这是我的意见：
Converted Time PUMP
----------------------- --------
Do 30-Okt-2014 10:50:09 FALSE
Do 30-Okt-2014 11:23:39 TRUE
Do 30-Okt-2014 11:48:37 FALSE
Do 30-Okt-2014 12:53:34 TRUE
Do 30-Okt-2014 13:07:38 FALSE
Do 30-Okt-2014 14:36:58 TRUE
Do 30-Okt-2014 15:02:33 FALSE
Do 30-Okt-2014 16:03:59 TRUE
如果PUMP = TRUE表示泵已打开。我必须看看它每小时打开多少分钟。所以我寻找下一个PUMP = FALSE并计算分钟直到它关闭等等。最后我的输出存储在DataSet：
Hours Minutes_on
---------------------- ----------------
30.10.2014 11:00:00 25
30.10.2014 12:00:00 7
30.10.2014 13:00:00 7
30.10.2014 14:00:00 24
30.10.2014 15:00:00 2
这是我的问题，计算这个的最有效方法是什么？我现在正在使用这些步骤，但这需要很长时间：
步骤1：为每分钟的日期范围创建一个分钟数据集：
30.10.2014 11:23:00 empty
30.10.2014 11:24:00 empty
30.10.2014 11:25:00 empty
30.10.2014 11:26:00 empty
30.10.2014 11:27:00 empty
30.10.2014 11:28:00 empty
30.10.2014 11:29:00 empty
30.10.2014 11:30:00 empty
30.10.2014 11:31:00 empty
30.10.2014 11:32:00 empty
30.10.2014 11:33:00 empty
30.10.2014 11:34:00 empty
30.10.2014 11:35:00 empty
30.10.2014 11:36:00 empty
30.10.2014 11:37:00 empty
30.10.2014 11:38:00 empty
30.10.2014 11:39:00 empty
30.10.2014 11:40:00 empty
30.10.2014 11:41:00 empty
30.10.2014 11:42:00 empty
30.10.2014 11:43:00 empty
30.10.2014 11:44:00 empty
30.10.2014 11:45:00 empty
30.10.2014 11:46:00 empty
30.10.2014 11:47:00 empty
30.10.2014 11:48:00 empty
30.10.2014 11:49:00 empty
步骤2：循环输入并在我的分钟数据集中设置状态
30.10.2014 11:23:00 On '-> is in my input table
30.10.2014 11:24:00 empty
30.10.2014 11:25:00 empty
30.10.2014 11:26:00 empty
30.10.2014 11:27:00 empty
30.10.2014 11:28:00 empty
30.10.2014 11:29:00 empty
30.10.2014 11:30:00 empty
30.10.2014 11:31:00 empty
30.10.2014 11:32:00 empty
30.10.2014 11:33:00 empty
30.10.2014 11:34:00 empty
30.10.2014 11:35:00 empty
30.10.2014 11:36:00 empty
30.10.2014 11:37:00 empty
30.10.2014 11:38:00 empty
30.10.2014 11:39:00 empty
30.10.2014 11:40:00 empty
30.10.2014 11:41:00 empty
30.10.2014 11:42:00 empty
30.10.2014 11:43:00 empty
30.10.2014 11:44:00 empty
30.10.2014 11:45:00 empty
30.10.2014 11:46:00 empty
30.10.2014 11:47:00 empty
30.10.2014 11:48:00 Off '-> is in my input table
30.10.2014 11:49:00 empty
步骤3：遍历我的分钟数据集并使用正确的值设置单元格
30.10.2014 11:23:00 On
30.10.2014 11:24:00 On
30.10.2014 11:25:00 On
30.10.2014 11:26:00 On
30.10.2014 11:27:00 On
30.10.2014 11:28:00 On
30.10.2014 11:29:00 On
30.10.2014 11:30:00 On
30.10.2014 11:31:00 On
30.10.2014 11:32:00 On
30.10.2014 11:33:00 On
30.10.2014 11:34:00 On
30.10.2014 11:35:00 On
30.10.2014 11:36:00 On
30.10.2014 11:37:00 On
30.10.2014 11:38:00 On
30.10.2014 11:39:00 On
30.10.2014 11:40:00 On
30.10.2014 11:41:00 On
30.10.2014 11:42:00 On
30.10.2014 11:43:00 On
30.10.2014 11:44:00 On
30.10.2014 11:45:00 On
30.10.2014 11:46:00 On
30.10.2014 11:47:00 On
30.10.2014 11:48:00 Off
30.10.2014 11:49:00 Off
步骤4：为给定的日期范围创建一个小时数据集，并将它们的分钟数加起来On
Hours Minutes_on
---------------------- ----------------
30.10.2014 11:00:00 25
30.10.2014 12:00:00 7
30.10.2014 13:00:00 7
30.10.2014 14:00:00 24
30.10.2014 15:00:00 2
也许有任何日期功能我不知道保存一些循环？谢谢！
当前数据库查询
command.CommandText = "WITH table_ AS
(SELECT DATETIME,
TOTALTIME1,
