Major flaw in TDataBase CLASS

[Gilbert]

Hi all,

I use a database that has 148 records in it. No indexes are used at all.

If I call oDbf:GoTop() and test the RecNo()
I get recno 14 instead of 1
If I call oDbf:GoBottom() and test the RecNo()
I get recno 142 instead of 148

Can anyone tell me why this weird result.

Regards

[Biel EA6DD]

Probably you are working with SET DELETE ON, and you have deleted records. So REcno 14 is the first non deleted record in your DBF.

PACK, or SET DELETE OFF.

[Gilbert]

Hi Biel,


It`s true I always used set delete on. I don`t want to see deleted records anyway. But my database as no deleted records.

Made a second test: if i use Clipper dbGoTop() & dbGoBottom() everything works fine. Only if I use TDataBase problem returns.


Regard

[Biel EA6DD]

Hi Gilbert,

Code: Select all  Expand view

METHOD GoTop()             INLINE ( ::nArea )->( DBGoTop() ),;
                                     If( ::lBuffer, ::Load(), )
METHOD GoBottom()          INLINE ( ::nArea )->( DBGoBottom() ),;
                                     If( ::lBuffer, ::Load(), )

Like can you see, the tDatabase is doing the same, (::nArea)->(dbGoTop()), (::Load() don't move the record pointer).

Try to execute

Code: Select all  Expand view

(oDbf:nArea)->(dbGoTop())

Check oDbf:nArea if is the correct data Area.

[Gilbert]

Hi Biel,

I finally found what the problem was. The database I was testing with contains special ASCII code that are in the range of 0 to 31. That was causing the problem. I did some testing with another database and everything works well.

Regards,