public PIPointStepAttribute(string piPointName, string piServerName)
{
FindPIPoint findPIPoint = new FindPIPoint(piPointName, piServerName);
PIPoint piPoint = findPIPoint.piPoint;
piPoint.LoadAttributes(PICommonPointAttributes.Step);
object step = piPoint.GetAttribute(PICommonPointAttributes.Step);
if (Convert.ToInt32(step) == 1)
{
isStep = true;
}
else
{
isStep = false;
}
}
private AFValue Calculate(AFTime time, AFAttributeList inputAttributes, AFValues inputValues)
{
if (time == null) {
throw new ArgumentException("No timestamp");
}
if (inputAttributes == null || inputAttributes.Count == 0) {
throw new ArgumentException("No input attributes");
}
try {
PIPoint tag = inputAttributes[0].PIPoint;
if (tag == null) {
throw new ArgumentException("No PI point");
}
tag.LoadAttributes(PropertyName);
object result = tag.GetAttribute(PropertyName);
return new AFValue(base.Attribute, result, time, Attribute.DefaultUOM);
} catch {
throw new ArgumentException("Failed extracting tag property");
}
}