UI Message Help - Send Array to the UI via ActiveX

[Bill_Lewis]

Hello,

I have asked a similar questoin before but now I'm having issues trying to get a array to the UI via UI messaging. I'm my TestStand code I have an expression to send a array that is located as a FileGlobal array container to the UI as such:

RunState.Thread.PostUIMessageEx(UIMsg_UserMessageBase + 2,0, "", FileGlobals.DataRead, False)

and in the UImessage callback I have what I thought I should do to send the data to a text table on the UI. This is not working.

Can someone tell me what I'm doing incorrectly?

Attached is the UIcallback, Control and a picture of the table on my UI

[JGruenberg]

You can't directly pass the data in a UIMessage.  You can, however, pass a reference to ThisContext.  Then, you can modify your UI Message Handler to query for that value, directly using TestStand - Get Property Value.

[Bill_Lewis]

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@JGruenberg wrote:

You can't directly pass the data in a UIMessage.  You can, however, pass a reference to ThisContext.  Then, you can modify your UI Message Handler to query for that value, directly using TestStand - Get Property Value.

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Like this?

[JGruenberg]

Yes, but you can use the TestStand - Get Property Value.vi directly with the TS.SequenceContext reference and avoid casting variants into other things.  

[Bill_Lewis]

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@JGruenberg wrote:

Yes, but you can use the TestStand - Get Property Value.vi directly with the TS.SequenceContext reference and avoid casting variants into other things.  

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Thanks for the help JGruenberg.

I have tried and it seems that the TS.SequecneContext is not correct or I'm not doing something correct. Attached is what i changed. Any other suggestions?

[JGruenberg]

What exactly is happening? Is that callback executing? Is there an error?

[Bill_Lewis]

Here is the error the callback is giving during the UI 10001 message

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@JGruenberg wrote:
What exactly is happening? Is that callback executing? Is there an error?

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[JGruenberg]

Your SequenceContext control is not connected to anything, so its not going to have a real value.  You need to get your sequence context from the UIMessage object's ActiveX member.  This is how you'd do that:

[Bill_Lewis]

I'm close!

I get a LabView error stating that a null value or deleted value was passed to the UImessage so I'm assuming this is because of my UI message format. Do i need to put the runstate.thiscontext? there or is this correct?

UI Message code to 10001 and 10002:

RunState.Thread.PostUIMessageEx(UIMsg_UserMessageBase + 1,0, "", Nothing, False),
RunState.Thread.PostUIMessageEx(UIMsg_UserMessageBase + 2,0, "", Nothing, False)

the step before the UI message is a multinumeric test and in the post expression I'm writing the data to the fileglobals with

FileGlobals.DataRead == Step.NumericArray

[JGruenberg]

RunState.Thread.PostUIMessageEx(UIMsg_UserMessageBase + 1,0, "", Nothing, False),
RunState.Thread.PostUIMessageEx(UIMsg_UserMessageBase + 2,0, "", Nothing, False)

"Nothing" in there should be replaced with ThisContext.  You might want to change it to be synchroneous (changing the last parameter to True).