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How to expand/collapse all in a hierarchical grid?

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Dorian
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Dorian asked on 27 Nov 2012, 01:27 PM
Greetings,

I  have a hierarchical grid which supports N levels and I need to add buttons for expand/collapse all the nested grids.
This is the example of my code:

Example

Every time the "Add Expression" button is pressed, a new row is added with a sub-grid and I need to expand/collapse the rows in all the levels.
Please I wonder if someone could help me with this problem, I've been trying many solutions but without good results.
Thanks,


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