Simple question on AddBookmark

rbuser

Hi,
a simple but urgent question:
in Delphi 2009, how I can assign a dataset bookmark (TBytes) to
ppdbpipeline.AddBookmark that require a long integer?

Thanks in advance!
Stefano Monterisi

nardmoseley

You can typecast the TBytes as Longint. Demo 0112 in the main reports demo
shows an example of this.

myDBPipeline.AddBookmark(Longin(myBookmark));

TBytes is a dynamic array, so make sure that you keep a reference to it
around, otherwise the memory will be free'd automatically and a memory error
will result.


--
Nard Moseley
Digital Metaphors
www.digital-metaphors.com

rbuser

Hi Nard,
Sorry but it don't works;
in a set of 20 selected records, I have always the same 2-3 values as
longint;
I need to update urgently an application that have this error but this don't
works; I use a Devexpress grid for take selected records....

Stefano

nardmoseley

Did you try running demo 112 of the main reports demo project
(Demos\Reports\Demo.dpr)?

In my testing here the demo works correctly.

As test try creating an example that does not use the DevExpress grid. Use a
standard Delphi grid instead. If that works, then perhaps there is an issue
with the DevExpress grid.

As I mentioned before, TBytes is a dynamic array, so make sure that you keep
a reference to it
around, otherwise the memory will be free'd automatically. That might be
what you are experiencing. (During report generation, the report engine
calls Pipeline.GetBookmark, GotoBookmark, FreeBookmark quite a bit.
Internally the DBPipeline class keeps a cached list of bookmarks to avoid
this type of error. )

If you still have an issue create a simple example project that uses
standard Delphi components and RB. Use the DBDemos data or dump some data to
ClientDataSets. Send in zip format to support@digital-metaphors.com and we
can run it in the debugger here.


--
Nard Moseley
Digital Metaphors
www.digital-metaphors.com

rbuser

Hi Nard,
I will try with an array of Tbookmark....
Thanks for help,
Stefano Monterisi