Get Number of Channels in TDMS Group

[Ryan-C]

When you open a TDMS file in Excel, it lists the number of channels in each group.  For example, below it lists that there are 2 channels in the Thermocouples Group, and 5 channels in the Analog Inputs Group.

It would be convenient to have a function in the LabVIEW TDM Streaming API that simply returns the number of Channels, given the Group Name.  It seems that since these values are found by the file for the purpose of the Excel Tool Add-On, that it might be a simple function call.  There is a similar call in LabWindows/CVI called TDMS_GetNumChannels.

[David_Staab]

Why not just get the channel names and run "Array Size" on the output?

[QFang]

David_Staab, 

Because if the metric is already processed and available, getting an array (list of channel names) just to use it for "array size" is a waste of memory copies and time. -But that is the way to currently do it that I have found. 🙂

[Darren]

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