Effettua l'aggiornamento di un programma via FTP (C#)
[C# ]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Pepperminds.BusinessLogic;
using System.Net;
using System.IO;
using System.Reflection;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Threading;
using System.Diagnostics;

namespace mio_programma_update
{
    public partial class Form1 : Form
    {

        public string ftpServerIP, ftpUserID, ftpPassword;
        public int byteToRead = 0;
        public int tread = 0;

        public Form1()
        {
            InitializeComponent();

            this.toolStripStatusLabel1.Text = "Pronto.";

        }


        public delegate void DelegateWithParameters(string param1);

        private void button1_Click(object sender, EventArgs e)
        {

            Process[] lst = Process.GetProcesses();
            bool StartingProc; 


            StartingProc = false;
            foreach (Process p in lst)
            {
                if (p.ProcessName.ToLower().StartsWith("mio_programma.exe"))
                    StartingProc = true;
            }



            if (!StartingProc)
            {
                //this.progressBar1.Value = 0;

                DelegateWithParameters mi = new DelegateWithParameters(this.Update_status);
                //this.Invoke(mi);
                IAsyncResult tag = mi.BeginInvoke(@"Ricerca aggiornamenti in corso.", null, null);

                mi.EndInvoke(tag);
                //this.toolStripStatusLabel1.Text = "Ricerca aggiornamento in corso...";

                ftpServerIP = "mioFTP/Mia_cartella";
                ftpUserID = @"MiaUser";
                ftpPassword = @"MiaPassword";


                Download(Directory.GetCurrentDirectory().ToString(), "mio_programma.exe");


                mi = new DelegateWithParameters(this.Update_status);
                tag = mi.BeginInvoke(@"Aggiornamento effettuato.", null, null);

                mi.EndInvoke(tag);
            }
            else
                MessageBox.Show("Impossibile eseguire l'aggiornamento se mio_programma è aperto. Chiudere mio_programma e riprovare."); 
            
        }



        private void Update_status(string s)
        {
            this.toolStripStatusLabel1.Text = s; 
        }

        private void Download(string filePath, string fileName)
        {
            FtpWebRequest reqFTP;
            string t;

            progressBar1.Value = 0;

            try
            {
                //filePath: The full path where the file is to be created.
                //fileName: Name of the file to be createdNeed not name on
                //          the FTP server. name name()
                FileStream outputStream = new FileStream(filePath + "\\" +
                   fileName, FileMode.Create);

                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://"
                   + ftpServerIP + "/" + fileName));
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID,
                                                           ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                long cl = response.ContentLength;
                int bufferSize = 2048;


                MessageBox.Show(cl.ToString());
                tread = 0;

                int readCount;
  
                byte[] buffer = new byte[bufferSize];

                readCount = ftpStream.Read(buffer, 0, bufferSize);
                t = this.toolStripStatusLabel1.Text;
                while (readCount > 0)
                {
                    tread += readCount;
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                    //ChangeLabel(t + " scritti " + tread.ToString());
                    MethodInvoker mi = new MethodInvoker(this.UpdateProgress);
                    this.Invoke(mi);
                }

                ftpStream.Close();
                outputStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }


        private void UpdateProgress()
        {
            if (progressBar1.Value != progressBar1.Maximum)
            {
                progressBar1.Value += 1;
            }
        }
      
    }
}