Develop Reference

Is it possible to rename a file that can be found locally before uploading it to a FTP using C#

So i have a file locally that needs to keep the same name. But when i upload the file to the FTP i want to rename it, or add some ekstra to the file name. here is how i upload the file.
string localPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
string fileName = "//XmlDocument.xml";
FtpWebRequest requestFTPUploader = (FtpWebRequest)WebRequest.Create("ftp://000.000.000/Documents" + fileName);
requestFTPUploader.Credentials = new NetworkCredential(ftpUsername, ftpPassword);
requestFTPUploader.Method = WebRequestMethods.Ftp.UploadFile;
FileInfo fileInfo = new FileInfo(localPath + fileName);
FileStream fileStream = fileInfo.OpenRead();
int bufferLength = 2048;
byte[] buffer = new byte[bufferLength];
Stream uploadStream = requestFTPUploader.GetRequestStream();
int contentLength = fileStream.Read(buffer, 0, bufferLength);
while (contentLength != 0)
{
uploadStream.Write(buffer, 0, contentLength);
contentLength = fileStream.Read(buffer, 0, bufferLength);
}
uploadStream.Close();
fileStream.Close();
requestFTPUploader = null;

There is no relation whatsoever between the name of the file you're trying to upload and the name on the server you're uploading it to.
You can upload foo.jpg as bar.exe and no one will bat an eye.
So change this:
FtpWebRequest requestFTPUploader = (FtpWebRequest)WebRequest.Create("..." + fileName);
To this:
FtpWebRequest requestFTPUploader = (FtpWebRequest)WebRequest.Create("..." + ftpFileName);
And you're good to go.

how to move files from one ftp to another

I need to move files from one ftp to another (currently using ftpwebrequest) both requiring authentication and have different settings (timeout, ascii, active etc). Is downloading files from one to a local server and then uploading to the other significant slower than just copying the files (if that exists even, how would you do it, renameto?). It feels like it should be faster but I'm not sure, I have no understanding of file copying or downloading.
they are all .txt or .csv and mostly around 3-10 mb each so quite a bit of data

You can copy a file from FTP-Server A to FTP-Server B using FXP. Both servers and the client have to support that feature.

Some time we need to download, upload file from FTP server. Here is some good example for FTP operation in C#.
You can use this. It will help you to make a C# program to full fill your requirements.
File Download from FTP Server
public void DownloadFile(stringHostURL, string UserName, string Password, stringSourceDirectory, string FileName, string LocalDirectory)
{
if(!File.Exists(LocalDirectory + FileName))
{
try
{
FtpWebRequestrequestFileDownload = (FtpWebRequest)WebRequest.Create(HostURL + “/” + SourceDirectory + “/” + FileName);
requestFileDownload.Credentials = new NetworkCredential(UserName, Password);
requestFileDownload.Method = WebRequestMethods.Ftp.DownloadFile;
FtpWebResponseresponseFileDownload = (FtpWebResponse)requestFileDownload.GetResponse();
StreamresponseStream = responseFileDownload.GetResponseStream();
FileStreamwriteStream = new FileStream(LocalDirectory + FileName, FileMode.Create);
intLength = 2048;
Byte[] buffer = new Byte[Length];
intbytesRead = responseStream.Read(buffer, 0, Length);
while(bytesRead > 0)
{
writeStream.Write(buffer, 0, bytesRead);
bytesRead = responseStream.Read(buffer, 0, Length);
}
responseStream.Close();
writeStream.Close();
requestFileDownload = null;
responseFileDownload = null;
}
catch(Exception ex)
{
throwex;
}
}
}
Some Good Examples
Hope it will help you.

