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Posted 24 Apr 2007

C# FTP Client Library

, 23 May 2007
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Easy to use FTP client library with features in mind.


This code is an FTP class library for adding FTP access to your projects. It is heavily based on a project (see background for original code), and is now contained in the source files. I was not sure how to update the original article or add to it so I am publishing this as a new article since there was an extensive re-work of the original code in an attempt to make it more developer-friendly.


This article, and code, are based upon the ftplib posted by J.P. Trosclair. A link to the article is here. I have left original copyright and credit notices in with the updated version of the code.

Using the code

I used nDoc to create a CHM file (in the doc directory of the code) to help with implementation. Its fairly simple, and you will mainly need basic FTP connection information (IP, username, etc.) to use the library.

An example is included in the documentation, and appears as so (to upload a file):

OpenFTP.FTP f = new OpenFTP.FTP();
f.Connect("", "username_here", "password_here");
f.Files.Upload(Path.GetFileName(sFileName), Path.GetFileName(sFileName));

while (!f.Files.UploadComplete)
    Console.WriteLine("Uploading: TotalBytes: " + 
        f.Files.TotalBytes.ToString() + ", : PercentComplete: " + 
Console.WriteLine("Upload Complete: TotalBytes: " + 
    f.Files.TotalBytes.ToString() + ", : PercentComplete: " + 

f = null;

Points of Interest

I liked the original article but decided that even though I could read and implement the code I wanted its implementation to be more simplistic so months later I won't have to re-read any code to figure how to include the methods in a new project. I have tried to remove the rough edges.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

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I am a Senior-level .NET developer using C# for about 5+ years now.

Codeproject has been a tremendous resource for me over the years.

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Comments and Discussions

QuestionThank you Pin
Jason asdf29-Apr-14 12:52
memberJason asdf29-Apr-14 12:52 
QuestionHow to check if the connection is established? Pin
AnLa06109527-Jun-11 5:08
memberAnLa06109527-Jun-11 5:08 
GeneralAlex FTPS Client Pin
B.Ritter5-Mar-11 1:09
memberB.Ritter5-Mar-11 1:09 
Generalexpect a demo Pin
pclion13-Feb-11 23:55
memberpclion13-Feb-11 23:55 
GeneralNot work in download .. Pin
AlexB4712-Feb-11 8:33
memberAlexB4712-Feb-11 8:33 
GeneralBug solutions Pin
robnet17-Aug-10 1:28
memberrobnet17-Aug-10 1:28 
GeneralRe: Bug solutions Pin
B.Ritter1-Nov-10 7:37
memberB.Ritter1-Nov-10 7:37 
QuestionI cannot get the listing of the files plus other bugs Pin
Evandrojr2-Mar-10 11:22
memberEvandrojr2-Mar-10 11:22 
GeneralActive Mode Pin
liglio27-Jan-10 15:33
memberliglio27-Jan-10 15:33 
GeneralRe: Active Mode Pin
jmers27-Jan-10 18:13
memberjmers27-Jan-10 18:13 
I'm really not sure, the ftplib was a basic class for accessing an FTP, I simply wrote a wrapper around it with methods and properties to make it easier to use. The underlying code didn't really change so if the functionality was there before it should still be there, or at least be accessible.


GeneralRe: Active Mode Pin
liglio28-Jan-10 4:13
memberliglio28-Jan-10 4:13 
GeneralRe: Active Mode Pin
Daniel Castenholz29-Jan-10 9:22
memberDaniel Castenholz29-Jan-10 9:22 
QuestionSocketException Error Code 11004 Pin
Zac Greve10-Jan-10 11:54
memberZac Greve10-Jan-10 11:54 
AnswerRe: SocketException Error Code 11004 Pin
jmers10-Jan-10 16:18
memberjmers10-Jan-10 16:18 
Questionupload folder Pin
Direkt200718-Nov-09 5:07
memberDirekt200718-Nov-09 5:07 
GeneralCF 3.5 Pin
Gateone7512-Aug-09 3:32
memberGateone7512-Aug-09 3:32 
RantLOL Pin
Seishin#8-Apr-09 3:01
memberSeishin#8-Apr-09 3:01 
GeneralRe: LOL Pin
Phylum12322-Oct-09 6:25
memberPhylum12322-Oct-09 6:25 
GeneralExceoption when trying to upload [modified] Pin
John Simmons / outlaw programmer8-Jan-09 12:52
mvpJohn Simmons / outlaw programmer8-Jan-09 12:52 
QuestionHow to connect to two FTP Servers Pin
LearnNetnAll15-Dec-08 22:59
memberLearnNetnAll15-Dec-08 22:59 
GeneralA socket operation encountered a dead network Pin
josephx2k715-Dec-08 13:41
memberjosephx2k715-Dec-08 13:41 
Generalgood library Pin
emilioarp12-Nov-08 8:30
memberemilioarp12-Nov-08 8:30 
Generalconnection was forcibly closed by the remote host at System.Net.Sockets. Pin
next100years11-Nov-08 1:55
membernext100years11-Nov-08 1:55 
GeneralA comfortable FTP class in .NET Pin
Elmue27-Aug-08 13:22
memberElmue27-Aug-08 13:22 
GeneralChangeDirectory Chrash Pin
Member 42541521-May-08 12:52
memberMember 42541521-May-08 12:52 

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