Requests historical data from the Data Historian.

S# Implementation
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void QueryHistory( 
   string pointname, 
   double startOADateUTC, 
   double endOADateUTC, 
   HistoricalDataResultDelegate callback, 
   object userdata 
)

Parameters

pointname

Type: string

The name of the data point.

startOADateUTC

Type: double

The start of the period.

endOADateUTC

Type: double

The end of the period.

callback

Type: HistoricalDataResultDelegate

The handler that will receive the result.

userdata

Type: object

Provides caller-specified data for the asynchronous task, which can be used to associate the request and result.

See Also