Ftp Client Library For C#

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FTP client library for C# Author

Dan Glass

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Finding a fully working, lightweight ftp client that had no GUI, was free, and came with source was difficult. This API is based on one Jaimon Mathew had done, and I have added some methods, cleaned up the code, debugged it, added some error handling, logging, debugging etc.

It is easy to use. Here is a code example: FtpClient ftp = new FtpClient(FtpServer,FtpUserName,FtpPassword); ftp.Login(); ftp.Upload(@"C:\image.jpg"); ftp.Close();

Not so difficult now is it? I am using it in my WebCamService list on this site. I started out wrapping fully the WinInet API, but it was sucha labourous task that it made sense to just to the FTP, sinse Microsoft has great support for HTTP, I could skip that, and later work on SMTP.

Features ● ● ● ● ● ● ● ●

Upload Recursive Upload Download Resume Delete Rename Create Directory Asynchronous operation

Short-Comings ● ● ● ●

Not fully tested No real error handling No download recurse yet Rename will overwrite if the targey already exists

Asynchronous operation A little more advanced, the asynchronous operation is for when you need the job to fork while your code continues over the method. All asynchronous method start with Begin. Using it is simple. You need a couple of things, an AsyncCallback object and a method which it handles, like so:

private FtpClient ftp = null; private void UploadPicture(string imagePath) { string FtpServer = ConfigurationSettings.AppSettings["FtpServer"]; string FtpUserName = ConfigurationSettings.AppSettings["FtpUserName"]; string FtpPassword = ConfigurationSettings.AppSettings["FtpPassword"]; AsyncCallback callback = new AsyncCallback(CloseConnection); ftp = new FtpClient(FtpServer,FtpUserName,FtpPassword); ftp.Login(); ftp.BeginUpload(imagePath, callback); ftp.Close(); } private void CloseConnection(IAsyncResult result)

{ Debug.WriteLine(result.IsCompleted.ToString()); if ( ftp != null ) ftp.Close(); ftp = null; }

When the upload finishes (or throws an exception), the CloseConnection method will be called.

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