Adding unique ID to Blocks and then color it

[vyshakhgnair_cvr]

How to add a unique id to each block in a model in Autocad so that it can retrieve using Autodesk api to color specific blocks?

[paullimapa]

AutoCAD Blocks support Attributes which can have a unique value.

Perhaps you can try exploring this option?

[vyshakhgnair_cvr]

Yeah, I have tried to implement that but I could implement that only in the formats such as dwg, dwf. And couldn't find any API documentation which tries to extract value embedded in a file. 

[paullimapa · Accepted solution]

I though you were only addressing dwg files then the following may be of interest to you:

https://forums.autodesk.com/t5/net/reg-extract-attributes-without-opening-drawing-file/td-p/5455950

Here's a method using ObjectARX:

https://adndevblog.typepad.com/autocad/2012/12/get-the-attribute-values-from-block-references-insert...

Then there are products that can extract attributes without AutoCAD:

https://www.autodwg.com/AttributeExtraction/

[vyshakhgnair_cvr]

Thank you I'll go through these. 

[paullimapa]

glad to have helped...cheers!!!