Biskilog/BISKILOG POS PREMIUM/Users/users.cs

using BiskLog_Point_Of_Sale.Properties;
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Web.Security;
using System.Windows.Forms;

namespace Point_Of_Sale_Managment
{
    public partial class users : Form
    {
        DatabaseConn conn = new DatabaseConn();
        SqlConnection cn = new SqlConnection();
        SqlCommand cm = new SqlCommand();
        SqlDataReader dr;
        public users()
        {
            InitializeComponent();
            cn = new SqlConnection(conn.MyConnection());
            loading.Left = (ClientSize.Width - loading.Width) / 2;
        }
        private async void users_Load(object sender, EventArgs e)
        {
            Task<int> task = new Task<int>(LoadUsers);
            loading.Visible = true;
            task.Start();
            await task;
            loading.Visible = false;
        }

        private void Button1_Click(object sender, EventArgs e)
        {
            AddUser newUser = new AddUser(this);
            newUser.BringToFront();
            newUser.ShowDialog();
        }
        public int LoadUsers()
        {
            try
            {
                dataGridView1.Invoke(new Action(() => dataGridView1.Rows.Clear()));
                int i = 1;
                cn.Open();
                cm = new SqlCommand("Select username,firstname,surname,access_level,last_login from tblUsers where branchID = @branchID", cn);
                cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                dr = cm.ExecuteReader();
                while (dr.Read())
                {
                    string lastLogin;
                    if (String.IsNullOrEmpty(dr[4].ToString()))
                    {
                        lastLogin = "Not Logged in yet";
                    }
                    else
                    {
                        lastLogin = Convert.ToDateTime(dr[4].ToString()).ToString("dddd, dd MMMM yyyy HH:mm:ss");
                    }
                    switch (dr[3].ToString())
                    {
                        case "owner":
                            dataGridView1.Invoke(new Action(() => dataGridView1.Rows.Add(i, dr[0].ToString(), dr[1].ToString() + " " + dr[2].ToString(), "Owner",lastLogin)));
                            i++;
                            break;
                        case "manager":
                            dataGridView1.Invoke(new Action(() => dataGridView1.Rows.Add(i, dr[0].ToString(), dr[1].ToString() + " " + dr[2].ToString(), "Manager",lastLogin)));
                            i++;
                            break;
                        case "assist":
                            dataGridView1.Invoke(new Action(() => dataGridView1.Rows.Add(i, dr[0].ToString(), dr[1].ToString() + " " + dr[2].ToString(), "Assistant Manager", lastLogin)));
                            i++;
                            break;
                        case "cashier":
                            dataGridView1.Invoke(new Action(() => dataGridView1.Rows.Add(i, dr[0].ToString(), dr[1].ToString() + " " + dr[2].ToString(), "Cashier", lastLogin)));
                            i++;
                            break;
                    }
                }
                dr.Close();
                cn.Close();
                dataGridView1.Invoke(new Action(() => dataGridView1.ClearSelection()));
                return 1;
            }
            catch
            {
                cn.Close();
                return 2;
            }
        }
    }
}