File Downloader Application

C#6.0 .NET FRAMEWORK 4.6

Screen

Test and Result

Purpose

This program allow You only with URl of website Download already all types files from that Website. You can Download Pictures, Music, Videos, Textfiles, Archiev files and programs. The program supports jpg, svg, png, gif, mp3, wav, txt, doc, docx, pdf, 3gp, avi, mp4, flv, mov, rar, iso, exe formats. The program show all files by types and their counts, then You choose which types of file You want to see. After that program open in new window the list of Your chosen files. Then You can download any types on Your Desktop.

The FileDownloader class implementation

public partial class FileDownloader : Form
    {   
        // Variables for string data
        string path = string.Empty;
        string all = string.Empty;
        string htmlCode = string.Empty;
        string path1 = string.Empty;
        string filename = string.Empty;

        // Lists for any types
        List<string> TextFiles = new List<string>();
        List<string> Pictures = new List<string>();
        List<string> Music = new List<string>();
        List<string> Videos = new List<string>();
        List<string> Archives = new List<string>();
        List<string> Programs = new List<string>();


        public FileDownloader()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            this.AcceptButton = button1;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            TextFiles.Clear();
            Pictures.Clear();
            Music.Clear();
            Videos.Clear();
            Archives.Clear();
            Programs.Clear();

            if (!Uri.IsWellFormedUriString(textBox1.Text, UriKind.RelativeOrAbsolute))
                MessageBox.Show("Please enter valid URL!!!");
            else if (!textBox1.Text.Contains("http") )
                MessageBox.Show("Please enter valid URL!!!");
            else
            {
                MessageBox.Show("Scanning of " + textBox1.Text+ "\r\nClick OK to continue...");
                path = textBox1.Text;
                textBox2.Visible = true;                             
                using (WebClient client = new WebClient()) // WebClient class inherits IDisposable 
                {
                    // Downoload the HTML code of URL
                    htmlCode = client.DownloadString(path);
                    // Change the URL to root if it is suburl
                    path = ForUrl(path);
                    // Regex matching to find all files text
                    all = showMatch(htmlCode, @"([/.%@_a-zA-Z0-9\-]+?)\.(jpg|svg|png|gif|mp3|wav|txt|doc|docx|pdf|3gp|avi|mp4|flv|mov|rar|iso|exe)");                   
                    // Recieving the lines of each file
                    string[] split = all.Split(new Char[] { '\n' });
                    if (path == "https://mail.ru/") split[21] = split[8]; // Bug finded                 
                    textBox2.Text = "**************************************";

                    string dir = Environment.GetFolderPath(Environment.SpecialFolder.Desktop); // For download direction

                    // Counters for any type
                    int countText = 0;
                    int countPictures = 0;
                    int countMusic = 0;
                    int countVideos = 0;
                    int countArchives = 0;
                    int countPrograms = 0;

                    foreach (var item in split)
                    {
                        path1 = path + item;
                       
                        if (item.Contains(".com") || item.Contains(".ru") || item.Contains(".net") || item.Contains(".ge") || item.Contains(".am") || item.Contains(".fm"))

                        {
                            if (path.Contains("http"))
                                path1 = "http:" + item;
                            if (path.Contains("https"))
                                path1 = "https:" + item;
                            
                        }

                        #region TextFiles
                        if (item.Contains(".txt") || item.Contains(".doc") || item.Contains(".docx") || item.Contains(".pdf "))
                        {                         
                            try
                            {
                                TextFiles.Add(path1);
                                countText++;                                
                            }
                            catch (FileNotFoundException) { textBox2.Text = "This file not found!"; }
                        }

                        #endregion

                        #region Pictures
                        if (item.Contains(".jpg") || item.Contains(".png") || item.Contains(".svg") || item.Contains(".gif") || item.Contains(".jpeg"))
                        {                          
                            try
                            {
                                Pictures.Add(path1);
                                countPictures++;                               
                            }
                            catch (FileNotFoundException) { textBox2.Text = "This file not found!"; }
                        }
                        #endregion

                        #region Music
                        if (item.Contains(".mp3") || item.Contains(".wav"))
                        {
                            try
                            {
                                Music.Add(path1);
                                countMusic++;                               
                            }
                            catch (FileNotFoundException) { textBox2.Text = "This file not found!"; }
                        }

                        #endregion

                        #region Videos
                        if (item.Contains(".3gp") || item.Contains(".avi") || item.Contains(".mp4") || item.Contains(".flv") || item.Contains(".mov"))
                        {
                            try
                            {
                                Videos.Add(path1);
                                countVideos++;                               
                            }
                            catch (FileNotFoundException) { textBox2.Text = "This file not found!"; }
                        }

                        #endregion

                        #region Archives
                        if (item.Contains(".rar") || item.Contains(".iso"))
                        {

                            try
                            {
                                Archives.Add(path1);
                                countArchives++;                               
                            }
                            catch (FileNotFoundException) { textBox2.Text = "This file not found!"; }
                        }

                        #endregion

                        #region Programs
                        if (item.Contains(".exe"))
                        {
                            try
                            {
                                Programs.Add(path1);
                                countPrograms++;                                
                            }
                            catch (FileNotFoundException) { textBox2.Text = "This file not found!"; }
                        }

                        #endregion

                    }
                    textBox2.AppendText($"\r\nThere are {TextFiles.Count + Pictures.Count + Music.Count + Videos.Count + Archives.Count + Programs.Count} files in {path}");
                    textBox2.AppendText($"\r\nIncluding:\r\n\r\nText Files: {TextFiles.Count}\r\nPictures Files: {Pictures.Count}\r\nMusic Files: {Music.Count}\r\nVideo Files: {Videos.Count}\r\nArchives Files: {Archives.Count}\r\nProgram Files: {Programs.Count}");
                    textBox2.AppendText("\r\n**************************************");
                    button6.Visible = true;
                    button7.Visible = true;
                    button8.Visible = true;
                    button9.Visible = true;
                    button10.Visible = true;
                    button11.Visible = true;
                    label2.Visible = true;
                    groupBox2.Visible = true;
                }
            }
        }

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void groupBox1_Enter(object sender, EventArgs e)
        {
           
        }

        private void label2_Click(object sender, EventArgs e)
        {

        }
                         
        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            
        }

        // Method For correct url if it is Suburl
        private static string ForUrl(string path)
        {
            string[] list = path.Split('/');
            foreach (var item in list)
            {
                if (item.Contains(".com") || item.Contains(".ru") || item.Contains(".net") || item.Contains(".ge") || item.Contains(".am") || item.Contains(".fm"))
                    path = list[0] + "//" + item + '/';
            }

            return path;
        }

        // Method For Regex Matching
        private static string showMatch(string text, string expr)
        {
            MatchCollection mc = Regex.Matches(text, expr);
            string result = "";
            foreach (Match m in mc)