private IEnumerable <HistoryData> ReadFromFile(DateTime start, DateTime end)
{
int eyear = end.Year;
int syear = start.Year;
int emonth = end.Month;
int smonth = start.Month;
int year = syear;
while (year <= eyear)
{
int month = (year == syear ? smonth : 1);
while (month <= (year == eyear ? emonth : 12))
{
var result = HDAIOHelper.LoadFromFile((year == syear && month == smonth ? start : new DateTime(year, month, 1)),
(year == eyear && month == emonth ? end : new DateTime(year, month, 1).AddMonths(1).AddMilliseconds(-2)));//考虑按月遍历
if (result != null)
{
foreach (var data in result)
{
yield return(data);
}
}
month++;
}
year++;
}
}
public IEnumerable <HistoryData> ReadRaw(DateTime start, DateTime end, short ID)
{
if (end < start)
{
return(null);
}
try
{
if (HDAIOHelper.FindFile(end) && (DateTime.Today > end.Date))
{
return(ReadFromFile(start, end, ID));
}
return(group.SendHdaRequest(start, end, ID));
}
catch (Exception exp)
{
App.AddErrorLog(exp);
return(null);
}
}
/// <summary>
/// 从文件或者数据库中获取归档的数据
/// </summary>
/// <param name="start"></param>
/// <param name="end"></param>
/// <returns></returns>
private IEnumerable <HistoryData> GetHData(DateTime start, DateTime end)
{
if (start > end)
{
yield break;
}
DateTime now = DateTime.Now;
if (start > now)
{
yield break;
}
if (end > now)
{
end = now;
}
//if (now.Date > start.Date)
//{
// DateTime tempstart = DateTime.MinValue;
// DateTime tempend = end;
// HDAIOHelper.GetRangeFromDatabase(null, ref tempend, ref tempstart);
// if (tempend > start)
// {
// int eyear = tempend.Year;
// int syear = start.Year;
// int emonth = tempend.Month;
// int smonth = start.Month;
// int year = syear;
// while (year <= eyear)
// {
// int month = (year == syear ? smonth : 1);
// while (month <= (year == eyear ? emonth : 12))
// {
// var result = HDAIOHelper.LoadFromFile((year == syear && month == smonth ? start : new DateTime(year, month, 1)),
// (year == eyear && month == emonth ? tempend : new DateTime(year, month, 1).AddMonths(1).AddMilliseconds(-2)));//考虑按月遍历
// if (result != null)
// {
// foreach (var data in result)
// {
// yield return data;
// }
// }
// month++;
// }
// year++;
// }
// }
//}
var tempdata = _hda.ToArray();
DateTime ftime = (tempdata.Length > 0 ? tempdata[0].TimeStamp : DateTime.Now);
if (start < ftime)
{
var result = HDAIOHelper.LoadFromDatabase(start, ftime > end ? end : ftime);//范围冲突
if (result != null)
{
foreach (var data in result)
{
yield return(data);
}
}
}
if (end > ftime)
{
var result = tempdata.Where(x => x.TimeStamp >= ftime && x.TimeStamp <= end);
if (result != null)
{
foreach (var data in result)
{
yield return(data);
}
}
}
yield break;
}
