private void OnWordHeader2VM(SqlDataReader reader, LearnEnWordViewModel vm)
        {
            var idx = 0;

            vm.ID   = reader.GetInt32(idx++);
            vm.HID  = reader.GetInt32(idx++);
            vm.Word = reader.GetString(idx++);

            if (!reader.IsDBNull(idx))
            {
                vm.CreatedBy = reader.GetString(idx++);
            }
            else
            {
                ++idx;
            }
            if (!reader.IsDBNull(idx))
            {
                vm.CreatedAt = reader.GetDateTime(idx++);
            }
            else
            {
                ++idx;
            }
            if (!reader.IsDBNull(idx))
            {
                vm.UpdatedBy = reader.GetString(idx++);
            }
            else
            {
                ++idx;
            }
            if (!reader.IsDBNull(idx))
            {
                vm.UpdatedAt = reader.GetDateTime(idx++);
            }
            else
            {
                ++idx;
            }
        }
        public async Task <IActionResult> Post([FromBody] LearnEnWordViewModel vm)
        {
            String usrName = String.Empty;

            if (Startup.UnitTestMode)
            {
                usrName = UnitTestUtility.UnitTestUser;
            }
            else
            {
                var usrObj = HIHAPIUtility.GetUserClaim(this);
                usrName = usrObj.Value;
            }
            if (String.IsNullOrEmpty(usrName))
            {
                return(BadRequest("User cannot recognize"));
            }

            if (vm == null)
            {
                return(BadRequest("No data is inputted"));
            }
            if (vm.HID <= 0)
            {
                return(BadRequest("No Home Inputted"));
            }

            if (vm.Word != null)
            {
                vm.Word = vm.Word.Trim();
            }
            if (String.IsNullOrEmpty(vm.Word))
            {
                return(BadRequest("Word is a must!"));
            }
            if (vm.Explains == null || vm.Explains.Count <= 0)
            {
                return(BadRequest("Explain is a must"));
            }

            // Update the database
            SqlConnection  conn        = null;
            SqlCommand     cmd         = null;
            SqlDataReader  reader      = null;
            String         queryString = "";
            Int32          nNewID      = -1;
            String         strErrMsg   = "";
            SqlTransaction tran        = null;
            HttpStatusCode errorCode   = HttpStatusCode.OK;

            try
            {
                queryString = @"SELECT [ID] FROM [dbo].[t_learn_enword] WHERE [Word] = N'" + vm.Word + "' AND [HID] = " + vm.HID.ToString();

                using (conn = new SqlConnection(Startup.DBConnectionString))
                {
                    await conn.OpenAsync();

                    // Check Home assignment with current user
                    try
                    {
                        HIHAPIUtility.CheckHIDAssignment(conn, vm.HID, usrName);
                    }
                    catch (Exception)
                    {
                        errorCode = HttpStatusCode.BadRequest;
                        throw;
                    }

                    cmd    = new SqlCommand(queryString, conn);
                    reader = cmd.ExecuteReader();
                    if (reader.HasRows)
                    {
                        Int32 nDuplicatedID = -1;
                        while (reader.Read())
                        {
                            nDuplicatedID = reader.GetInt32(0);
                            break;
                        }

                        errorCode = HttpStatusCode.BadRequest;
                        throw new Exception("Object with name already exists: " + nDuplicatedID.ToString());
                    }
                    else
                    {
                        reader.Dispose();
                        reader = null;

                        cmd.Dispose();
                        cmd = null;

                        // Now go ahead for the creating
                        queryString = @"INSERT INTO [dbo].[t_learn_enword]
                                   ([HID]
                                   ,[Word]
                                   ,[CREATEDBY]
                                   ,[CREATEDAT])
                             VALUES
                                   (@HID
                                   ,@Word
                                   ,@CREATEDBY
                                   ,@CREATEDAT); SELECT @Identity = SCOPE_IDENTITY();";

                        tran = conn.BeginTransaction();

                        // Header
                        cmd = new SqlCommand(queryString, conn, tran);

                        cmd.Parameters.AddWithValue("@HID", vm.HID);
                        cmd.Parameters.AddWithValue("@Word", vm.Word);
                        cmd.Parameters.AddWithValue("@CREATEDBY", usrName);
                        cmd.Parameters.AddWithValue("@CREATEDAT", vm.CreatedAt);
                        SqlParameter idparam = cmd.Parameters.AddWithValue("@Identity", SqlDbType.Int);
                        idparam.Direction = ParameterDirection.Output;

                        Int32 nRst = await cmd.ExecuteNonQueryAsync();

                        nNewID = (Int32)idparam.Value;
                        vm.ID  = nNewID;

                        cmd.Dispose();
                        cmd = null;

                        // Explains
                        foreach (var exp in vm.Explains)
                        {
                            queryString = @"INSERT INTO [dbo].[t_learn_enwordexp]
                                       ([WORDID]
                                       ,[ExpID]
                                       ,[POSAbb]
                                       ,[LangKey]
                                       ,[ExpDetail])
                                 VALUES
                                       (@WORDID
                                       ,@ExpID
                                       ,@POSAbb
                                       ,@LangKey
                                       ,@ExpDetail)";
                            cmd         = new SqlCommand(queryString, conn, tran);

