Upload file on FTP

I want to upload file from one server to another FTP server and following is my code to upload file but it is throwing an error as:

The remote server returned an error: (550) File unavailable (e.g., file not found, no access).

This my code:

string CompleteDPath = "ftp URL";
string UName = "UserName";
string PWD = "Password";
WebRequest reqObj = WebRequest.Create(CompleteDPath + FileName);
reqObj.Method = WebRequestMethods.Ftp.UploadFile;
reqObj.Credentials = new NetworkCredential(UName, PWD);
FileStream streamObj = System.IO.File.OpenRead(Server.MapPath(FileName));
byte[] buffer = new byte[streamObj.Length + 1];
streamObj.Read(buffer, 0, buffer.Length);
streamObj.Close();
streamObj = null;
reqObj.GetRequestStream().Write(buffer, 0, buffer.Length);
reqObj = null; 

Can you please tell me where i am going wrong?

Please make sure your ftp path is set as shown below.

string CompleteDPath = "ftp://www.example.com/wwwroot/videos/";

string FileName = "sample.mp4";

WebRequest reqObj = WebRequest.Create(CompleteDPath + FileName);

The following script work great with me for uploading files and videos to another servier via ftp.

FtpWebRequest ftpClient = (FtpWebRequest)FtpWebRequest.Create(ftpurl + "" + username + "_" + filename);
ftpClient.Credentials = new System.Net.NetworkCredential(ftpusername, ftppassword);
ftpClient.Method = System.Net.WebRequestMethods.Ftp.UploadFile;
ftpClient.UseBinary = true;
ftpClient.KeepAlive = true;
System.IO.FileInfo fi = new System.IO.FileInfo(fileurl);
ftpClient.ContentLength = fi.Length;
byte[] buffer = new byte[4097];
int bytes = 0;
int total_bytes = (int)fi.Length;
System.IO.FileStream fs = fi.OpenRead();
System.IO.Stream rs = ftpClient.GetRequestStream();
while (total_bytes > 0)
{
   bytes = fs.Read(buffer, 0, buffer.Length);
   rs.Write(buffer, 0, bytes);
   total_bytes = total_bytes - bytes;
}
//fs.Flush();
fs.Close();
rs.Close();
FtpWebResponse uploadResponse = (FtpWebResponse)ftpClient.GetResponse();
value = uploadResponse.StatusDescription;
uploadResponse.Close();

Here are sample code to upload file on FTP Server

    string filename = Server.MapPath("file1.txt");
    string ftpServerIP = "ftp.demo.com/";
    string ftpUserName = "dummy";
    string ftpPassword = "dummy";

    FileInfo objFile = new FileInfo(filename);
    FtpWebRequest objFTPRequest;

    // Create FtpWebRequest object 
    objFTPRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + objFile.Name));

    // Set Credintials
    objFTPRequest.Credentials = new NetworkCredential(ftpUserName, ftpPassword);

    // By default KeepAlive is true, where the control connection is 
    // not closed after a command is executed.
    objFTPRequest.KeepAlive = false;

    // Set the data transfer type.
    objFTPRequest.UseBinary = true;

    // Set content length
    objFTPRequest.ContentLength = objFile.Length;

    // Set request method
    objFTPRequest.Method = WebRequestMethods.Ftp.UploadFile;

    // Set buffer size
    int intBufferLength = 16 * 1024;
    byte[] objBuffer = new byte[intBufferLength];

    // Opens a file to read
    FileStream objFileStream = objFile.OpenRead();

    try
    {
        // Get Stream of the file
        Stream objStream = objFTPRequest.GetRequestStream();

        int len = 0;

        while ((len = objFileStream.Read(objBuffer, 0, intBufferLength)) != 0)
        {
            // Write file Content 
            objStream.Write(objBuffer, 0, len);

        }

        objStream.Close();
        objFileStream.Close();
    }
    catch (Exception ex)
    {
        throw ex;
    }

You can also use the higher-level WebClient type to do FTP stuff with much cleaner code:

using (WebClient client = new WebClient())
{
    client.Credentials = new NetworkCredential(ftpUsername, ftpPassword);
    client.UploadFile("ftp://ftpserver.com/target.zip", "STOR", localFilePath);
}

In case you're still having issues here's what got me past all this. I was getting the same error in-spite of the fact that I could perfectly see the file in the directory I was trying to upload - ie: I was overwriting a file.

My ftp url looked like:

// ftp://www.mywebsite.com/testingdir/myData.xml
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://www.mywebsite.com/testingdir/myData.xml"

So, my credentials use my tester username and PW;

request.Credentials = new NetworkCredential ("tester", "testerpw");

Well, my "tester" ftp account is set to "ftp://www.mywebsite.com/testingdir" but when I actually ftp [say from explorer] I just put in "ftp://www.mywebsite.com" and log in with my tester credentials and automatically get sent to "testingdir".

So, to make this work in C# I wound up using the url - ftp://www.mywebsite.com/myData.xml Provided my tester accounts credentials and everything worked fine.

1. Please make sure your URL that you pass to WebRequest.Create has this format:

    ftp://ftp.example.com/remote/path/file.zip
   

2. There are easier ways to upload a file using .NET framework.

Easiest way

The most trivial way to upload a file to an FTP server using .NET framework is using WebClient.UploadFile method:

WebClient client = new WebClient();
client.Credentials = new NetworkCredential("username", "password");
client.UploadFile(
    "ftp://ftp.example.com/remote/path/file.zip", @"C:\local\path\file.zip");

Advanced options

If you need a greater control, that WebClient does not offer (like TLS/SSL encryption, ascii/text transfer mode, transfer resuming, etc), use FtpWebRequest, like you do. But you can make the code way simpler and more efficient by using Stream.CopyTo:

FtpWebRequest request =
    (FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/remote/path/file.zip");
request.Credentials = new NetworkCredential("username", "password");
request.Method = WebRequestMethods.Ftp.UploadFile;  

using (Stream fileStream = File.OpenRead(@"C:\local\path\file.zip"))
using (Stream ftpStream = request.GetRequestStream())
{
    fileStream.CopyTo(ftpStream);
}

For even more options, including progress monitoring and uploading whole folder, see:
Upload file to FTP using C#