How to use this Ftp Code [closed]

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I am new c#. I want to know what I should change in this code to connect to my ftp server. Can anyone help me, please? I am unable to understand string fileName, Uri serverUri, long offset, So please help me.

ftphost address= localhost
username = test
password = test
filename = test.zip

   public static bool RestartDownloadFromServer(string fileName, Uri serverUri, long offset)
    {
        // The serverUri parameter should use the ftp:// scheme.
        // It identifies the server file that is to be downloaded
        // Example: ftp://contoso.com/someFile.txt.

        // The fileName parameter identifies the local file.
        //The serverUri parameter identifies the remote file.
        // The offset parameter specifies where in the server file to start reading data.

        if (serverUri.Scheme != Uri.UriSchemeFtp)
        {
            return false;
        }
        // Get the object used to communicate with the server.
        FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
        request.Method = WebRequestMethods.Ftp.DownloadFile;
        request.ContentOffset = offset;
        FtpWebResponse response = null;
        try
        {
            response = (FtpWebResponse)request.GetResponse();
        }
   开发者_如何学编程     catch (WebException e)
        {
            Console.WriteLine(e.Status);
            Console.WriteLine(e.Message);
            return false;
        }
        // Get the data stream from the response.
        Stream newFile = response.GetResponseStream();
        // Use a StreamReader to simplify reading the response data.
        StreamReader reader = new StreamReader(newFile);
        string newFileData = reader.ReadToEnd();
        // Append the response data to the local file
        // using a StreamWriter.
        StreamWriter writer = File.AppendText(fileName);
        writer.Write(newFileData);
        // Display the status description.

        // Cleanup.
        writer.Close();
        reader.Close();
        response.Close();
        Console.WriteLine("Download restart - status: {0}", response.StatusDescription);
        return true;
    }

Thanks in Addvance.

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The comments at the beginning of the method are more than adequate.

Call the method to kick things off:

 RestartDownloadFromServer("ftp://localhost/test.zip", "c:\test.zip", 0);

The example you have does not cope with username/password. For that you will need to create a NetworkCredential and add it to the WebRequest.

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In your code sample are these words what else would you need.

// The serverUri parameter should use the ftp:// scheme. // It identifies the server file that is to be downloaded // Example: ftp://contoso.com/someFile.txt. // The fileName parameter identifies the local file. //The serverUri parameter identifies the remote file. // The offset parameter specifies where in the server file to start reading data.

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It sounds like you're just beginning C#

Have a look at the following links. You need to learn to walk before you can run!

http://msdn.microsoft.com/en-us/beginner/bb308730.aspx

http://www.csharp-station.com/Tutorial.aspx