//
// Download the TrendLog in many blocks of NbRecordByStep values
// it could be a (ligh) problem with sliding windows logs with high speed
// modification : it will lost some values and duplicate some others.
//
private void DownloadFullTrendLog()
{
uint ItemCount;
int Idx;
try
{
// First index is 1
Idx = 1;
do
{
byte[] TrendBuffer;
ItemCount = (uint)Math.Min(NbRecordsByStep, Logsize - Idx + 1);
if (Idx == 951)
{
Idx = 951;
}
//read
if ((comm.ReadRangeRequest(adr, object_id, (uint)Idx, ref ItemCount, out TrendBuffer) == false) || (ItemCount <= 0))
{
Trace.TraceError("Couldn't load log data");
BeginInvoke(new Action <bool>(UpdateEnd), false);
return;
}
int len = 0;
for (int itm = 0; itm < ItemCount; itm++)
{
//decode
BacnetLogRecord[] records;
int l;
if ((l = System.IO.BACnet.Serialize.Services.DecodeLogRecord(TrendBuffer, len, TrendBuffer.Length - len, CurvesNumber, out records)) < 0)
{
Trace.TraceError("Couldn't decode log data");
BeginInvoke(new Action <bool>(UpdateEnd), false);
return;
}
len += l;
//update interface
for (int i = 0; i < records.Length; i++, Idx++)
{
if (records[i].type == BacnetTrendLogValueType.TL_TYPE_UNSIGN || records[i].type == BacnetTrendLogValueType.TL_TYPE_SIGN || records[i].type == BacnetTrendLogValueType.TL_TYPE_REAL)
{
Pointslists[i].Add(new XDate(records[i].timestamp), (double)Convert.ChangeType(records[i].Value, typeof(double)));
}
else
{
Pointslists[i].Add(new XDate(records[i].timestamp), double.NaN);
}
AddToList(Idx, records[i].timestamp, records[i].type, records[i].Value, records[i].statusFlags.ConvertToInt());
}
}
// Update progress bar
BeginInvoke(new Action <int>(UpdateProgress), (int)ItemCount);
} while (((Idx + 1) < Logsize) && (StopDownload == false));
BeginInvoke(new Action <bool>(UpdateEnd), true);
}
catch (Exception ex)
{
Trace.TraceError("Error during log data: " + ex.Message);
try
{
// Exception if Form is closed
BeginInvoke(new Action <bool>(UpdateEnd), false);
}
catch { }
}
}
