE strErrorText = "The designated proxy server cannot be reached."; break; case 12048: //ERROR_INTERNET_REDIRECT_SCHEME_CHANGE strErrorText = "The function could not handle the redirection, because the scheme changed (HTTP to FTP)."; break; case 12021: //ERROR_INTERNET_REGISTRY_VALUE_NOT_FOUND strErrorText = "A required registry value could not be located."; break; case 12026: //ERROR_INTERNET_REQUEST_PENDING strErrorText = "The required operation could not be completed because one or more requests are pending."; break; case 12038: //ERROR_INTERNET_SEC_CERT_CN_INVALID strErrorText = "SSL certificate common name (host name field) is incorrect. eg if you entered www.server.com and the common name on the certificate says www.different.com."; break; case 12037: //ERROR_INTERNET_SEC_CERT_DATE_INVALID strErrorText = "SSL certificate date that was received from the server is bad. The certificate is expired."; break; case 12170: //ERROR_INTERNET_SEC_CERT_REVOKED strErrorText = "SSL certificate was revoked."; break; case 12169: //ERROR_INTERNET_SEC_INVALID_CERT strErrorText = "SSL certificate is invalid."; break; case 12157: //ERROR_INTERNET_SECURITY_CHANNEL_ERROR strErrorText = "The application experienced an internal error loading the SSL libraries."; break; case 12164: //ERROR_INTERNET_SERVER_UNREACHABLE strErrorText = "The Web site or server indicated is unreachable."; break; case 12012: //ERROR_INTERNET_SHUTDOWN strErrorText = "The Win32 Internet function support is being shut down or unloaded."; break; case 12159: //ERROR_INTERNET_TCPIP_NOT_INSTALLED strErrorText = "The required protocol stack is not loaded and the application cannot start WinSock."; break; case 12002: //ERROR_INTERNET_TIMEOUT strErrorText = "The request has timed out."; break; case 12158: //ERROR_INTERNET_UNABLE_TO_CACHE_FILE strErrorText = "The function was unable to cache the file."; break; case 12167: //ERROR_INTERNET_UNABLE_TO_DOWNLOAD_SCRIPT strErrorText = "The automatic proxy configuration script could not be downloaded. The INTERNET_FLAG_MUST_CACHE_REQUEST flag was set."; break; case 12006: //ERROR_INTERNET_UNRECOGNIZED_SCHEME strErrorText = "The URL scheme could not be recognized, or is not supported."; break; default: strErrorText = "Unknown error code: " + intErrorValue; break; } return (intErrorValue != 0); } } //end of class FtpDll /* try { TestFtpDll myTest = new TestFtpDll(); FtpDll myFtpDll = new FtpDll(); //instance the FtpDll class to access the FTP functions myFtpDll.funIOpen(); Console.WriteLine("Connecting..."); myFtpDll.funIConnect(); //use default connection parameters Console.WriteLine("Change dir to developr..."); myFtpDll.funFTPChangeDir("developr"); Console.WriteLine("Reading first file name in this dir..."); string strFileName = myFtpDll.funFTPFirstFile("*.txt"); Console.WriteLine(strFileName + " found, now uploading..."); myFtpDll.funFTPGetFile(strFileName, strFileName); // if (new System.IO.FileInfo(strFileName).Exists) { // Console.WriteLine("Now deleting " + strFileName + " from dir outgoing..."); // myFtpDll.funFTPDeleteFile(strFileName); // } // else // Console.WriteLine("Local copy of the file not found!"); Console.WriteLine("Disconnecting..."); myFtpDll.funFTPDisconnect(); Console.WriteLine("Press N-I key to continue..."); Console.ReadLine(); myFtpDll.funIOpen(); Console.WriteLine("Connecting..."); myFtpDll.funIConnect(); Console.WriteLine("Change dir to developr..."); myFtpDll.funFTPChangeDir("developr"); Console.WriteLine("Now sending test.txt to this dir..."); myFtpDll.funFTPPutFile("test.txt", "test.txt"); Console.WriteLine("Disconnecting..."); myFtpDll.funFTPDisconnect(); Console.WriteLine("Press N-I key to continue..."); Console.ReadLine(); } catch (Exception e) { Console.WriteLine("Failed..." + e.Message); Console.WriteLine("Press N-I key to continue..."); Console.ReadLine(); } */ }