Dlookup Null Error

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Dlookup Invalid Use Of Null

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Dlookup Error 2471

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Access Dlookup Syntax

like you, helping each other. Join them; it only takes a minute: Sign up MS ACCESS DLOOKUP How to deal with error on return data? up vote 0 down vote favorite I have a list of items, some http://www.utteraccess.com/forum/dlookup-record-null-t1963806.html of which have an order ident (nvarchar) related to them. I wish to display the items in the list and use DLookup to display the order numbers, if appropriate. This works, however if there is no order ident then it displays +Error My control source for the field is: =DLookUp("[PONumber]","[Q_SalesOrders_CustomerDetails]","[OrderID]=" & [OrderID]) What I suspect is happening is that, since there is no Order related to the item then the OrderID (integer) is null therefore http://stackoverflow.com/questions/33630364/ms-access-dlookup-how-to-deal-with-error-on-return-data it can't return anything for the POnumber (nvarchar) Can I get it to translate this as "n/a" in the PONumber field? Thanks ms-access null share|improve this question edited May 17 at 6:25 Sampada 1,92641026 asked Nov 10 '15 at 12:48 PaulStephen 11 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote If you want to use DLookup, you need IIf for the two cases: = IIf([OrderID] IS Null, "n/a", DLookUp("[PONumber]","[Q_SalesOrders_CustomerDetails]","[OrderID]=" & [OrderID]) But using DLookup in a continuous form isn't always the best idea. You could try using a LEFT JOIN as recordsource of your form, so that PONumber becomes available as source field. Something like this (if Q_Items is the original recordsource of your form): SELECT Q_Items.*, Nz(Q_SalesOrders_CustomerDetails.PONumber, "n/a") AS PO_Number FROM Q_Items LEFT JOIN Q_SalesOrders_CustomerDetails ON Q_Items.OrderID = Q_SalesOrders_CustomerDetails.OrderID share|improve this answer answered May 17 at 9:03 Andre 11.5k3935 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged ms-access null or ask your own question. asked 11 months ag

a problem where DLookup is returning a NULL value instead of the correct value for a field in http://www.pcreview.co.uk/threads/dlookup-returns-null-incorrectly.2250951/ a query, while an SQL statement retrieves the correct value. I https://bytes.com/topic/access/answers/682424-dlookup-dao-recordset-null-value-return-check wrote this quick SQL statement to demonstrate the problem: SELECT DateContractAwardDue, Nz(DLookUp("DateContractAwardDue","qryCSPDetails","TranNumber='065018'"),"null") AS DL1, Nz(DLookUp("Created","qryCSPDetails","TranNumber='065018'"),"null") AS DL2 FROM qryCSPDetails WHERE qryCSPDetails.TranNumber='065018'; And here's the result (transposed for ease-of-reading): DateContractAwardDue 12/12/2005 DL1 null DL2 11/10/2005 10:33:18 As you can see, the SQL SELECT statement correctly dlookup error returns the date in the field, while the first DLookup returns null. The second DLookup, though, correctly returns the date in a different field in the same query. Is there a problem with the DLookup function in 2003, or am I missing something rather obvious? Thanks! -matt , Nov 21, 2005 #1 Advertisements Allen dlookup null error Browne Guest There could be several things going on here. 1. What result do you get if you open the Immediate Window (Ctrl+G) and enter this line: ? DLookUp("DateContractAwardDue","qryCSPDetails","TranNumber='065018'") 2. If that returns Null unexpectedly, open the relevant table in design view and look at the Data Type for the TranNumber field. If it is Number (not Text), lose the extra quotes and leading zero, i.e. try: ? DLookUp("DateContractAwardDue","qryCSPDetails","TranNumber = 65018") I'm guessing that there is a problem with the data types here. DLookup() does wrongly return Null if the result is actually a zero-length-string, but I don't believe that's your issue here. (Note that your Nz() statement has the effect of turning what is presumably meant to be a date field into a string, because you are using the 4-character string as the alternate value.) -- Allen Browne - Microsoft MVP. Perth, Western Australia. Tips for Access users - http://allenbrowne.com/tips.html Reply to group, rather than allenbrowne at mvps dot org. <> wrote in

a Question Need help? Post your question and get tips & solutions from a community of 418,497 IT Pros & Developers. It's quick & easy. Dlookup and DAO recordset null value return check 100+ P: 553 questionit Dlookup() gives an error if the searchkey (the field i am looking for) is not found in the table. How to check before Dlookup() statement whether the table contains the required value. Similarly, with DAO RecordSet : Set rst = db.OpenRecordset("Select name FROM Table1 WHERE name='" & "AName" & "'") MsgBox rst.Fields("name") <--------------------- Get error here if "AName" not returned from the table. I have tried doing If IsNull(rst) = True then ..... but seems like rst connot be checked against Null . Help please Jul 24 '07 #1 Post Reply Share this Question 11 Replies Expert 100+ P: 1,206 JKing IsNull() can be applied to both. Expand|Select|Wrap|Line Numbers IfIsNull(Dlookup())Then Msgbox"DlookupisNull!" Else 'yourcode Endif IfIsNull(rst.Fields("name"))Then Msgbox"Recordsetfieldisnull!" Else 'yourcodehere Endif Jul 24 '07 #2 reply 100+ P: 553 questionit I've got solution for RecordSet : Expand|Select|Wrap|Line Numbers Ifrecst.RecordCount<1Then MsgBox"nothingreturned" Please advise how to do the similar thing with Dlookup() Dlookup() gives an error if the searchkey (the field i am looking for) is not found in the table. How to check before Dlookup() statement whether the table contains the required value. Similarly, with DAO RecordSet : Set rst = db.OpenRecordset("Select name FROM Table1 WHERE name='" & "AName" & "'") MsgBox rst.Fields("name") <--------------------- Get error here if "AName" not returned from the table. I have tried doing If IsNull(rst) = True then ..... but seems like rst connot be checked against Null . Help please Jul 24 '07 #3 reply Expert 100+ P: 1,206 JKing See my above post. Dlookup returns null if there are no matches. Jul 24 '07 #4 reply Expert 5K+ P: 8,405 ADezii Dlookup() gives an error if the searchkey (the field i am looking for) is