Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

when DLookup function returns a NULL

Posted on 1998-07-29
3
Medium Priority
?
232 Views
Last Modified: 2008-03-03
I am trying to write a sub that will loop through my tables to check if there is an entry in each table for a given subject number.  The DLookup function is the only way I know  to read data from other tables (besides the one the form is based on) but the sub stops running every time DLookup returns a null.  Should I be using a different function or is there a way to disable the error message that appears every time DLookup returns a null?
0
Comment
Question by:alina072998
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 6

Accepted Solution

by:
devtha earned 300 total points
ID: 1957550
This example opens a Recordset and locates each record whose Title field satisfies the search criteria and copies it to the copy buffer.  The example prepares the record for subsequent editing, changes the job title, and saves the change using the Update method.

Dim Criteria As String, MyDB As Database, MySet As Recordset
Dim NewTitle As String
Criteria = "Title = 'Sales Representative'"      
' Set search criteria.
NewTitle = "Account Executive"      ' Set new job title.
Set MyDB = DBEngine.Workspaces(0).Databases(0)
Set MySet = MyDB.OpenRecordset("Employees", DB_OPEN_DYNASET)  
' Create dynaset.
MySet.FindFirst Criteria      ' Find first occurrence.
Do Until MySet.NoMatch      ' Loop until no matching records.
      MySet.Edit                  ' Enable editing.
      MySet!Title = NewTitle      ' Change title.
      MySet.Update            ' Save changes.
      MySet.FindNext Criteria      ' Find next occurrence.
Loop                         ' End of loop.


0
 

Author Comment

by:alina072998
ID: 1957551
Thanks.  I think I get it.  To look through all of my tables for the same variable,
I would need to repeat the routine but change this:

Set MySet = MyDB.OpenRecordset("Employees", DB_OPEN_DYNASET)

statement, replacing the table name each time?
  
0
 
LVL 6

Expert Comment

by:devtha
ID: 1957552
YOU GOT IT EXACTLY. BULL's EYE
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

In earlier versions of Windows (XP and before), you could drag a database to the taskbar, where it would appear as a taskbar icon to open that database.  This article shows how to recreate this functionality in Windows 7 through 10.
Did you know that more than 4 billion data records have been recorded as lost or stolen since 2013? It was a staggering number brought to our attention during last week’s ManageEngine webinar, where attendees received a comprehensive look at the ma…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …
Have you created a query with information for a calendar? ... and then, abra-cadabra, the calendar is done?! I am going to show you how to make that happen. Visualize your data!  ... really see it To use the code to create a calendar from a q…

715 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