BUG: DoBulkFieldExchange Not Called for MFC Recordset Class (187378)
The information in this article applies to:
- The Microsoft Foundation Classes (MFC), when used with:
- Microsoft Visual C++, 32-bit Enterprise Edition 5.0
- Microsoft Visual C++, 32-bit Professional Edition 5.0
This article was previously published under Q187378 SYMPTOMS
An invalid number of parameters or an assertion can occur when you attempt
to open a CRecordset derived class.
CAUSE
The MFC Recordset class binds parameters to member variables by calling the
DoFieldExchange() member function. When you use bulk row fetching, the
binding is done by calling the DoBulkFieldExchange() member function.
However when you bind parameters, MFC calls a common function, BindParams,
to perform the binding in either case. There is currently a bug with
BindParams in that it does not check to see if bulk row fetching is being
used and does not implement DoBulkFieldExchange() for binding parameters.
RESOLUTION
The best workaround for this problem is to have DoFieldExchange() call
DoBulkFieldExchange() explicitly, as in the following example:
void CBulkRecordSetSample::DoFieldExchange(CFieldExchange* pFX)
{
DoBulkFieldExchange(pFX);
}
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products
listed at the beginning of this article. We are researching this
bug and will post new information here in the Microsoft Knowledge
Base as it becomes available.
REFERENCES
Visual C++ Programmer's Guide: Adding Program Functionality; Details;
Database Topics (ODBC); Recordset (ODBC); Recordset: Fetching Records in
Bulk (ODBC)
| Modification Type: | Major | Last Reviewed: | 11/18/2003 |
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| Keywords: | kbbug kbpending KB187378 |
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