Is it possible to programmatically access the security / access control information (that dictates read/write access) for a PI Point using the AFSDK?
If not, is it possible using the PISDK?
Is it possible to programmatically access the security / access control information (that dictates read/write access) for a PI Point using the AFSDK?
If not, is it possible using the PISDK?
Here is a little code snippet that will get the PIPoint property from an AF attribute and then load and print all of the PIPoint attributes and their corresponding values.
PISystems myPiSystems = new PISystems();
PISystem myPiSystem = myPiSystems.DefaultPISystem;
AFDatabase myDb = myPiSystem.Databases["Test"];
AFElement myElement = myDb.Elements["Test"];
AFAttribute myAttribute = myElement.Attributes["Sinusoid"];
object drAttrValue;
myAttribute.PIPoint.LoadAttributes();
IEnumerable<string> list = myAttribute.PIPoint.FindAttributeNames(null);
Console.WriteLine("Found PIPoint Attributes: nameFilter='<null>'");
foreach (string item in list)
{
drAttrValue = myAttribute.PIPoint.GetAttribute(item);
Console.WriteLine(" {0} = '{1}'", item, drAttrValue);
}
Console.ReadLine();
--Vince
Thanks folks! I'll try this out. I wasn't looking in that direction so thank you very much for the pointer.
A minor remark, for PIPoint.LoadAttributes if supplied with null or an empty list, then all PIPoint attributes will be loaded. If multiple PIPoints are being accessed, use the bulk call PIPointList.LoadAttributes for improved performance.
To load specific PIPoint Attributes refer to the latter portion of the example in documentation.
In AF SDK, you can load a PI Point along with required attributes using the PIPoint.FindPIPoints which has an overload for IEnumerable<string> attributeNames.
The attributenames are available in the PICommonPointAttributes Class, and in your case you can use the DataAccess/DataSecurity fields.