private void button5_Click(object sender, EventArgs e)
        {
            db_handle db = new db_handle();

            dataGridView1.Dispose();
            dataGridView1.DataSource = db._load_records();
            dataGridView1.Update();
        }
        private void viewRecordsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            group_view_rec.Size     = new Size(826, 375);
            group_view_rec.Location = new Point(10, 27);
            group_view_rec.Visible  = true;
            group_register.Visible  = false;
            group_search.Visible    = false;
            db_handle db = new db_handle();

            dataGridView1.DataSource = db._load_records();
        }