private void btnDangNhap_Click(object sender, EventArgs e) { SqlConnection connection = new SqlConnection(Helper.Define.dataSource); try { connection.Open(); string taiKhoan = txtTenDangNhap.Text; string matKhau = txtMatKhau.Text; string sql = "select * from DANGNHAP where Taikhoan = '" + taiKhoan + "' and Matkhau = '" + matKhau + "'"; SqlCommand cmd = new SqlCommand(sql, connection); SqlDataReader dta = cmd.ExecuteReader(); if (dta.Read() == true) { this.Hide(); frmManHinhChinh manHinhChinh = new frmManHinhChinh(); manHinhChinh.ShowDialog(); } else { MessageBox.Show("Đăng nhập thất bại!"); } } catch (Exception ex) { MessageBox.Show(ex.Message); } }
private void btnTroVeCuaLienHe_Click(object sender, EventArgs e) { frmManHinhChinh frmManHinhChinh = new frmManHinhChinh(); frmManHinhChinh.Show(); this.Hide(); }