download zip files by use of reader in c#

I have been working on this application that enables user to log in into another website, and then download specified file from that server. So far I have succeeded in logging on the website and download the file. But everything ruins when it comes to zip files.
Is there any chunk of code that could be helpful in reading the .zip files byte by byte or by using stream reader?
I m using downloadfile() but its not returning the correct zip file.
I need a method by which I can read zip files. Can I do it by using ByteReader()
The code used to download zip file is
string filename = "13572_BranchInformationReport_2012-05-22.zip";
string filepath = "C:\\Documents and Settings\\user\\Desktop\\" + filename.ToString();
WebClient client = new WebClient();
string user = "abcd", pass = "password";
client.Credentials = new NetworkCredential(user, pass);
client.Encoding = System.Text.Encoding.UTF8;
try
{
client.DownloadFile("https://web.site/archive/13572_BranchInformationReport_2012-05-22.zip", filepath);
Response.Write("Success");
}
catch (Exception ue)
{
Response.Write(ue.Message);
}
Thanks in advance.

is there any chunk of code that could be helpful in reading the zip files bytes by bytes aur by using stream reader.
Absolutely not. StreamReader - and indeed any TextReader is for reading text content, not binary content. A zip file is not text - it's composed of bytes, not characters.
If you're reading binary content such as zip files, you should be using a Stream rather than a TextReader of any kind.
Note that WebClient.DownloadFile and WebClient.DownloadData can generally make things easier for downloading binary content.

Another simple way to downlaod zip file
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl="~/DOWNLOAD/Filename.zip">Click To Download</asp:HyperLink>
Another solution
private void DownloadFile()
{
string getPath = "DOWNLOAD/FileName.zip";
System.IO.Stream iStream = null;
byte[] buffer = new Byte[1024];
// Length of the file:
int length;
// Total bytes to read:
long dataToRead;
// Identify the file to download including its path.
string filepath = Server.MapPath(getPath);
// Identify the file name.
string filename = System.IO.Path.GetFileName(filepath);
try
{
// Open the file.
iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,
System.IO.FileAccess.Read, System.IO.FileShare.Read);
// Total bytes to read:
dataToRead = iStream.Length;
// Page.Response.ContentType = "application/vnd.android.package-archive";
// Page.Response.ContentType = "application/octet-stream";
Page.Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
// Read the bytes.
while (dataToRead > 0)
{
// Verify that the client is connected.
if (Response.IsClientConnected)
{
// Read the data in buffer.
length = iStream.Read(buffer, 0, 1024);
// Write the data to the current output stream.
Page.Response.OutputStream.Write(buffer, 0, length);
// Flush the data to the HTML output.
Page.Response.Flush();
// buffer = new Byte[1024];
dataToRead = dataToRead - length;
}
else
{
//prevent infinite loop if user disconnects
dataToRead = -1;
}
}
}
catch (Exception ex)
{
// Trap the error, if any.
Page.Response.Write(ex.Message);
}
finally
{
if (iStream != null)
{
//Close the file.
iStream.Close();
Page.Response.Close();
}
}
}

Your answer
WebRequest objRequest = System.Net.HttpWebRequest.Create(url);
objResponse = objRequest.GetResponse();
byte[] buffer = new byte[32768];
using (Stream input = objResponse.GetResponseStream())
{
using (FileStream output = new FileStream ("test.doc",
FileMode.CreateNew))
{
int bytesRead;
while ( (bytesRead=input.Read (buffer, 0, buffer.Length)) > 0)
{
output.Write(buffer, 0, bytesRead);
}
}
}
This is how i achieved it. Thanks everyone for ur help

