[Lazarus] How TDBGrid works

[Jesus Reyes A.]

On Fri, 06 May 2016 15:07:18 -0500, Aradeonas <aradeonas at operamail.com>  
wrote:

> Thanks, It seems I should explain better.
> For RecordCount you are right and it seems DBGrid doesn't know correct  
> number either otherwise it should has a better scroll size.
>I want to do something like DBGrid and for that I want to get only a  
> part of data for example record 1000 to 1100 and for that I can >set  
> BufferCount to 100 but in this case I should navigate dataset to record  
> 1000 to get these value but I prefer to not change RecNo >and use  
> something like DataLink's ActiveRecord that changes record you want  
> without changing RecNo of Dataset.
>

You can't, there is no way using TDataset facilities. But anyway, changing  
ActiveRecord *should* change RecNo (provided that RecNo is reliable, it  
definitively is not if Dataset.IsSequenced=false OR dataset is filtered),  
if it's not then you found a bug.

> So if I have 1 Dataset that is fully load all 1500 record can I just  
> print records from 1000 to 1100 without changing RecNo?
>Regards,
> Ara
>

Jesus Reyes A.
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