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EAccessViolation

 
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Koko13
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PostPosted: Thu Feb 10, 2005 12:07 am    Post subject: EAccessViolation Reply with quote


I have a simple dbexpress application that uses mySQL. It has a grid and a
delete button. When I delete the first record it works fine, but when I
press delete again (to delete the next record) I get an EAccessViolation.
'Access Violation in .... dbexpmysql.dll'. Here is the code for my delete
button:

procedure TForm1.btnDeleteClick(Sender: TObject);
begin
if dm.clientdataset.State = dsEdit then
dm.clientdataset.Cancel;
dm.clientdataset.Delete;
dm.clientdataset.ApplyUpdates(0);
end;

what am I doing wrong?

thanks, koko


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paladin
Guest
PostPosted: Fri Feb 11, 2005 3:27 am    Post subject: Re: EAccessViolation Reply with quote


koko,

I tried your code and it worked with no problems
using D7.1 and mysql 3.23.58

Can you tell us what versions of things you have?

paladin




"Koko13" <koko (AT) ecst (DOT) csuchico.edu> wrote

Quote:
I have a simple dbexpress application that uses mySQL. It has a grid and a
delete button. When I delete the first record it works fine, but when I
press delete again (to delete the next record) I get an EAccessViolation.
'Access Violation in .... dbexpmysql.dll'. Here is the code for my delete
button:

procedure TForm1.btnDeleteClick(Sender: TObject);
begin
if dm.clientdataset.State = dsEdit then
dm.clientdataset.Cancel;
dm.clientdataset.Delete;
dm.clientdataset.ApplyUpdates(0);
end;

what am I doing wrong?

thanks, koko





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