Need help for write value on extension object array

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UlrichFM
Jr. Member
Jr. Member
Posts: 4
Joined: 08 Apr 2021, 08:55

Need help for write value on extension object array

Post by UlrichFM »

Hello,

I managed to write to an integer variable, but now I can't find the correct syntax for the extensionObject .
For example, I manage to read a value in an extensionObject array like by filling in the following element :
a_pResults.Value.Value.Array.Value.ExtensionObjectArray[0].Body.Binary.Data[4]
and it return the correct value i wanted.

But, when i tried to do an assignment in this same case like this :
nodesToWrite[0].Value.Value.Value.Array.Value.ExtensionObjectArray[0].Body.Binary.Data[4] = 1;
i had an access violation error

My problem is so that i want to now to write in this same variable.
Can someone provide me with the correct syntax to write to this variable for this assignment by example please.

Thank's

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Support Team
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Posts: 2679
Joined: 18 Mar 2011, 15:09

Re: Need help for write value on extension object array

Post by Support Team »

Hi,

there is a well documented example on how to handle an extension object in the GettingStarted lesson06.

https://documentation.unified-automation.com/uasdkc/1.9.1/html/client_structure_datatypes.html

An example for writing to an array of extension objects including sample code can be found in the server lessons.
Best regards
Unified Automation Support Team

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