[Lazarus] How can I use TMemDataset

[Joost van der Sluis]

Op maandag 05-01-2009 om 14:54 uur [tijdzone +0100], schreef Gabor
Boros:

> I want to use an in memory dataset and found TMemDataset.
> But not working very well. If defined the fields in Object Incpector the 
>   whole thing unusable. Appended records with AppendRecord or with 
> Append/Edit/Post not inserted into dataset. If define fields at run-time 
> with FieldDefs.Add Append/Edit/Post working but AppendRecord not and 
> Append/Edit/Post is just working on first try. Tried with FPC 2.2.2 and 
> actual Lazarus SVN.

For a working AppendRecord (for all TDatasets) you need a recent fpc svn
version (2.2.3 or later)

I don't know how the Lazarus editor works, but for the rest, can you
provide an example?

> Anybody using TMemDateset?

If you use a recent fpc from svn you can alo use TBufDataset. It works
the same like TMemDataset but it's used as basic for a few other
datasets and is used more. (You can compare it to Delphi's
TClientDataset)

Joost.