AnsweredAssumed Answered

The data methods PlotValues and RecordedValues are not supported on attribute

Question asked by lgferrao on Feb 5, 2015
Latest reply on Feb 9, 2015 by lgferrao


I'm trying to get attributes values to plot them in a graph. This information is importante: the graphs have more than one trend (each one from a different attribute).


To do this, I'm using the code below:


protected override IList<AFValues> GetAttributesValues(IEnumerable<string> pointNames, AFTimeRange timeRange, int intervals, PIPagingConfiguration paging)


    var attributes = AFAttribute.FindAttributesByPath(pointNames, null).Results;


    var attributesList = new AFAttributeList(attributes.Values);


    return intervals == 0 ?

        attributesList.Data.RecordedValues(timeRange, AFBoundaryType.Inside, null, true, paging).ToList() :

        attributesList.Data.PlotValues(timeRange, intervals, paging).ToList();



I'm not an expert in AF SDK, but I read that using attributesList.Data is the fastest way to retrieve values from attributes.


The problem is that the AF SDK (PI AF Client 2014 R2 - is returning a message tell me that PlotValues and RecordedValues are not supported to an specific attribute.


This attribute is configured in PI Explorer as:



I get the values from this attribute using the method GetValues, but I don't know if this is the more performatic way.


So, I need some help to develop a code that works with performance and be able to handle diferent kinds of datareference configurations.


Thank you in advance!