Timeout for TPagedFile.Read

Thomas Mueller — Thu, 19 Feb 2026 14:22:13 -0000

Currently the loop in TPagedFile.Read waits infinitely for being able to read from the file. This might be a problem. Therefore I propose to add a LockTimeout with a default of 5 seconds.

add a property to the class TDbf
Use it to set a similar property of TPagedFile
Use that timeout in TPagedFile.Read

I have attached the relevant patches.

Packages for Delphi 12

Thomas Mueller — Thu, 19 Feb 2026 14:02:52 -0000

I have no experience with C++ projects. Sorry.

Packages for Delphi 12

Jean-Paul Deryck — Tue, 18 Nov 2025 16:56:20 -0000

Hello M. Mueller,
I am an old user of the tdbf package, my previous compil was for RAD studio 10.2 tokyo,
I just made today the compil for Delphi 12, using the community edition, it works, when I create a new app, I can add the component.
in the second step I would like to use the same dcltdbf290.bpl on another machine where I installed the c++builder 12 community edition, After installation, I can see it in the packages list but when I create a c++ project, the component is not available from the palette, any idea of what is wrong ? Does I have to re-create the package from the c++builder edition ? If it is the case, can you remember me the procedure ?
Regards from Belgium, Jean-Paul

Packages for Delphi 13

Thomas Mueller — Fri, 12 Sep 2025 16:02:34 -0000

I just added packages for Delphi 13 and also added it to the dbfcomon.inc file. They compile, but be warned that I have not done any tests.

TlargeIntField set filter error

Paul Baker — Mon, 24 Mar 2025 18:51:24 -0000

RecordCount is similar to PhysicalRecordCount and is the physical number of records in the file, including deleted records and records excluded by the filter.

For the number of active records, use ExactRecordCount. This can take a while, as it has to filter all records.

TlargeIntField set filter error

张修利 — Mon, 24 Mar 2025 09:35:51 -0000

var
FDB:TDbf;
begin
FDB:=TDbf.Create(nil);
FDB.FilePathFull:='.\';
FDB.TableLevel:=7;
FDB.tablename :='test.dbf';
Fdb.FieldDefs.Add('prjid',ftlargeint);
Fdb.FieldDefs.Add('no',ftstring,10);
Fdb.CreateTable;
Fdb.active:=True;
Fdb.AppendRecord([3556856671915480078,'1']);
Fdb.AppendRecord([3556856671915480078,'2']);
Fdb.AppendRecord([3556856671915480017,'3']);
Fdb.Filter:='prjid=3556856671915480078';
Fdb.Filtered:=True;
DataSource1.DataSet:=FDB;
ShowMessage(IntToStr(FDB.RecordCount));
end;
filter no effective

Access violation in 64-bit, Debug

Giorgio — Tue, 08 Oct 2024 12:34:09 -0000

Thank you Giuseppe, I can compite 64 bit platform on Delphi 12.1 tieh field update now. I added your ifdef code.

Compile a 64 bit app

Giorgio — Tue, 08 Oct 2024 12:32:29 -0000

This post https://sourceforge.net/p/tdbf/discussion/107245/thread/38240a47/?limit=25#8121 suggeste me to to update the dbf.pas file as suggestet by Giuseppe Costanzo, and now it work fine.

Compile a 64 bit app

Giorgio — Tue, 08 Oct 2024 11:43:34 -0000

I've donwloaded the last tDbf 7.01 version, and changed the package for Delphi 10 in order to support version VER360 (Delphi 12). I have simply copyed the block for VER300 and replaced VER300 with VER360 in the copied new block.
Then I've compiled in 32bit platform and installed dcltdb230.bpl.
Then I switched to 64bit platform and build the tdbf230.bpl.
I've opened the demo project, added 64bit platform, and compiled it.
It runs, but if I try to update a record in "simple program", I get error "Project TDbf_Demo.exe raised exception class $C0000005 with message 'c0000005 ACCESS_VIOLATION'.
How can I use TDbf in 64 bit app?

How do I install TDBF on tool palette?

David Allen — Thu, 06 Jun 2024 06:50:02 -0000

For anyone still reading this post - the component is installed with the existing 'Data Access' components rather than getting a folder for TDBF. The trouble is there is nothing to tell one to look there so it seems like it was not installed when actually it was installed. See my Tutorial for beginners for other hints.

Recent posts to Discussion

Timeout for TPagedFile.Read

Packages for Delphi 12

Packages for Delphi 12

Packages for Delphi 13

TlargeIntField set filter error

TlargeIntField set filter error

Access violation in 64-bit, Debug

Compile a 64 bit app

Compile a 64 bit app

How do I install TDBF on tool palette?