[Lazarus] Updating a field from an OnEditButtonClick event

[Julio César Gázquez]

Hi list.

I'm using a TDBGrid component, with an OnEditButtonClick event, and a 
visible button for the first (code) column. In the event handler I open 
a search dialog, then I want to edit the dataset row and set the column 
value and also other value (that is, code and description as found in 
the search).

However, I found that in the OnEditButtonClick event I can't put the 
dataset in dsEdit state, the Edit procedure has no visible effect and 
the field assignment triggers an exception.

The same event handler attached to a regular button OnClick event works 
as intended. The dataset is a Zeos TZQuery, but I'm not sure if this 
could happen on a different kind of dataset.

Is this a known or expected behavior? There is a workaround?

Regards...

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