Number of elements in TDMS file

[knapkerd]

Is there a way to determine the number of elements in a TDMS file?  The files I am creating have several signals all of the same length.  The only way I can think of is to do this is put it in a loop and read one element at a time until it reaches the end of the file.  But, my files will have millions of elements.  Any suggestions?
 
Thanks.
--Robert

[Herbert Engels]

Use "TDMS List Contents" in order to find out which objects your file contains. Loop over the results and read the property NI_ChannelLength from all objects. Some objects (e.g. groups) will not have this property, but all channels will have it. This is the number of values in the channel. Add up the numbers and you're done. Hope that helps,Herbert

[knapkerd]

That should do it.  Thanks!
--Robert

[knapkerd]

Sorry, I jumped the gun.  I thought that I might be able to use get property from signal, but all I have is the channel name.  How do I read the length from the object? 
 
Thanks.
--Robert

[Herbert Engels]

It's a read-only property called NI_ChannelLength (data type is I64). You can see it in the TDMS File Viewer. Make sure to check the "found" output on "TDMS Get Properties", because groups and empty channels don't have that property.Herbert

[knapkerd]

Works great.  Thanks!
 
--Robert