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SequenceFileTranslator -> picking a specific one programatically

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Hi y'all,

 

I have stumbled over the Sequence File Translator API in TestStand. Though it is not doumented too much, I think I can get the stuff to work using the examples and template.

 

My use case at the moment is being able to mass-convert a massive amount of proprietary XML files into seq files. Before getting into the nitty-gritty details of the actual conversion, I want to make sure, the "infrastructure" structure works.


The idea is to prgramatically open all XML files one by one and using a custom SequenceTranslator DLL for conversion.

 

Using one of the examples that NI provides, I can open the according example file. 

 

What I haven't found out yet: how does the Engine determine, which translator to use? Does it try all registered translators until the first one returns CanTranslate = True?

 

 

 

 

 

 

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Accepted by topic author Oli_Wachno

Hi, 

 

Yes, that is correct. The engine will try all installed translators in NI and User directories until the first one returns CanTranslate = True. 

 

Regards, 

Anand Jain

NI

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Thanks for your anser and sorry to ask related/ further questions:

 

1.) which is the sequence, the callbacks are used in by SeqEdit?

"Debuggin" using the LabVIEW Example and Dialog Boxes, I see that 

  • GetTranslatorCount
  • GetExtension
  • GetDescription

are called on starting SeqEdit.

 

Placing a dialog box in TranslateToSequence causes TS to hang when starting an actual conversion

Dialog Boxes in GetFileVersion and GetFileFormatVersions never appear

 

2.) [Personal lack of proficiency creating DLLs from LabVIEW]

 

Referring to the XML Sample Project from the TestStand example: there must be some kind of translation from XMLGetCalcCount.vi to the DLL Callback GetCalcCount

I suspected this to happen in the build spec, but couldn't find it.

 

 

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as for part two of my question:

 

typical case of wood and trees 

Oli_Wachno_0-1707748055611.png

 

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For future reference:

 

setting up LabVIEW to debug a SequenceFileTranslator, refer to 

 

https://lavag.org/topic/6964-debugging-a-compiled-labview-dll/

 

Though the post is ~16 years old, it this still works as described here 😀

 

 

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