                            cmd.Parameters.AddWithValue("@WORDID", vm.ID);
                            cmd.Parameters.AddWithValue("@ExpID", exp.ExpID);
                            if (String.IsNullOrEmpty(exp.POSAbb))
                            {
                                cmd.Parameters.AddWithValue("@POSAbb", DBNull.Value);
                            }
                            else
                            {
                                cmd.Parameters.AddWithValue("@POSAbb", exp.POSAbb);
                            }
                            cmd.Parameters.AddWithValue("@LangKey", exp.LanguageKey);
                            cmd.Parameters.AddWithValue("@ExpDetail", exp.Detail);

                            await cmd.ExecuteNonQueryAsync();

                            cmd.Dispose();
                            cmd = null;
                        }

                        tran.Commit();
                    }
                }
            }
            catch (Exception exp)
            {
#if DEBUG
                System.Diagnostics.Debug.WriteLine(exp.Message);
#endif

                if (tran != null)
                {
                    tran.Rollback();
                }

                strErrMsg = exp.Message;
                if (errorCode == HttpStatusCode.OK)
                {
                    errorCode = HttpStatusCode.InternalServerError;
                }
            }
            finally
            {
                if (tran != null)
                {
                    tran.Dispose();
                    tran = null;
                }
                if (reader != null)
                {
                    reader.Dispose();
                    reader = null;
                }
                if (cmd != null)
                {
                    cmd.Dispose();
                    cmd = null;
                }
                if (conn != null)
                {
                    conn.Dispose();
                    conn = null;
                }
            }

            if (errorCode != HttpStatusCode.OK)
            {
                switch (errorCode)
                {
                case HttpStatusCode.Unauthorized:
                    return(Unauthorized());

                case HttpStatusCode.NotFound:
                    return(NotFound());

                case HttpStatusCode.BadRequest:
                    return(BadRequest(strErrMsg));

                default:
                    return(StatusCode(500, strErrMsg));
                }
            }

            vm.ID = nNewID;
            var setting = new Newtonsoft.Json.JsonSerializerSettings
            {
                DateFormatString = HIHAPIConstants.DateFormatPattern,
                ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver()
            };

            return(new JsonResult(vm, setting));
        }
        public async Task <IActionResult> Get([FromQuery] Int32 hid, Int32 top = 100, Int32 skip = 0)
        {
            if (hid <= 0)
            {
                return(BadRequest("No Home Inputted"));
            }

            String usrName = String.Empty;

            if (Startup.UnitTestMode)
            {
                usrName = UnitTestUtility.UnitTestUser;
            }
            else
            {
                var usrObj = HIHAPIUtility.GetUserClaim(this);
                usrName = usrObj.Value;
            }
            if (String.IsNullOrEmpty(usrName))
            {
                return(BadRequest("User cannot recognize"));
            }

            BaseListViewModel <LearnEnWordViewModel> listVm = new BaseListViewModel <LearnEnWordViewModel>();
            SqlConnection  conn        = null;
            SqlCommand     cmd         = null;
            SqlDataReader  reader      = null;
            String         queryString = "";
            String         strErrMsg   = "";
            HttpStatusCode errorCode   = HttpStatusCode.OK;

            try
            {
                queryString = this.getQueryString(true, top, skip, null, hid);

                using (conn = new SqlConnection(Startup.DBConnectionString))
                {
                    await conn.OpenAsync();

                    // Check Home assignment with current user
                    try
                    {
                        HIHAPIUtility.CheckHIDAssignment(conn, hid, usrName);
                    }
                    catch (Exception)
                    {
                        errorCode = HttpStatusCode.BadRequest;
                        throw;
                    }

                    cmd    = new SqlCommand(queryString, conn);
                    reader = cmd.ExecuteReader();

                    if (reader.HasRows)
                    {
                        while (reader.Read())
                        {
                            listVm.TotalCount = reader.GetInt32(0);
                            break;
                        }
                    }
                    reader.NextResult();
                    if (reader.HasRows)
                    {
                        while (reader.Read())
                        {
                            LearnEnWordViewModel vm = new LearnEnWordViewModel();
                            OnWordHeader2VM(reader, vm);
                            listVm.Add(vm);
                        }
                    }
                }
            }
            catch (Exception exp)
            {
                System.Diagnostics.Debug.WriteLine(exp.Message);
                strErrMsg = exp.Message;
                if (errorCode == HttpStatusCode.OK)
                {
                    errorCode = HttpStatusCode.InternalServerError;
                }
            }
            finally
            {
                if (reader != null)
                {
                    reader.Dispose();
                    reader = null;
                }
                if (cmd != null)
                {
                    cmd.Dispose();
                    cmd = null;
                }
                if (conn != null)
                {
                    conn.Dispose();
                    conn = null;
                }
            }

            if (errorCode != HttpStatusCode.OK)
            {
                switch (errorCode)
                {
                case HttpStatusCode.Unauthorized:
                    return(Unauthorized());

                case HttpStatusCode.NotFound:
                    return(NotFound());

                case HttpStatusCode.BadRequest:
                    return(BadRequest(strErrMsg));

                default:
                    return(StatusCode(500, strErrMsg));
                }
            }

            var setting = new Newtonsoft.Json.JsonSerializerSettings
            {
                DateFormatString = HIHAPIConstants.DateFormatPattern,
                ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver()
            };

            return(new JsonResult(listVm, setting));
        }