private void btnLogIn_Click(object sender, EventArgs e)
        {
            empID = tbUsername.Text;

            using (SqlConnection openCon = new SqlConnection("server=localhost;" +
                                                             "Trusted_Connection=yes;" +
                                                             "database=sampleDB; " +
                                                             "connection timeout=30"))
            {
                using (SqlCommand comm = new SqlCommand())
                {
                    comm.Connection  = openCon;
                    comm.CommandType = CommandType.Text;
                    comm.CommandText = "SELECT * FROM emp_pw WHERE username = '******' AND password = '******';";

                    try
                    {
                        openCon.Open();
                        SqlDataReader sdr = comm.ExecuteReader();
                        if (sdr.Read() == true)
                        {
                            int eAccess = sdr.GetInt32(3);
                            if (eAccess == 1 && frmLogIn.bt == 1)
                            {
                                frmAdmin rf = new frmAdmin();
                                rf.Show();
                                this.Hide();
                            }
                            else if (eAccess == 2 && frmLogIn.bt == 2)
                            {
                                frmEmployee ef = new frmEmployee();
                                ef.Show();
                                this.Hide();
                            }
                            else
                            {
                                lblIncorrect.Text = "*Invalid username or password";
                            }
                        }
                        else
                        {
                            lblIncorrect.Text = "*Invalid username or password";
                        }
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                    }
                    finally
                    {
                        openCon.Close();
                    }
                }
            }
        }
        private void btnLogIn_Click(object sender, EventArgs e)
        {
            empID = tbUsername.Text;
            using (SqlConnection openCon = new SqlConnection("server=localhost;" +
                                                             "Trusted_Connection=yes;" +
                                                             "database=dbPayroll; " +
                                                             "connection timeout=30"))
            {
                using (SqlCommand comm = new SqlCommand())
                {
                    comm.Connection  = openCon;
                    comm.CommandType = CommandType.Text;
                    comm.CommandText = "SELECT * FROM EmpPW WHERE EmpID = '" + tbUsername.Text +
                                       "' COLLATE Latin1_General_CS_AS AND password = '******' COLLATE Latin1_General_CS_AS ;";

                    try
                    {
                        openCon.Open();
                        SqlDataReader sdr = comm.ExecuteReader();
                        if (sdr.Read() == true)
                        {
                            int eAccess = sdr.GetInt32(2);
                            if (eAccess == 1)
                            {
                                frmAdmin ad = new frmAdmin();
                                ad.Show();
                                this.Hide();
                            }
                            else
                            {
                                frmEmployee emp = new frmEmployee();
                                emp.Show();
                                this.Hide();
                            }
                        }
                        else
                        {
                            MessageBox.Show("Incorrect username and/or password!", "", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                        }
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                    }
                    finally
                    {
                        openCon.Close();
                    }
                }
            }
        }