public static void GetFirstAndLastFileDates(string fileName,
out DateTime? dateFirst, out DateTime? dateLast, out bool endsUpNewLine)
{
dateFirst = null;
dateLast = null;
endsUpNewLine = false;
if (!File.Exists(fileName)) return;
using (var sr = new StreamReaderLog(fileName))
{
// получить первую строку
while (!sr.EndOfStream)
{
var line = sr.ReadLine();
if (string.IsNullOrEmpty(line)) continue;
try
{
if (!dateFirst.HasValue) dateFirst = DateTime.ParseExact(line, "ddMMyyyy", CultureProvider.Common);
else
{
var parts = line.Split(' ');
var nH = int.Parse(parts[0].Substring(0, 2));
var nM = int.Parse(parts[0].Substring(2));
dateFirst = dateFirst.Value.AddMinutes(nM + nH * 60);
break;
}
}
catch
{
return;
}
}
if (sr.EndOfStream) return;
// получить последнюю строку
var strLast = ReadEndTokens(sr.BaseStream, 1500, Encoding.ASCII, "\n");
if (!string.IsNullOrEmpty(strLast))
if (strLast[strLast.Length - 1] == '\n')
endsUpNewLine = true;
var quoteLines = strLast.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
int? lastHour = null, lastMin = null;
for (var i = quoteLines.Length - 1; i >= 0; i--)
{
var quoteLineParts = quoteLines[i].Split(' ');
if (quoteLineParts.Length == 3 && lastHour.HasValue == false)
{
lastHour = int.Parse(quoteLineParts[0].Substring(0, 2));
lastMin = int.Parse(quoteLineParts[0].Substring(2));
continue;
}
if (quoteLineParts.Length == 1)
{
dateLast = DateTime.ParseExact(quoteLines[i], "ddMMyyyy", CultureProvider.Common);
if (lastHour.HasValue)
dateLast = dateLast.Value.AddMinutes(lastMin.Value + lastHour.Value * 60);
break;
}
}
}
}
public static void GetFirstAndLastFileDates(string fileName,
out DateTime?dateFirst, out DateTime?dateLast, out bool endsUpNewLine)
{
dateFirst = null;
dateLast = null;
endsUpNewLine = false;
if (!File.Exists(fileName))
{
return;
}
using (var sr = new StreamReaderLog(fileName))
{
// получить первую строку
while (!sr.EndOfStream)
{
var line = sr.ReadLine();
if (string.IsNullOrEmpty(line))
{
continue;
}
try
{
if (!dateFirst.HasValue)
{
DateTime lineDate;
if (!DateTime.TryParseExact(line, "ddMMyyyy", CultureProvider.Common, DateTimeStyles.None, out lineDate))
{
Logger.DebugFormat("Файл котировок \"{0}\" - начало повреждено", fileName);
continue;
}
dateFirst = lineDate;
}
else
{
var parts = line.Split(' ');
var nH = int.Parse(parts[0].Substring(0, 2));
var nM = int.Parse(parts[0].Substring(2));
dateFirst = dateFirst.Value.AddMinutes(nM + nH * 60);
break;
}
}
catch
{
return;
}
}
if (sr.EndOfStream)
{
return;
}
// получить последнюю строку
var strLast = ReadEndTokens(sr.BaseStream, 1500, Encoding.ASCII, "\n");
if (!string.IsNullOrEmpty(strLast))
{
if (strLast[strLast.Length - 1] == '\n')
{
endsUpNewLine = true;
}
}
var quoteLines = strLast.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
int?lastHour = null, lastMin = null;
for (var i = quoteLines.Length - 1; i >= 0; i--)
{
var quoteLineParts = quoteLines[i].Split(' ');
if (quoteLineParts.Length == 3 && lastHour.HasValue == false)
{
lastHour = int.Parse(quoteLineParts[0].Substring(0, 2));
lastMin = int.Parse(quoteLineParts[0].Substring(2));
continue;
}
if (quoteLineParts.Length == 1)
{
DateTime lineDate;
if (!DateTime.TryParseExact(quoteLines[i], "ddMMyyyy",
CultureProvider.Common, DateTimeStyles.None, out lineDate))
{
continue;
}
dateLast = lineDate;
if (lastHour.HasValue)
{
dateLast = dateLast.Value.AddMinutes(lastMin.Value + lastHour.Value * 60);
}
break;
}
}
}
}
public static DateTime? GetFirstDate(string fileName)
{
if (!File.Exists(fileName)) return null;
DateTime? dateFirst = null;
using (var sr = new StreamReaderLog(fileName))
{
// получить первую строку
var linesToTryParseMax = 10;
while (!sr.EndOfStream)
{
linesToTryParseMax--;
if (linesToTryParseMax < 0) break;
var line = sr.ReadLine();
if (string.IsNullOrEmpty(line)) continue;
if (line.Length == "ddMMyyyy".Length)
{
DateTime lineDate;
if (DateTime.TryParseExact(line, "ddMMyyyy", CultureProvider.Common, DateTimeStyles.None, out lineDate))
dateFirst = lineDate;
continue;
}
if (dateFirst == null) continue;
try
{
var parts = line.Split(' ');
if (parts.Length != 3) continue;
var hour = parts[0].Substring(0, 2).ToInt();
var minute = parts[0].Substring(2).ToInt();
dateFirst = dateFirst.Value.AddMinutes(hour*60 + minute);
return dateFirst;
}
catch
{
}
}
return dateFirst;
}
}
public static DateTime?GetFirstDate(string fileName)
{
if (!File.Exists(fileName))
{
return(null);
}
DateTime?dateFirst = null;
using (var sr = new StreamReaderLog(fileName))
{
// получить первую строку
var linesToTryParseMax = 10;
while (!sr.EndOfStream)
{
linesToTryParseMax--;
if (linesToTryParseMax < 0)
{
break;
}
var line = sr.ReadLine();
if (string.IsNullOrEmpty(line))
{
continue;
}
if (line.Length == "ddMMyyyy".Length)
{
DateTime lineDate;
if (DateTime.TryParseExact(line, "ddMMyyyy", CultureProvider.Common, DateTimeStyles.None, out lineDate))
{
dateFirst = lineDate;
}
continue;
}
if (dateFirst == null)
{
continue;
}
try
{
var parts = line.Split(' ');
if (parts.Length != 3)
{
continue;
}
var hour = parts[0].Substring(0, 2).ToInt();
var minute = parts[0].Substring(2).ToInt();
dateFirst = dateFirst.Value.AddMinutes(hour * 60 + minute);
return(dateFirst);
}
catch
{
}
}
return(dateFirst);
}
}