RAWOUTPUT1,
CASE BITAND(RAWOUTPUT1, POWER(2," + (DD_einzelnePumpe.SelectedIndex - 1) + ")) 'e.g. POWER(2,0)
WHEN 0 THEN 'FALSE'
ELSE 'TRUE'
END AS Pumpe1_1,
CASE BITAND(LAG(RAWOUTPUT1) OVER (ORDER BY datetime), POWER(2," + (DD_einzelnePumpe.SelectedIndex - 1) + "))
WHEN 0 THEN 'FALSE'
ELSE 'TRUE'
END AS priv_,
CASE BITAND(LEAD(RAWOUTPUT1) OVER (ORDER BY datetime), POWER(2," + (DD_einzelnePumpe.SelectedIndex - 1) + "))
WHEN 0 THEN 'FALSE'
ELSE 'TRUE'
END AS next_
FROM pump_box_hist
WHERE DATETIME > to_date('" + Start + "','dd/mm/yyyy hh24:mi:ss')
AND DATETIME < to_date('" + Ende + "','dd/mm/yyyy hh24:mi:ss')
)
SELECT DATETIME,
TOTALTIME1,
RAWOUTPUT1,
Pumpe1_1
FROM table_
WHERE ((Pumpe1_1 = next_ or next_ is null)
AND (Pumpe1_1 <> priv_ or priv_ is null)
)";
答案 0 :(得分：1)
假设转换时间是一个实际的DateTime，为什么不简单地使用它来确定适当的开始和结束时间，然后只是calculate the difference？
添加一个无法正常工作的示例，但旨在演示其中一些概念：
internal class LogEntry
{
public LogEntry(DateTime dateTime, bool status)
{
DateTime = dateTime;
Status = status;
}
public DateTime DateTime { get; set; }
public bool Status { get; set; }
}
将结果存储在：
internal class ResultEntry
{
public ResultEntry(DateTime dateTime, int minutesOn)
{
DateTime = dateTime;
this.MinutesOn = minutesOn;
}
public DateTime DateTime { get; set; }
public int MinutesOn { get; set; }
}
快速＆amp;脏和不能正常工作：
var logs = new List<LogEntry>
{
new LogEntry(new DateTime(2015, 3, 5, 11, 10, 15), true),
new LogEntry(new DateTime(2015, 3, 5, 11, 20, 15), false),
new LogEntry(new DateTime(2015, 3, 5, 12, 30, 15), true),
new LogEntry(new DateTime(2015, 3, 5, 13, 40, 15), false),
new LogEntry(new DateTime(2015, 3, 5, 14, 50, 15), true),
new LogEntry(new DateTime(2015, 3, 5, 15, 10, 15), false)
};
var results = new List<ResultEntry>();
for (var i = 1; i < logs.Count; i++)
{
var logEntry = logs[i];
DateTime startDateTime;
DateTime endDateTime;
var roundedStartDateTime = new DateTime(logEntry.DateTime.Year, logEntry.DateTime.Month,
logEntry.DateTime.Day, logEntry.DateTime.Hour, 0, 0);
var roundedEndDateTime = roundedStartDateTime.AddHours(1);
if (logEntry.Status)
{
startDateTime = logEntry.DateTime;
endDateTime = roundedEndDateTime;
if (i < logs.Count - 1)
{
var nextLogEntry = logs[i + 1];
endDateTime = roundedEndDateTime < nextLogEntry.DateTime
? roundedEndDateTime
: nextLogEntry.DateTime;
}
}
else
{
var previousLogEntry = logs[i - 1];
startDateTime = roundedStartDateTime > previousLogEntry.DateTime
? roundedStartDateTime
: previousLogEntry.DateTime;
endDateTime = logEntry.DateTime;
}
var minutesOn = Convert.ToInt32((endDateTime - startDateTime).TotalMinutes);
results.Add(new ResultEntry(roundedStartDateTime, minutesOn));
}
编辑：我刚刚更新了主要功能;它仍然不是100％但它接近解决方案，但这是你要解决的问题。
答案 1 :(得分：0)
对于每个开始/停止周期，您可以使用以下内容：
DateTime dtStart;
DateTime dtStop;
if (dtStop.Hour > dtStart.Hour)
{
Console.WriteLine("minutes for {0} h = {1}", dtStart.Hour, 60 - dtStart.Minute);
Console.WriteLine("minutes for {0} h = {1}", dtStop.Hour, dtStop.Minute);
}
else
{
Console.WriteLine("minutes for {0} h = {1}", dtStop.Hour, dtStop.Minute - dtStart.Minute);
}