On Fri, 10 Oct 2008, Dusan Halicky wrote:
> I'm trying to create "lightweight xml dataset" derived from TDataSet. > I've studied various other datasets (TFixedFormatDataset, > TParadoxDataset, TMemDataSet) but it's too complicated, perhaps > because there are no comments at all. Can someone help me at least > with some info how it works? Is there any documentation on datasets? > > Right now I'm trying to create some dataset which return static data > (e.g. table of numbers from 1 to 100 in column1 and random strings in > column2, some boolean in column3). I finally have something in the > dbgrid but it acts weird, I have no idea how to handle data. > > The reason I need my own dataset is that I am creating 3-tier > application in lazarus. The key feature why I need proper dataset is > that If I select too many data, e.g. 10k rows table, the dataset will > fetch only few lines and then when user scroll the dbgrid new data > will be fetched. As far as I know, this can be done only in TDataSet. There are some TXMLDataset implementations. The one on http://openfmi.net/projects/xmldataset was developed for FPC. Michael. _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
