}//Tag
internal virtual void UpdateAllTags(IReadValue val)
{
for (ushort idx = 0; (idx < mylength); idx++)
{
try
{
tagHendlers[idx].UpdateTag(val.ReadValue(idx, tagHendlers[idx].TagCanonicalType));
}
catch (Exception ex)
{
tagHendlers[idx].MarkTagQuality(Opc.Da.qualityBits.badCommFailure);
CommServerComponent.Tracer.TraceWarning(187, "DataBlock.UpdateAllTags",
"An exception was thrown during data read: " + ex.Message);
}
}
}
public override void Read(ReadArgs args)
{
IReadValue rv = args.Read.GetReadValue();
ValueRecord vr = args.ValueRec;
int readChar = args.ReadOne();
switch (readChar)
{
case iBoolTrue:
args.AddValue(true);
rv.ReadValue(vr, args.valPos, true);
break;
case iBoolFalse:
args.AddValue(false);
rv.ReadValue(vr, args.valPos, false);
break;
case iStringEncl:
String str = base.ReadStringStrict(args, false);
args.AddValue(str);
rv.ReadValue(vr, args.valPos, str);
break;
case iRefPrefix:
Record rc = base.ReadRef(args, false);
if (rc.RecType != RecordType.Instance && rc.RecType != RecordType.Array)
{
throw Error.UnexpectedRecordType(RecordType.Instance, rc.RecType);
}
args.AddValue(rc);
rv.ReadValue(vr, args.valPos, rc);
return;
case iDateTimePrefix:
DateTime dt = new DateTime(
ReadDateTimeDigits(args, 4),
ReadDateTimeDigits(args, 2),
ReadDateTimeDigits(args, 2),
ReadSkipOne(args, iDateTimeT).ReadDateTimeDigits(args, 2),
ReadDateTimeDigits(args, 2),
ReadDateTimeDigits(args, 2),
ReadDateTimeDigits(args, 3)
);
args.AddValue(dt);
rv.ReadValue(vr, args.valPos, dt);
break;
case iFieldSep:
args.AddValue(null);
rv.ReadValueNull(vr, args.valPos);
return;
case iRecordSep:
args.AddValue(null);
rv.ReadValueNull(vr, args.valPos);
args.State = ReaderNewRecord.Singleton;
return;
case -1:
args.AddValue(null);
rv.ReadValueNull(vr, args.valPos);
args.State = ReaderEnd.Singleton;
return;
default:
ReadNumber(args, readChar);
return;
}
// fixed width values (bool, datetime) or values with delimiter (string)
// still have one extra character to read in order to determine next step
readChar = args.ReadOne();
if (readChar == iFieldSep)
{
args.State = ReaderField.Singleton;
}
else if (readChar == iRecordSep)
{
args.State = ReaderNewRecord.Singleton;
}
else if (readChar == -1)
{
args.State = ReaderEnd.Singleton;
}
else
{
throw Error.UnexpectedChars(Constants.FieldSeparator, (char)readChar);
}
}
