Solved

Using CDaoRecordSet::Requery to refresh records

Posted on 2000-04-02
5
306 Views
Last Modified: 2013-11-20
Hi... I'm getting Recordsets by using a SQL statement in the CDaoRecordset::Open method.... my question is, if I need another SQL statement, is there a way to refresh the records without Closing the recordset and then Opening it again?

Thanks
Skel
0
Comment
Question by:skel
5 Comments
 
LVL 4

Expert Comment

by:inpras
ID: 2678832
     CDaoDatabase db;
      db.Open("c:\\Temp\\MyDB.mdb", FALSE, FALSE, _T(""));
      CDaoRecordset rs(&db);
      rs.Open(AFX_DAO_USE_DEFAULT_TYPE, "Select * from MyTab", 0);

      db.Execute("UPDATE MyTab SET MyName = 'ABCD'", 0);
      rs.Requery();
??
0
 

Author Comment

by:skel
ID: 2678843
No.... Execute doesn'r return any records.. I meant using SELECT statement

Skel
0
 
LVL 3

Expert Comment

by:_mb_
ID: 2679177
If the recordset is opened, you can't change the SELECT statement. The only way is to change the member variables m_strFilter and/or m_strSort to create new requery-conditions before you call the requery-method.
0
 

Expert Comment

by:z2000
ID: 2679236
If you need another SQL you must close and reopen because recordset is a set of record which you selected ->if not close (to empty buffer)old data and new data is conflicted ). In case use m_strFilter& m_strSort you have to use requery function but that function call Close and Open function (if you debug into Requery you'll see)
0
 
LVL 4

Accepted Solution

by:
inpras earned 50 total points
ID: 2679355
Wel even if execute will not reurn recordset for U I think since it updates table in UR database requery should work. see what I have done for small example

      CDaoDatabase db;
      db.Open("c:\\Temp\\MyDB.mdb", FALSE, FALSE, _T(""));
      CDaoRecordset rs(&db);
      rs.Open(AFX_DAO_USE_DEFAULT_TYPE, "Select * from MyTab", 0);

      db.Execute("UPDATE MyTab SET Name = 'ABCD'", 0);
      rs.Requery();
      rs.MoveLast();
      CString strNo;
      strNo.Format("%d", rs.GetRecordCount());
      AfxMessageBox(strNo);
      db.Execute("INSERT INTO MyTab VALUES('ABCD')", 0);
      rs.Requery();
      rs.MoveLast();
      strNo.Format("%d", rs.GetRecordCount());
      AfxMessageBox(strNo);

Hope this helps
0

Featured Post

ScreenConnect 6.0 Free Trial

Want empowering updates? You're in the right place! Discover new features in ScreenConnect 6.0, based on partner feedback, to keep you business operating smoothly and optimally (the way it should be). Explore all of the extras and enhancements for yourself!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
not able to insert into temp table 68 162
Excel Use VBA to get user's Mac Address for their computer 5 176
maxBlock challenge 30 130
string initialization in java 11 113
Introduction: Displaying information on the statusbar.   Continuing from the third article about sudoku.   Open the project in visual studio. Status bar – let’s display the timestamp there.  We need to get the timestamp from the document s…
Introduction: Database storage, where is the exe actually on the disc? Playing a game selected randomly (how to generate random numbers).  Error trapping with try..catch to help the code run even if something goes wrong. Continuing from the seve…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question