private void button2_Click(object sender, EventArgs e) { string User = txtUser.Text.Trim(); string Pass = txtPass.Text.Trim(); Teacher obj = new Teacher(); DataTable dt = new DataTable(); dt = login.Get_LoginBUS(User, Pass); if (dt.Rows.Count == 1) { Properties.Settings.Default.Pass = Pass; Properties.Settings.Default.ID_User = dt.Rows[0]["id"].ToString(); obj.Id = dt.Rows[0]["id"].ToString(); obj.Name = dt.Rows[0]["name"].ToString(); obj.User = dt.Rows[0]["username"].ToString(); obj.Password = dt.Rows[0]["password"].ToString(); obj.Avatar = dt.Rows[0]["avatar"].ToString(); Properties.Settings.Default.objTeacher = obj; this.Visible = false; FormHome frm = new FormHome(); frm.ShowDialog(); } else { lbloi.Text = "Bạn nhập sai tên hoăc mật khẩu"; } // lbloi.Text = login.Get_LoginBUS(User, Pass).Rows[0]["id"].ToString(); ; }