Comments for Datasets without databaseshttp://dn.codegear.com/article/205872008-07-05T13:22:46-07:00Datasets without databasesPaul Normanhttp://threads.codegear.com/threads/threads.exe/userall?commentid=38932http://threads.codegear.com/threads/threads.exe/view?commentid=389322006-02-20T02:01:05-08:002006-02-20T02:01:05-08:00Datasets without databasesHere is a link to the source code:http://www.marcocantu.com/code/devnews/default.htmDatasets without databasesCraven Weaselhttp://threads.codegear.com/threads/threads.exe/userall?commentid=25754http://threads.codegear.com/threads/threads.exe/view?commentid=257542000-07-24T04:17:43-07:002000-07-24T04:17:43-07:00Datasets without databasesI've seen several listings on this same topic, and they all seem to have the same problem: The bookmarks don't work.Try this:1. Download Marco's sample from his website2. Open the demo program3. Enable multi-select on the DBGrid (Options property)4. Run the app.You'll notice that multi-select doesn't work very well at all. I've spent some time writing one of these components myself, and I honestly couldn't find one article on the subject that handles bookmarks correctly.RXTools has a TRxMemoryData component that seems to work fine, even though it is not exactly what I am looking for. I opted for a sollution where I replaced TDataSet's pretty unfriendly PChar with a class (much like the RX-guys have done) and that seems to be the only sollution that really works.Datasets without databasesCraven Weaselhttp://threads.codegear.com/threads/threads.exe/userall?commentid=25753http://threads.codegear.com/threads/threads.exe/view?commentid=257532000-07-24T03:54:08-07:002000-07-24T03:54:08-07:00Datasets without databasesI've seen several listings on this same topic, and they all seem to have the same problem: The bookmarks don't work.Try this:1. Download Marco's sample from his website2. Open the demo program3. Enable multi-select on the DBGrid (Options property)4. Run the app.You'll notice that multi-select doesn't work very well at all. I've spent some time writing one of these components myself, and I honestly couldn't find one article on the subject that handles bookmarks correctly.RXTools has a TRxMemoryData component that seems to work fine, even though it is not exactly what I am looking for. I opted for a sollution where I replaced TDataSet's pretty unfriendly PChar with a class (much like the RX-guys have done) and that seems to be the only sollution that really works.Check out the RX-Lib's TRxMemoryData ClassMichael Olschimkehttp://threads.codegear.com/threads/threads.exe/userall?commentid=25331http://threads.codegear.com/threads/threads.exe/view?commentid=253312000-06-09T10:12:11-07:002000-06-09T10:12:11-07:00Check out the RX-Lib's TRxMemoryData ClassHi,thank you for your great article...but I'm using the class TRxMemoryData included in the RX-Lib for Delphi (www.rxlib.com) (available for free with source)With that control you can create a table complete in memory. You can add records, delete records, edit records just as with a normal TTable...Really greatMichael Olschimkeolschimke@gmx.netre: Datasets without databasesMarcelo Lopez Ruizhttp://threads.codegear.com/threads/threads.exe/userall?commentid=25299http://threads.codegear.com/threads/threads.exe/view?commentid=252992000-06-07T14:03:28-07:002000-06-07T14:03:28-07:00re: Datasets without databasesI'd much rather use a TClientDataSet descendant, then, than have to support MDAC distribution!Plus, TClientDataSet is, the last time I checked, more powerful than the ADO Cursor Library - it supports, for example, keeping older versions of records for a while and then merging them.TDataSets aren't just used for different data access engines; they can also be used to manage business objects and flat files.Have a nice one,Marcelo Lopez RuizDatasets without databasesPaulo Gasparhttp://threads.codegear.com/threads/threads.exe/userall?commentid=25279http://threads.codegear.com/threads/threads.exe/view?commentid=252792000-06-05T11:02:06-07:002000-06-05T11:02:06-07:00Datasets without databasesBut it sure takes MUCH LESS code to implement the same functionality over ADO, without writing a OLE DB provider.With ADO is quite easy to build a in-memory dataset, remember?And you can even save or serialize the data using XML.So, one could write a component on top of a TAdoDstaset, for instance, with much less coding.The TDataset abstraction is quite powerful, but its usefulness does not overlap that much the usefulness of ADO. It is mean for a different thing: - a common interface for different database access implementations. And that is why it is possible to have a TAdoDataset component these days. Example: without it, wouldn't be so easy to view data from an OLE DB source using a nice TDBGrid!Have fun,PauloDatasets without databases: one word Wim De Cleenhttp://threads.codegear.com/threads/threads.exe/userall?commentid=25278http://threads.codegear.com/threads/threads.exe/view?commentid=252782000-06-05T10:45:12-07:002000-06-05T10:45:12-07:00Datasets without databases: one word A really interesting approach that can solve some really difficult problems in less time than before. I would say, thank you. And if a ever make use of it, the community will share. Datasets without databasesJon Tvetenhttp://threads.codegear.com/threads/threads.exe/userall?commentid=25266http://threads.codegear.com/threads/threads.exe/view?commentid=252662000-06-03T21:45:26-07:002000-06-03T21:45:26-07:00Datasets without databasesGood article, too bad the link to the source is wrong.