How to upload files and encrypt in FTP server

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have written below code to copy file from local system to ftp server , similarly i need to select multiple files and upload them in server . While i upload the files it should be converted as encrypted files, any suggestions, i have written code for encryption also.

What I have tried:

public class WebRequestGetExample  
{  
public static void Main ()  
{  
// Get the object used to communicate with the server.  
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://192.1....../ftp.txt"); request.Method =WebRequestMethods.Ftp.UploadFile;  
// This example assumes the FTP site uses anonymous logon.  
request.Credentials = new NetworkCredential("username", "password");  
// Copy the contents of the file to the request stream.  
byte[] fileContents;  
using (StreamReader sourceStream = new StreamReader("E:\\Anusha\\ftp.txt"))  
{  
fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());  
}  
request.ContentLength = fileContents.Length;  
using (Stream requestStream = request.GetRequestStream())  
{  
requestStream.Write(fileContents, 0, fileContents.Length);  
}  
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())  
{  
Console.WriteLine("Upload File Complete, status {0}", response.StatusDescription);  
}  
}  
}

Posted 7-May-18 19:18pm

Member 13777104

Updated 8-May-18 17:28pm

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Richard MacCutchan 8-May-18 3:25am

To upload multiple files you need to do it in a loop. And you can encrypt them before sending, or on receipt at the server.

Member 13777104 8-May-18 4:50am

Hi Richard,
I want to encrypt the file while uploading in to ftp server, like when we click on a file we need to encrypt as we all as upload in ftpserver and when we click on download in server it should decrypt. any idea on this

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RickZeeland · Answer 1 · 2018-05-07T22:10:00

Solution 1

WebClient offers an easy way to upload and download using FTP, see: c# - Upload file and download file from FTP - Stack Overflow[^]
You can encrypt using the System.Security.Cryptography namespace in .NET.
Here is a good article about encryption on CodeProject: Swanky Encryption/Decryption in C#[^]

Posted 7-May-18 22:10pm

RickZeeland

Updated 8-May-18 21:24pm

v2

Comments

Member 13777104 8-May-18 4:46am

Hi, I have written below code to upload multiple files but the certain folder was not updated in ftp server,please helpwhere i went wrong.
public class WebRequestGetExample
{
public static void Main ()
{
try
{
// Get the object used to communicate with the server.
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://192...../E:\\folder1");
request.Method = WebRequestMethods.Ftp.UploadFile;
// This example assumes the FTP site uses anonymous logon.
request.Credentials = new NetworkCredential("username", "pwd");
// Copy the contents of the file to the request stream.
IEnumerable<string> files = Directory.EnumerateFiles(@"E:\\folder1");
using (WebClient client = new WebClient())
{
client.Credentials = new NetworkCredential("username", "password");
foreach (string file in files)
{
client.UploadFile("ftp://192..../E:\\folder1" + Path.GetFileName(file), file);
}
}

using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
{
Console.WriteLine("Upload File Complete, status {0}", response.StatusDescription);
}
}
catch(Exception e)
{

}
}

RickZeeland 8-May-18 14:20pm

Maybe you need to set ftpRequest.UseBinary to true, see example here: https://www.codeproject.com/Articles/667201/FtpWebRequest
For large files you may need to set the ftpRequest.Timeout value.

Member 13818142 8-May-18 23:30pm

Hi i am getting error as The name 'ftpRequest' does not exist in the current context what should i do

RickZeeland 9-May-18 2:26am

In your code it's named 'request' ...

Member 13818142 9-May-18 2:36am

sorry sir i have complied above code but unable to display files in ftp server not sure where to change the code searched examples but i am not sure where to change please suggest, my loop is getting terminated after clientuploadfile(...)statment

RickZeeland 9-May-18 3:06am

And what error shows in the output window when you change your catch to this:

catch(Exception e)
{
Debug.Print(e.Message);
}

Member 13818142 9-May-18 3:18am

@Rick thanks for your reply error got resolved it was just a simple mistake, i am taking correct ftp username and pwd, sorry for trouble..

Member 13818142 9-May-18 3:19am

the same way when i upload i need to write a code for a file and then that file should be encrypted any idea.