Hi Matthew,
DataFileHeaderAccess is one way to approach this, another could be to use the DataFinder API. In case the file(s) of interest are in a search area of DataFinder you can access all descriptive information such as number of channels or channel names without loading the file into the data portal.
You can either search for whole files, groups within a file or even channels which match certain criterias (such as having the same name).
The attched snippet search for channels with a specific name prefix in file(s) with a given file name and load it into the data portal.
Greetings from sunny Aachen
Stefan
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Option Explicit 'Forces the
explicit declaration of all the variables in a script.
' Connect to the DataFinder
Dim oMyDataFinder, oMyQuery, oMyResults, oMyConditions
Set oMyDataFinder = Navigator.ConnectDataFinder("My DataFinder")
' Create a query to search for channels with a specific name prefix in a a specific file
Set oMyQuery = oMyDataFinder.CreateQuery(eAdvancedQuery)
oMyQuery.ReturnType = eSearchChannel
Set oMyConditions = oMyQuery.Conditions
Call oMyConditions.Add(eSearchFile,"fileName","=","Example.tdm")
Call oMyConditions.Add(eSearchChannel,"name","=","Noise*")
Call oMyDataFinder.Search(oMyQuery)
' Load results
Navigator.LoadData(oMyDataFinder.Results)
