pls check this query?

Question

 try

        {

            string query = "";

         //   query += "SELECT WOInwardEntry.InvoiceNo FROM WOInwardEntry INNER JOIN WO ON WOInwardEntry.WOCode = WO.WOCode where WOInwardEntry.WOCode = '" + ddWONumber.SelectedItem.Value + "'";

            query += "select InvoiceNo,InvoiceDate,InwardDate from WOInwardEntry where wocode ='" + ddWONumber.SelectedItem.Value + "'";

            cmd = new SqlCommand(query, cn);

            da = new SqlDataAdapter(cmd);

            da.Fill(ds);

            if ((ds != null) && (ds.Tables.Count != 0) && (ds.Tables[0].Rows.Count != 0))

            {

                txtInvoiceNo.Text = ds.Tables[0].Rows[0]["InvoiceNo"].ToString();

                txtInvoiceDate.Text = Convert.ToDateTime( ds.Tables[0].Rows[0]["InvoiceDate"]).ToString("dd-mm-yyyy");

                txtInwardDate.Text = Convert.ToDateTime(ds.Tables[0].Rows[0]["InwardDate"]).ToString("dd-mm-yyyy");

            }

            

            //FillItems();

        }

        catch { }

        finally { }

is it right to retrive more than one raw?