TADODataSet

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2 total messages Started by Ars Nova Mon, 20 Mar 2006 09:43

#450

Author: Ars Nova
Date: Mon, 20 Mar 2006 09:43

16 lines
1275 bytes

I want to create a TADODataSet object through new operator, and I've probed with:

     TADODataSet * objDataSet;
     
     objDataSet = new TADODataSet(NULL); 
     or
     objDataSet = new TADODataSet(this); 
     where 'this' is a    TADOConnection object reference.

In both cases this generates the follow Codeguard: 
"Method called on illegally casted object: Attempt to access 608 byte(s) at 0x01214658. The 'this' pointer points to heap block 0x01214658 which is only 604 bytes long."

How can I do it?

Thank you very much�

Re: TADODataSet

#451

Author: Rudy Veeneman
Date: Fri, 24 Mar 2006 08:02

58 lines
2467 bytes

We had the same problem with TADODataSet in CBuilder. We found a workaround 
by using a "wrapper class".

class TMyDataSet : public TADODataSet
{
private:

protected:

public:
  __fastcall virtual TMyDataSet (Classes::TComponent* AOwner);
  __fastcall virtual ~TMyDataSet (void);
};

__fastcall TMobaDataSet::TMobaDataSet(Classes::TComponent* AOwner)
  : TADODataSet(AOwner)
{
}

__fastcall TMobaDataSet::~TMobaDataSet(void)
{
}

Create a TMyDataSet object though new operator:
  TMyDataSet* objDataSet = new TMyDateSet(NULL);

Other way to solve the problem is to use TADOQuery in stead of TADODataSet.
In CBuilder 'new TADOQuery(NULL)' does not give problems with codeguard

Rudy







"Ars Nova" <lmuniz@ars-nova.net> schreef in bericht 
news:441e876e$1@newsgroups.borland.com...
>
> I want to create a TADODataSet object through new operator, and I've 
> probed with:
>
>     TADODataSet * objDataSet;
>
>     objDataSet = new TADODataSet(NULL);
>     or
>     objDataSet = new TADODataSet(this);
>     where 'this' is a    TADOConnection object reference.
>
> In both cases this generates the follow Codeguard:
> "Method called on illegally casted object: Attempt to access 608 byte(s) 
> at 0x01214658. The 'this' pointer points to heap block 0x01214658 which is 
> only 604 bytes long."
>
> How can I do it?
>
> Thank you very much�

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