How to upload a file on FTP Server in ASP.Net

using System;

using System.Data;

using System.Configuration;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.Net;

using System.IO;

///

/// Summary description for ftpuploadfile

///

public class ftpuploadfile

{

      public ftpuploadfile()

      {

            //

            // TODO: Add constructor logic here

            //

      }

    public void Upload(string path)

    {

        try

        {

            //WriteText("IN time for Upload file on FTP: " + DateTime.Now.ToString() + "");

            string ftpServerIP = "ftpservername".;//"120.0.0.2";

            // string filepath = path + "\\" + filename;

            FileInfo fileInf = new FileInfo(path);

            string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;

            FtpWebRequest reqFTP;

            // Create FtpWebRequest object from the Uri provided

            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileInf.Name));

            // Provide the WebPermission Credintials

            reqFTP.Credentials = new NetworkCredential("", "");

            // By default KeepAlive is true, where the control connection is

            // not closed after a command is executed.

            reqFTP.KeepAlive = false;

            // Specify the command to be executed.

            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

            // Specify the data transfer type.

            reqFTP.UseBinary = true;

            // Notify the server about the size of the uploaded file

            reqFTP.ContentLength = fileInf.Length;

            // The buffer size is set to 2kb

            //bool exists = ftpFileExist(uri);

            if (ftpFileExist(uri) == false)

            {

                int buffLength = 2048;

                byte[] buff = new byte[10000];

                int contentLen;

                // Opens a file stream (System.IO.FileStream) to read

                //the file to be uploaded

                FileStream fs = fileInf.OpenRead();

                try

                {

                    //WriteText("IN time for file write on FTP: " + DateTime.Now.ToString() + "");

                    // Stream to which the file to be upload is written

                    Stream strm = reqFTP.GetRequestStream();

                    // Read from the file stream 2kb at a time

                    contentLen = fs.Read(buff, 0, buffLength);

                    // Till Stream content ends

                    while (contentLen != 0)

                    {

                        // Write Content from the file stream to the

                        // FTP Upload Stream

                        strm.Write(buff, 0, contentLen);

                        contentLen = fs.Read(buff, 0, buffLength);

                    }

                    // Close the file stream and the Request Stream

                    strm.Close();

                    fs.Close();

                    WriteText("Successfully file write on FTP:");

                    // WriteText("out time for file write on FTP: " + DateTime.Now.ToString() + "");

                    WriteText("-------------------------------------------------------------------------");

                }

                catch (Exception ex)

                {

                    WriteText("Error on file write on FTP:" + ex.Message + "");

                    WriteText("--------------------------------------------------------------------------");

                }

            }

            else

            {

                int buffLength = 2048;

                byte[] buff = new byte[10000];

                int contentLen;

                // Opens a file stream (System.IO.FileStream) to read

                //the file to be uploaded

                FileStream fs = fileInf.OpenRead();

                try

                {

                    //WriteText("IN time for file write on FTP: " + DateTime.Now.ToString() + "");

                    // Stream to which the file to be upload is written

                    Stream strm = reqFTP.GetRequestStream();

                    // Read from the file stream 2kb at a time

                    contentLen = fs.Read(buff, 0, buffLength);

                    // Till Stream content ends

                    while (contentLen != 0)

                    {

                        // Write Content from the file stream to the

                        // FTP Upload Stream

                        strm.Write(buff, 0, contentLen);

                        contentLen = fs.Read(buff, 0, buffLength);

                    }

                    // Close the file stream and the Request Stream

                    strm.Close();

                    fs.Close();

                    WriteText("Successfully file write on FTP:");

                    // WriteText("out time for file write on FTP: " + DateTime.Now.ToString() + "");

                    WriteText("-------------------------------------------------------------------------");

                }

                catch (Exception ex)

                {

                    WriteText("Error on file write on FTP:" + ex.Message + "");

                    WriteText("--------------------------------------------------------------------------");

                }

            }

            WriteText("Successfully Upload file on FTP:");         

            WriteText("-----------------------------------------------------------------------------------");

        }

        catch (Exception ex)

        {

            WriteText("Error on Upload file on FTP:" + ex.Message + "");         

            WriteText("--------------------------------------------------------------------------");

        }

    }

    public bool ftpFileExist(string fileName)

    {

        WebClient wc = new WebClient();

        try

        {

            wc.Credentials = new NetworkCredential("", "");

            byte[] fData = wc.DownloadData(fileName);

            if (fData.Length > -1)

            {

                return true;

            }

            else

            {

                return false;

            }

        }

        catch (Exception)

        {

            // Debug here?

        }

        return false;

    }

    // function for wtite logfile

    public void WriteText(string Message)

    {

        try

        {

            if (!string.IsNullOrEmpty(Message))

            {

                using (System.IO.StreamWriter w = System.IO.File.AppendText(ConfigurationManager.ConnectionStrings["ealogfile"].ToString()))

                {

                    w.WriteLine(Message);

                    w.Flush();

                    w.Close();

                }

            }

        }

        catch (Exception ex)

        {

            //System.Windows.Forms.MessageBox.Show(ex.Message.ToString());

        }

    }

}

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