private void btnLogin_Click(object sender, EventArgs e) { SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=QLKS;Integrated Security=True"); String ChucVu = ""; if (rdoQuanly.Checked == true) { try { ChucVu = "QuanLy"; SqlDataAdapter dta = new SqlDataAdapter("Select * From NHANVIEN Where TAIKHOAN = '" + txtUser.Text + "' and MATKHAU = '" + txtPass.Text + "' and CHUCVU = 'QuanLy'", con); DataTable dtb = new DataTable(); dta.Fill(dtb); if (dtb.Rows[0][0].ToString() != "NULL") { lblMA.Text = dtb.Rows[0][0].ToString(); con.Close(); try{ con.Open(); SqlCommand cmd = new SqlCommand("SP_Login", con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add(new SqlParameter("@MSNV", lblMA.Text)); cmd.Parameters.Add(new SqlParameter("@TAIKHOAN", txtUser.Text)); cmd.Parameters.Add(new SqlParameter("@MATKHAU", txtPass.Text)); if (cmd.ExecuteNonQuery() > 0) { MessageBox.Show("Dang Nhap thanh cong"); } else { MessageBox.Show("Dang Nhap Khong thanh cong"); } } catch (Exception ex) { MessageBox.Show("Loi ket noi " + ex.Message, "Thong bao");// thong bao loi } this.Hide(); TrangChu tc = new TrangChu(); tc.Show(); } else { MessageBox.Show("Tai khong hoac mat khau khong chinh xac!", "Thong Bao", MessageBoxButtons.OK, MessageBoxIcon.Information); } } catch (Exception ex) { } } else { try { ChucVu = "NhanVien"; SqlDataAdapter dta = new SqlDataAdapter("Select * From NHANVIEN Where TAIKHOAN = '" + txtUser.Text + "' and MATKHAU = '" + txtPass.Text + "' and CHUCVU = 'NhanVien'", con); DataTable dtb = new DataTable(); dta.Fill(dtb); if (dtb.Rows[0][0].ToString() != "NULL") { lblMA.Text = dtb.Rows[0][0].ToString(); con.Close(); try { con.Open(); SqlCommand cmd = new SqlCommand("SP_Login", con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add(new SqlParameter("@MSNV", lblMA.Text)); cmd.Parameters.Add(new SqlParameter("@TAIKHOAN", txtUser.Text)); cmd.Parameters.Add(new SqlParameter("@MATKHAU", txtPass.Text)); if (cmd.ExecuteNonQuery() > 0) { MessageBox.Show("Dang Nhap thanh cong"); } else { MessageBox.Show("Dang Nhap Khong thanh cong"); } } catch (Exception ex) { MessageBox.Show("Loi ket noi " + ex.Message, "Thong bao");// thong bao loi } this.Hide(); TrangChu tc = new TrangChu(); tc.Show(); } else { MessageBox.Show("Tai khong hoac mat khau khong chinh xac!", "Thong Bao", MessageBoxButtons.OK, MessageBoxIcon.Information); } } catch (Exception ex) { } } con.Close(); lblCB.Text = "Tai khong hoac mat khau khong chinh xac!"; }