private void viewSummaryStockOutButton_Click(object sender, EventArgs e)
        {
            SearchViewItemSummaryForm searchViewItemSummaryForm = new SearchViewItemSummaryForm();

            this.Close();
            thread = new Thread(OpenViewSummaryForm);
            thread.SetApartmentState(ApartmentState.STA);
            thread.Start();
        }
        private void loginButton_Click(object sender, EventArgs e)
        {
            string conString = ConfigurationManager.ConnectionStrings["stockManagementSystemConnection"].ConnectionString;
            string query     = "SELECT * FROM Login WHERE Username='******' AND Password='******'";

            SqlDataAdapter sda  = new SqlDataAdapter(query, conString);
            DataTable      dtbl = new DataTable();

            sda.Fill(dtbl);
            if (dtbl.Rows.Count >= 1)
            {
                SearchViewItemSummaryForm startForm = new SearchViewItemSummaryForm();
                //StockMenu menu = new StockMenu();
                //menu.Show();
                //this.Hide();
                startForm.Show();
                this.Hide();
            }
            else
            {
                MessageBox.Show("Please, check your username and password.");
            }
        }