TestStand IO using c# to access sequence variables of

I have a requirement to display during execution on the IO sequence variables.

At the c# simple IO example and after reading some help files and docs, I tried two approaches. I failed to go to sequence variables.

(1) I tried to get a SequenceContext of the ExecutionMgr, but failed with the COM exceptions

(2) then tried to recover the RuntimeVariables, but even once, it failed with the COM exceptions

Is not a c# or .net expert I think I have to make a simple mistake.

Someone out there who has done this in c# and is ready to share?

I am interested in:

(1) what is the right way to access the sequence inhabitants.

(2) what event reminders to use to update GUI with the progress of the execution sequence.

If no luck I'll publish my code and problems.

With the help of Teststand 4.1 with the free version of Visual Studio 2008.

The way focused on events to do this is has your message in sequence by using the method of Thread.PostUIMessageEx of UIMsgs. The messages contain a payload of data of your sequence variables. The IO will have an event handler that receives these messages, and then you add the code in the IO to the data wherever it goes on the front panel of the IO. You must create your own messages defined by the user because TestStand lists a UIMessageCodes block. You can view messages in a code module, a stage of the trial, or use an expression TestStand API.

TestStand I (or II) course is a good example on how to do it. This seems far-fetched at first, but it's a scalable way to do. It provides a rough synchronization, you get the UIMessages from their publication.

A cool thing, is: when your IO receives a UIMessage, it can be thread.sequence the message context. So you may send a dummy message, have your event handler to get the context of the message sequence, and you will have access to the local population of sequence and all the rest.

If you want to have the read IO inhabitants of sequence by another way, I think you'd get an array of all executions that the engine has currently a Manager OI (maybe the engine), then understand that it is yours, then understand this thread in this performance is yours and then the thread and sequence etc.. It is not possible to obtain seq right context of ExecutionMgr. I personally wouldn't do it this way.

CC

Tags: NI Software

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