private void btnsearch_Click(object sender, EventArgs e) { try { ClsSqlServer searchcommand = new ClsSqlServer(); DataSet dset = searchcommand.getCustomers(txtapartiment.Text); int room = Convert.ToInt32(txtapartiment.Text); if (string.IsNullOrEmpty(txtapartiment.Text)) { MessageBox.Show("Sorry, Make sure you fill the Apartment field", "Error"); } //if (room < 200 || room > 250) //{ // MessageBox.Show("Make sure you choose the room between 200 and 250.", "Error"); // txtapartiment.Focus(); //} else { txtfname.Text = dset.Tables[0].Rows[0][1].ToString(); txtlname.Text = dset.Tables[0].Rows[0][2].ToString(); cmbgender.Text = dset.Tables[0].Rows[0][3].ToString(); txtphone.Text = dset.Tables[0].Rows[0][4].ToString(); cmbpayment.Text = dset.Tables[0].Rows[0][5].ToString(); dTPicker1.Text = dset.Tables[0].Rows[0][6].ToString(); } } catch (Exception m) { MessageBox.Show("Sorry, Record doesn't exist.", "Error"); } }