C # Form freezes while processing information.

I wrote my own web scraper for myself that scrapes information about the artist. the code works, but when I click the button and run the while loop, the GUI freezes up. I got text fields in .refresh (). But I cannot move the form, also the only way to cancel the program is to force me to quit smoking. I am rewriting this now, so I don't understand the problem. Also, I heard about how to step and wanted to see if that would work and also make it a little faster. the program breaks 15,000+ pages and then on each page there are 10 or so more pages to be undone. Thus, the program can run for several hours before it finally ends.

Here is my code.

        private void btnGet_Click(object sender, EventArgs e)
    {
        int i = 0;
        int maxCount = 15000; //11234 was last value 

        progressBar.Maximum = maxCount;

        while (i <= maxCount)
        {
            txbURL.Text = "http://www.newreleasetuesday.com/albumdetail.php?album_id=" + i;
            label.Text = i.ToString() + " out of " + maxCount.ToString() + " Done.";
            progressBar.Value = i;

            string url = txbURL.Text;

            string sourceCode = sourceCode = WorkerClass.getSourceCode(url);
            int startIndex = sourceCode.IndexOf("//alert(document.getElementById(\"remcheck\").value)");
            sourceCode = sourceCode.Substring(startIndex, sourceCode.Length - startIndex);

            //Start Artist Name
            //Gets the Artist ID
            int idCountIndex = sourceCode.IndexOf("  by <a href=\"artistdetail.php?artist_id=") + 41;
            int idCountEndIndex = sourceCode.IndexOf("\">", idCountIndex);
            string artistID = sourceCode.Substring(idCountIndex, idCountEndIndex - idCountIndex) + "";
            txbArtistID.Text = artistID;

            //Gets Artist Name
            startIndex = sourceCode.IndexOf("  by <a href=\"artistdetail.php?artist_id=") + 43 + artistID.Length;
            int endIndex = sourceCode.IndexOf("</a> | Genre", startIndex);
            string artistName = sourceCode.Substring(startIndex, endIndex - startIndex) + "";
            txbArtist.Text = artistName;
            //End Artist Name

            //Start Album Name
            //Gets Album ID
            string albumID = url.Substring(url.IndexOf("=") + 1);
            txbAlbumID.Text = albumID;

            //Gets Album Name
            startIndex = sourceCode.IndexOf("absbottom\"></span></strong> ") + 28;
            endIndex = sourceCode.IndexOf("</span></td>", startIndex);
            string AlbumName = sourceCode.Substring(startIndex, endIndex - startIndex) + "";
            txbAlbum.Text = AlbumName;
            //End Album Name

            //Start Genre
            startIndex = sourceCode.IndexOf("</a> | Genre: ") + 14;
            endIndex = sourceCode.IndexOf(" | ", startIndex);
            string genre = sourceCode.Substring(startIndex, endIndex - startIndex) + "";
            txbGenre.Text = genre;
            //End Genre

            //Start Release Date
            startIndex = sourceCode.IndexOf("<a href=\"releasedate.php?release_date=") + 50;
            endIndex = sourceCode.IndexOf(" </a></td>", startIndex);
            string releaseDate = sourceCode.Substring(startIndex, endIndex - startIndex) + "";
            txbReleaseDate.Text = releaseDate;
            //End Release Date

            //Start Pic URL
            startIndex = sourceCode.IndexOf("<img  src=\"") + 11;
            endIndex = sourceCode.IndexOf("\"  alt=", startIndex);
            string PicURL = sourceCode.Substring(startIndex, endIndex - startIndex) + "";
            PicURL = PicURL.Replace("amp;", "");
            string fullLink = "http://www.newreleasetuesday.com/" + PicURL;
            txbPicURL.Text = fullLink;
            //End Pic URL


            //Refresh UI (Updates textBoxes, labels, and progressBar with new values)
            txbURL.Refresh();
            txbArtist.Refresh();
            txbAlbum.Refresh();
            txbReleaseDate.Refresh();
            txbGenre.Refresh();
            txbPicURL.Refresh();
            txbArtistID.Refresh();
            txbAlbumID.Refresh();
            label.Refresh();
            progressBar.Refresh();

            if (artistName == "")
            {
                // Adding info to Database if there is no artist name
                string cs = "SERVER=asdf.net;" +
                    "DATABASE=music;" +
                    "UID=root;" +
                    "PASSWORD=asdf;";

                MySqlConnection conn = null;

                conn = new MySqlConnection(cs);
                conn.Open();

                MySqlCommand cmd = new MySqlCommand();
                cmd.Connection = conn;
                cmd.CommandText = "INSERT INTO `emptyalbums` (id, albumid) VALUES('',@albumid)";
                cmd.Prepare();

                cmd.Parameters.AddWithValue("@albumid", albumID);

                cmd.ExecuteNonQuery();
                conn.Close();
            }
            else
            {
                // Adding info to Database if there is an artist name
                string cs = "SERVER=asdf.net;" +
                    "DATABASE=music;" +
                    "UID=root;" +
                    "PASSWORD=asdf;";

                MySqlConnection conn = null;

                conn = new MySqlConnection(cs);
                conn.Open();

                MySqlCommand cmd = new MySqlCommand();
                cmd.Connection = conn;
                cmd.CommandText = "INSERT INTO `database` (id, artist, album, releasedate, genre, pictureurl, artistid, albumid) VALUES('',@artist, @album, @releasedate, @genre, @pictureurl, @artistid, @albumid)";
                cmd.Prepare();

                cmd.Parameters.AddWithValue("@artist", artistName);
                cmd.Parameters.AddWithValue("@album", AlbumName);
                cmd.Parameters.AddWithValue("@releasedate", releaseDate);
                cmd.Parameters.AddWithValue("@genre", genre);
                cmd.Parameters.AddWithValue("@pictureurl", fullLink);
                cmd.Parameters.AddWithValue("@artistid", artistID);
                cmd.Parameters.AddWithValue("@albumid", albumID);

                cmd.ExecuteNonQuery();
                conn.Close();
            }
            i++;

        }

      

        
        
        
      

    

Any information has come a long way. Thanks, Throdne