public async Task <IActionResult> Patch(int id, [FromQuery] int hid, [FromBody] JsonPatchDocument <EventViewModel> patch)
        {
            if (patch == null || id <= 0)
            {
                return(BadRequest("No data is inputted"));
            }
            if (hid <= 0)
            {
                return(BadRequest("No home is inputted"));
            }

            // Update the database
            SqlConnection  conn        = null;
            SqlCommand     cmd         = null;
            SqlDataReader  reader      = null;
            String         queryString = "";
            String         strErrMsg   = "";
            HttpStatusCode errorCode   = HttpStatusCode.OK;

            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"));
            }
            EventViewModel vm = new EventViewModel();

            try
            {
                queryString = HIHDBUtility.Event_GetNormalEventQueryString(false, usrName, null, null, null, id);

                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; // Re-throw
                    }

                    // Optimization logic for Mark as complete
                    if (patch.Operations.Count == 1 && patch.Operations[0].path == "/completeTimePoint")
                    {
                        // Only update the complete time
                        queryString = HIHDBUtility.Event_GetNormalEventMarkAsCompleteString();
                        SqlCommand cmdupdate = new SqlCommand(queryString, conn);
                        HIHDBUtility.Event_BindNormalEventMarkAsCompleteParameters(cmdupdate, DateTime.Parse((string)patch.Operations[0].value), usrName, id);

                        await cmdupdate.ExecuteNonQueryAsync();
                    }
                    else
                    {
                        cmd    = new SqlCommand(queryString, conn);
                        reader = cmd.ExecuteReader();
                        if (!reader.HasRows)
                        {
                            errorCode = HttpStatusCode.BadRequest;
                            strErrMsg = "Object with ID doesnot exist: " + id.ToString();
                            throw new Exception(strErrMsg);
                        }
                        else
                        {
                            while (reader.Read())
                            {
                                HIHDBUtility.Event_DB2VM(reader, vm, false);
                            }

                            reader.Dispose();
                            reader = null;

                            cmd.Dispose();
                            cmd = null;

                            // Now go ahead for the update
                            //var patched = vm.Copy();
                            patch.ApplyTo(vm, ModelState);
                            if (!ModelState.IsValid)
                            {
                                return(new BadRequestObjectResult(ModelState));
                            }

                            queryString = HIHDBUtility.Event_GetNormalEventUpdateString();

                            cmd = new SqlCommand(queryString, conn);
                            HIHDBUtility.Event_BindNormalEventUpdateParameters(cmd, vm, usrName);

                            Int32 nRst = await cmd.ExecuteNonQueryAsync();
                        }
                    }
                }
            }
            catch (Exception exp)
            {
#if DEBUG
                System.Diagnostics.Debug.WriteLine(exp.Message);
#endif
                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(vm, setting));
        }
        public async Task <IActionResult> Put(int id, [FromBody] EventViewModel vm)
        {
            if (vm == null || id <= 0 || id != vm.ID)
            {
                return(BadRequest("No data is inputted"));
            }
            if (vm.HID <= 0)
            {
                return(BadRequest("Home not defined"));
            }

            if (vm.Name != null)
            {
                vm.Name = vm.Name.Trim();
            }
            if (String.IsNullOrEmpty(vm.Name))
            {
                return(BadRequest("Name is a must!"));
            }

            // Update the database
            SqlConnection  conn        = null;
            SqlCommand     cmd         = null;
            SqlDataReader  reader      = null;
            String         queryString = "";
            String         strErrMsg   = "";
            HttpStatusCode errorCode   = HttpStatusCode.OK;

            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"));
            }

            try
            {
                queryString = @"SELECT [ID] FROM [dbo].[t_event] WHERE [ID] = " + vm.ID.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; // Re-throw
                    }

                    cmd    = new SqlCommand(queryString, conn);
                    reader = cmd.ExecuteReader();
                    if (!reader.HasRows)
                    {
                        errorCode = HttpStatusCode.BadRequest;
                        strErrMsg = "Object with ID doesnot exist: " + id.ToString();
                        throw new Exception(strErrMsg);
                    }
                    else
                    {
                        reader.Dispose();
                        reader = null;

                        cmd.Dispose();
                        cmd = null;

                        // Now go ahead for the creating
                        queryString = HIHDBUtility.Event_GetNormalEventUpdateString();

                        cmd = new SqlCommand(queryString, conn);
                        HIHDBUtility.Event_BindNormalEventUpdateParameters(cmd, vm, usrName);

                        Int32 nRst = await cmd.ExecuteNonQueryAsync();
                    }
                }
            }
            catch (Exception exp)
            {
#if DEBUG
                System.Diagnostics.Debug.WriteLine(exp.Message);
#endif
                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(vm, setting));
        }