如何跟踪现有记录并插入新记录

Question

我正在处理警报触发器应用程序，如果警报开/关，我必须插入新记录。 详细说明：

当有闹铃状态进入时，它应检查今天是否有任何报警？如果是，那么今天是否记录了同样的警报？ 如果是，则插入新记录。 如果没有则忽略已经记录的并且没有为同一个警报记录。 或者，如果今天没有录制的闹钟，则插入新的Active = true。

但是在同一天录音开启和关闭之后发生了什么，如果再次报警在同一天继续插入新记录，因为在检查现有记录时都会记录开/关。

如果第二次报警进来，我有点无能为力。

代码： D B： 报警表列：

AlarmPosition: it could be 4,23,22
Message: On/Off
IsActive: During insert record inserted as True once the trap sent it changed to false.
TrapCapDate: During insert this date updated.
TrapSentDate: once the trap sent it updated with sent datetime and change the isactive to false.

C＃：

public static void InsertSNMPOSAlarm(int alarmId, int alarmPosition, string message, int activationCode, bool isActive)
{
    try
    {
        if (message == THMessage.AlarmOn)
        {
            //check if on already recorded with today date
            if (CheckTodayAlarm(alarmId, alarmPosition, DateTime.Today,THMessage.AlarmOn))
            {
                //check if off recorded with today date.
                if (CheckTodayAlarm(alarmId, alarmPosition, DateTime.Today,THMessage.AlarmOff))
                {
                    //insert new record with today
                    using (ESEntities context = new ESEntities ())
                    {
                        context.AddToSNMPOffshoreAlarms(new SNMPOffshoreAlarm
                        {
                            AlarmID = alarmId,
                            AlarmPosition = alarmPosition,
                            Message = message,
                            UpdatedOn = DateTime.Now,
                            IsActive = isActive,
                            ActivationCode = activationCode,
                            TrapCaptureDate = DateTime.Today
                        });
                        context.SaveChanges();
                    }
                }
            }
            else
            {
                using (ESEntities context = new ESEntities ())
                {
                    context.AddToSNMPOffshoreAlarms(new SNMPOffshoreAlarm
                    {
                        AlarmID = alarmId,
                        AlarmPosition = alarmPosition,
                        Message = message,
                        UpdatedOn = DateTime.Now,
                        IsActive = isActive,
                        ActivationCode = activationCode,
                        TrapCaptureDate = DateTime.Today
                    });
                    context.SaveChanges();
                }
            }
        }
        else if (message == THMessage.AlarmOff)
        {
            if (CheckTodayAlarm(alarmId, alarmPosition, DateTime.Today,THMessage.AlarmOn))
            {
                if (!CheckTodayAlarm(alarmId, alarmPosition, DateTime.Today, THMessage.AlarmOff))
                {
                    //insert new record with today
                    using (ESEntities context = new ESEntities ())
                    {
                        context.AddToSNMPOffshoreAlarms(new SNMPOffshoreAlarm
                        {
                            AlarmID = alarmId,
                            AlarmPosition = alarmPosition,
                            Message = message,
                            UpdatedOn = DateTime.Now,
                            IsActive = isActive,
                            ActivationCode = activationCode,
                            TrapCaptureDate = DateTime.Today
                        });
                        context.SaveChanges();
                    }
                }
            }
        }
    }
    catch (System.Exception ex)
    {
        LogError(ex, "SNMPDB", "InsertSNMPOffShoreAlarm");
    }
}

private static bool CheckTodayAlarm(int alarmid, int alarmPosition, DateTime trapCaptureDate,string alarmMsg)
{
    bool exists = false;
    try
    {
        using (ESEntities context = new ESEntities ())
        {
            var query = context.SNMPOffshoreAlarms.Where(p => p.AlarmID == alarmid && 
                p.AlarmPosition == alarmPosition && p.TrapCaptureDate == trapCaptureDate
                && p.Message == alarmMsg && p.IsActive == true).FirstOrDefault();
            if (query != null)
                exists = true;
        }
    }
    catch (System.Exception ex)
    {
        LogError(ex, "SNMPDB", "CheckTodayAlarm");
    }
    return exists;
}