Downloading ZIP file from FTP and copying to folder within website

Finding some problems copying a zip file from an FTP location. It is just copying and empty file so I think there is something wrong with my use of StreamReader or StreamWriter.
Here is the code:
//read through directory details response
string line = reader.ReadLine();
while (line != null)
{
if (line.EndsWith("zip")) //"d" = dir don't need "." or ".." dirs
{
FtpWebRequest downloadRequest = (FtpWebRequest)FtpWebRequest.Create("ftp://" + ftpHost + line); //new Uri("ftp://" + ftpServerIP + DestinationFolder + fileInf.Name));
downloadRequest.Credentials = new NetworkCredential(ConfigurationManager.AppSettings["FilesUser"], ConfigurationManager.AppSettings["FilesPass"]);
downloadRequest.KeepAlive = false;
downloadRequest.UseBinary = true;
downloadRequest.Method = WebRequestMethods.Ftp.DownloadFile;
string folderToWrite = HttpContext.Current.Server.MapPath("~/Routing/RoutingFiles/");
string folderToSave = HttpContext.Current.Server.MapPath("~/Routing/");
StreamReader downloadRequestReader = new StreamReader(downloadRequest.GetResponse().GetResponseStream());
DirectoryInfo downloadDirectory = new DirectoryInfo(folderToWrite);
FileInfo file = new FileInfo(Path.Combine(downloadDirectory.FullName, line));
if (!file.Exists)
{
StreamWriter writer = new StreamWriter(Path.Combine(folderToWrite, line), false);
writer.Write(downloadRequestReader.ReadToEnd());
using (var downloadResponseStream = response.GetResponseStream())
{
}
}
}
}
By the time it gets to the bottom of that section, the file has been copied but is empty so I don't think I'm reading the stream correctly for a zip file. Anyone any ideas? I've seen talk of FileStream being better for downloading Zip files, but I couldn't get that to work either.
Thanks.

Here is an example that downloads a file from an ftp.
try
{
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftpAddr + "test.zip");
request.Credentials = new NetworkCredential(userName, password);
request.UseBinary = true; // Use binary to ensure correct dlv!
request.Method = WebRequestMethods.Ftp.DownloadFile;
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
FileStream writer = new FileStream("test.zip", FileMode.Create);
long length = response.ContentLength;
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte[2048];
readCount = responseStream.Read(buffer, 0, bufferSize);
while (readCount > 0)
{
writer.Write(buffer, 0, readCount);
readCount = responseStream.Read(buffer, 0, bufferSize);
}
responseStream.Close();
response.Close();
writer.Close();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
Edit I'm sorry for the error in previous code.
When correcting my previous code I found the following resource useful: example

Multiple files downloading using FTP crash only on runtime(not debuging)

I think I have some memory issue with a function that should download a file from ftp server. The reason that I think it's a memory thing is because it works fine during debug (maybe it gives the garbage collector more time). Yet I thought that the using should solve this...
Just to be clear the function works when called once yet calling it several times in a for loop invokes the err message: 550 The specified network name is no longer available.
Please help
Asaf
private void downloadFile(string sourceFile, string targetFolder)
{
string remoteFile = sourceFile.Replace("\\","//");
string localFolder = targetFolder + "\\" + sourceFile.Substring(sourceFile.LastIndexOf("\\")+1);
string filename = "ftp://" + ftpServerIP + "//" + remoteFile;
FtpWebRequest ftpReq = (FtpWebRequest)WebRequest.Create(filename);
ftpReq.Method = WebRequestMethods.Ftp.DownloadFile;
ftpReq.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
ftpReq.UseBinary = true;
ftpReq.Proxy = null;
ftpReq.KeepAlive = false; //'3. Settings and action
try
{
using (System.Net.FtpWebResponse response = (System.Net.FtpWebResponse)(ftpReq.GetResponse()))
{
using (System.IO.Stream responseStream = response.GetResponseStream())
{
using (System.IO.FileStream fs = new System.IO.FileStream(localFolder, System.IO.FileMode.Create))
{
Byte[] buffer = new byte[2047];
int read = 0;
do
{
read = responseStream.Read(buffer, 0, buffer.Length);
fs.Write(buffer, 0, read);
} while (read == 0);
responseStream.Close();
fs.Flush();
fs.Close();
}
responseStream.Close();
}
response.Close();
}
}
catch (WebException ex)
{
FtpWebResponse response = (FtpWebResponse)ex.Response;
Console.Out.WriteLine(response.StatusDescription);
}
}

There's a bug in the read loop that causes large files to be truncated. Use:
int read;
while ((read = responseStream.Read(buffer, 0, buffer.Length)) != 0)
{
fs.Write(buffer, 0, read);
}
With that change in place I was able to download a number of large files via FTP without encountering exceptions.