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JavaScript and ReadMultipleItemValues (how to pass arrays from JScript)

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11 Jun 2014 06:59 #2038 by support
Unfortunately JScript arrays are not the arrays of COM which EasyDAClient expects. The feature you mentioned has not been implemented, and there may be no solution.

If you can put in a piece of VBScript as well, try the approach suggested here: msdn.microsoft.com/en-us/library/ie/y39d47w8(v=vs.94).aspx .

Do you think this use case is important? If so, I can put it into plans for the next version.

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11 Jun 2014 06:54 - 11 Jun 2014 06:55 #2037 by support
From: C.
Sent: Tuesday, June 10, 2014 9:49 PM
To: Zbynek Zahradnik
Subject: Javascript ReadMultiple

...

I have been trying to use Javascript to read some tags and display in a webpage. I built off of the Jscript example and tried to expand it using ReadMultiplItemValues – but I can’t get it to work. I know back on our old OPC Web Client site, we have the ability to do this marked as coming in the next release. Did that ever come to fruition?

I have tried things like:
var arr = ["Channel1.Device1.Tag2","Channel1.Device1.Tag3"];
var results = EasyDAClient.ReadMultipleItemValues("", "SWToolbox.TOPServer.V5", arr);

but when I try to print out results, it is not defined. Sorry if I missed something completely obvious here.

Regards,

C.
Last edit: 11 Jun 2014 06:55 by support.

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