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[英]2 of 4 System.Threading.Timers don't start on the server, but runs fine locally
[英]Accuracy of the System.Threading.Timers in windows service
我已經在C#.NET
開發了Windows服務。 在此,我使用了System.Threading.Timer
。 當我啟動10秒間隔計時器時,執行時間之間會有一些差異。
//code
public void SetTimers(int timer, DataRow row)
{
TimeSpan dueTime;
TimeSpan interval;
SetTimeIntervals(row, out dueTime, out interval);
timer1[timer] = new System.Threading.Timer(databaseTrensfer, row, dueTime, interval);
}
public void databaseTrensfer()
{
//code
}
private void SetTimeIntervals(DataRow row, out TimeSpan tsDueTime, out TimeSpan tsPeriod)
{
string alarmType = Convert.ToString(row["EBase"]);
string EType = Convert.ToString(row["EType"]);
string EFrequency = Convert.ToString(row["EFrequncy"]);
if (alarmType == "Milisecond")
{
int frquency1 = Convert.ToInt32(row["Tfrquency"]);
tsDueTime = new TimeSpan(0, 0, 0, 0, frquency1);//frquency1=interval
tsPeriod = new TimeSpan(0, 0, 0, 0, frquency1);
}
else if (alarmType == "Second")
{
int frquency1 = Convert.ToInt32(row["Tfrquency"]);
tsDueTime = new TimeSpan(0, 0, 0, frquency1);
tsPeriod = new TimeSpan(0, 0, 0, frquency1);
}
else if (alarmType == "Once")
{
tsDueTime = new TimeSpan(0, 0, 0);
tsPeriod = new TimeSpan(0, 0, 0);
}
else if (alarmType == "Minute")
{
int frquency1 = Convert.ToInt32(row["Tfrquency"]);
tsDueTime = new TimeSpan(0, frquency1, 0);
tsPeriod = new TimeSpan(0, frquency1, 0);
}
else if (alarmType == "Hour")
{
int minute = 0;
int frquency1 = 1;
if (Convert.ToString(row["RelativeFactor"]) != "")
minute = Convert.ToInt32(row["RelativeFactor"]);
if (Convert.ToString(row["Tfrquency"]) != "")
frquency1 = Convert.ToInt32(row["Tfrquency"]);
tsDueTime = new TimeSpan(frquency1, minute, 0);
tsPeriod = new TimeSpan(frquency1, 0, 0);
}
else
{
tsDueTime = new TimeSpan();
tsPeriod = new TimeSpan();
}
}
我已經通過頻率設置計時器並同時啟動計時器的數量。 我的O / P:
2011-08-22 13:42:08.0
2011-08-22 13:42:18.0
2011-08-22 13:42:28.0
2011-08-22 13:42:38.15
.
.
.
2011-08-22 14:28:38.984
2011-08-22 14:28:48.984
2011-08-22 14:28:59.15
2011-08-22 14:29:09.15
2011-08-22 14:29:19.15
.
.
2011-08-22 15:14:59.953
2011-08-22 15:15:09.968
2011-08-22 15:15:19.968
我讓這個O / P計時器從變化的08秒開始,然后移到09秒。
現在我的問題是,為什么所有計時器都沒有按正確的時間執行?
有什么辦法嗎?
在每秒鍾或更長時間的間隔過后,以下嘗試將計時器與系統時鍾重新同步。
// add these fields
private TimeSpan[] _interval;
private DateTime[] _startTime;
// when you create timer1 array, need to initialize the above arrays
int len = timer1.Length;
_interval = new TimeSpan[len];
_startTime = new DateTime[len];
// change SetTimers method as follows;
public void SetTimers(int timer, DataRow row)
{
TimeSpan dueTime;
TimeSpan interval;
SetTimeIntervals(row, out dueTime, out interval);
_interval[timer] = interval;
_startTime[timer] = DateTime.Now + dueTime;
object[] obj = new object[2]{row, timer};
timer1[timer] = new System.Threading.Timer(databaseTrensfer, obj, dueTime, interval);
}
// change databaseTrensfer method as follows
public void databaseTrensfer(object state)
{
object[] obj = (object[])state;
DataRow row = (DataRow)obj[0];
string alarmType = Convert.ToString(row["EBase"]);
if (alarmType != "Milisecond" && alarmType != "Once")
{
int timer = (int)obj[1];
DateTime dt = DateTime.Now;
long elapsedMs = Convert.ToInt64((dt - _startTime[timer]).TotalMilliseconds);
long intervalMs = Convert.ToInt64(_interval[timer].TotalMilliseconds);
long remainder = elapsedMs % intervalMs;
if (remainder != 0L)
{
timer1[timer].Change(_interval[timer] - TimeSpan.FromMilliseconds(remainder), _interval[timer]);
}
}
//code
}
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