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Q170119: DOC: New Record Not Inserted to the End of Recordset

Article: Q170119
Product(s): Microsoft C Compiler
Version(s): winnt:4.2,5.0
Operating System(s): 
Keyword(s): kbdocfix kbdocerr kbDAOsearch kbDatabase kbMFC kbVC kbVC420 kbVC500
Last Modified: 17-JUL-2001

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The information in this article applies to:

- The Microsoft Foundation Classes (MFC), included with:
   - Microsoft Visual C++, 32-bit Enterprise Edition, version 4.2 
   - Microsoft Visual C++, 32-bit Professional Edition, version 4.2 
   - Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0 
   - Microsoft Visual C++, 32-bit Professional Edition, version 5.0 
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SUMMARY
=======

The MFC documentation for CDaoRecordset::AddNew() and the DAO SDK documentation
for the AddNew method state:

  The position of the record depends on the type of Recordset:

  In a dynaset-type Recordset object, records are inserted at the end of the
  recordset, regardless of any sorting or ordering rules that may have been in
  effect when the recordset was opened.

The documentation is incorrect. Beginning with Jet 3.0, this behavior is not
guaranteed. The behavior was changed to improve performance as well as
concurrency issues.

To demonstrate the change in behavior, delete a record in a recordset of 300+
records and then call AddNew(). Then, traverse the recordset until you see where
the record has been added. Typically this record will be inserted in the 253rd
record rather than at the end of the recordset.

MORE INFORMATION
================

If the goal is to make the newly added record the current record, you should get
the bookmark of the last modified record and move to that bookmark.

This documentation was corrected in Visual C++ version 6.0 for Windows.

Additional query words:

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Keywords          : kbdocfix kbdocerr kbDAOsearch kbDatabase kbMFC kbVC kbVC420 kbVC500 
Technology        : kbAudDeveloper kbMFC
Version           : winnt:4.2,5.0

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