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Historian SDK

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Last Property

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Gets or sets the value returned is the last point stored with a time stamp within the retrieval cycle, if at least one non-NULL point exists for the tag in question within the retrieval cycle.

Syntax

'Declaration
 
Public Property Last As Double
'Usage
 
Dim instance As AnalogSummaryQueryResult
Dim value As Double
 
instance.Last = value
 
value = instance.Last
public double Last {get; set;}
public:
property double Last {
   double get();
   void set (    double value);
}

Property Value

If no points exist within the retrieval cycle, then the value returned is the current value at the cycle start time. If no non-NULL points can be found, then NULL is returned. If the last value is NULL, then it is represented by NaN.

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also

Reference

AnalogSummaryQueryResult Class
AnalogSummaryQueryResult Members

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