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 System.IO;
using System.Collections;
using System.Net;

namespace FTP_Client
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void attachButton_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Multiselect = true;
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                foreach (string file in ofd.FileNames)
                {
                    ListViewItem item = new ListViewItem(file);
                    FileInfo info = new FileInfo(file);
                    fileListView.Items.Add(item);
                    item.SubItems.Add(string.Format("{0:N0}KB", info.Length / 1024));
                }
            }
        }

        private void uploadFileButton_Click(object sender, EventArgs e)
        {
            string host = hostTextBox.Text;
            string username = usernameTextBox.Text;
            string password = passwordTextBox.Text;
            List<string> filesForUpload = new List<string>();
            foreach (ListViewItem item in fileListView.Items)
            {
                filesForUpload.Add(item.Text);
            }
            if (!host.StartsWith("ftp://"))
            {
                host = "ftp://" + host;
            }
            FtpUpload(host, username,
                password, filesForUpload);
            MessageBox.Show("File uploaded");
        }
        private void FtpUpload(string host, string username,
            string password, ICollection<string> attachments)
        {
            foreach (string file in attachments)
            {
                try
                {
                    Uri uri = new Uri(host);
                    WebClient client = new WebClient();
                    client.Credentials = new NetworkCredential(username, password);
                    FileInfo info = new FileInfo(file);
                    string destFileName = host + "/" + info.Name;
                    byte[] response = client.UploadFile(destFileName, file);
                    if (response.Length > 0)
                    {
                        MessageBox.Show("Response: {0}", Encoding.ASCII.GetString(response));
                    }
                }
                catch (WebException ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }
    }
}