DLookup Returns Null!!
Nov 26, 2007
Hi,
I wrote the code below in a module. The text box that this part of the code is getting its value from has a DLookup in its control source. The problem is that when the DLookup does not match the criteria it looks for, it returns Null. The code tries to assign Null to a variable of type currency and that returns an error. Is there anyway to convert the Null to 0?
What do you suggest?
Returns DLookup value:
Forms![frmHouse]![qryHouse4].Form![txtTotalVO].Text
All the function:
Public Function CalculateDepositPlusVO()
Dim vAgreedPrice As Currency
Dim vtxtTotalVO As Currency
Dim vtxtAgreedPricePlusVO As Currency
Forms![frmHouse]![qryHouse4].Form![AgreedPrice].SetFocus
vAgreedPrice = Forms![frmHouse]![qryHouse4].Form![AgreedPrice].Text
Forms![frmHouse]![qryHouse4].Form![txtTotalVO].SetFocus
vtxtTotalVO = Forms![frmHouse]![qryHouse4].Form![txtTotalVO].Text
vtxtAgreedPricePlusVO = vAgreedPrice + vtxtTotalVO
Forms![frmHouse]![qryHouse4].Form![txtAgreedPricePlusVO].SetFocus
Forms![frmHouse]![qryHouse4].Form![txtAgreedPricePlusVO].Text = vtxtAgreedPricePlusVO
End Function
Any help will be very much appreciated,
B
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Mar 5, 2012
I have a query that runs just fine and takes about 1 minute to run on average. I have vba code that uses Dlookup to determine if the query returns any records. The problem is that each time it runs it has to crunch all the data, all I care about is if there is any result at all. Is there a way to get the query to stop after it finds one record to speed things up greatly?
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Apr 23, 2015
I have 3 text boxes on a form each of which gets their values from different queries using DLookup this is functional but only when I click on the text box its self, I have tried using the "On load" & "On current" to requery the textbox (Text38 as control name) but no luck,, another strange thing i've noticed, when I have the form open in access and i click on my taskbar, thus switching windows from access to the desktop but keeping access in view, all text boxes are calculated immediately.
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Nov 30, 2006
Hi,
I have a webpage which shows some results upon executing some SQL statements. However, i will met with some problems when the SQL statements return a NULL value therefore i would like to do some error checking such that when the SQL statement returns NULL, i will direct the user to another page.
Is it possible for me to try sth such as:
if strSQL = SELECT .. FROM .. WHERE .. = NULL then
response redirect ...
Was wondering if anybody would be able to give me some advise.
Thank you.
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Sep 12, 2013
I have a count column in this query, and i would like for it to return a zero instead of null if it doesnt find anything to count. Here's the SQL for the query.
Code:
SELECT Documents.Status, Count(Documents.Document) AS CountOfDocument
FROM [Request Details] INNER JOIN Documents ON [Request Details].Request_ID = Documents.Request_ID
GROUP BY Documents.Status, [Request Details].Contract, [Request Details].CDRL, [Request Details].Change_Cycle
HAVING (((Documents.Status)="No Record") AND (([Request Details].Contract)=[Forms]![Report Runner]![Contract]) AND (([Request Details].CDRL)=[Forms]![Report Runner]![CDRL]) AND (([Request Details].Change_Cycle)=[Forms]![Report Runner]![ChangeCycle]));
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Jul 18, 2015
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Oct 26, 2005
I have a form that updates a table called BC - Issue Data Table. I am pulling in a carrier number from another table "BC - Carrier Data Table" using the DLookup function "on current" event in my form. The problem arises if the Dlookup doesn't find a matching record, it just adds the next record in my issue table. My issue table has an issue number that is an autonumber field. Each time this Dlookup doesn't find a match it adds a new issue that is blank. I want to run a Macro if the Dlookup is null instead of it erroneously creating a record. I have a field called issue_Index on the form which is carried over from another form previously filled out by the user. That is the criteria that is linked in both tables. Any ideas how to code if the below returns a null value to run a macro. Also should this be in "on current" or another form event location?
Me.CarrierNum = DLookup("[* Carrier Number] ", "BC - Carrier Data Table", "[* Carrier Index] = [Issue_Index]")
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Aug 15, 2015
I am trying to run this code but getting a run time error 94 - null value - when it shouldn't be.I am thinking I have written the Dlookup incorrectly?
Code:
Private Sub txtProductName_Click()
Dim iProdType As Integer
Dim ProductID As Integer
iProdType = DLookup("ProductTypeID", "tblProduct", "ProductID" = Forms![frmBooking]![cboProductID].[Value])
Note ProductID in an integer
How can I diagnose this or what could the solution be?
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Aug 11, 2014
The basic idea is that I need to insert a record into a table and then return the Key field so that I can use it to populate another table. This was working just fine for a while, then it stopped and naturally I can't think of anything I did to make it not work. I get an Invalid Use of Null error at the bolded step.
Dim SQL As String
Dim SpecID As Long
Dim VerifySpec As Variant
' Check for empty strings
If Len(Me.txtNewPartNumber & vbNullString) = 0 Then
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End If
[code]....
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Sep 14, 2005
When counting in Access and a null value is returned I would like this value to be "0" rather than null. I have experimented with IIF and Nz but have been unable to find the key.
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I've include a simple code.. Thanks..
SELECT Count(Table1.[Column One]) AS [CountOfColumn One]
FROM Table1;
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Apr 6, 2015
I have a search from that has an option group, text fields, and a checkbox where the users selects a variety of option that generates a query. If the query return at least on record a split form (form on top/datasheet on bottom) is displayed and the form has an Edit and Close button. If the query returns no records the form is still displayed except the buttons are not visible.
If I knew the result of the query and then made a decision whether to open the form or release control back to the search box that would be great. To open the form I am using VBA with the DoCmd.OpenForm(,,"MyQuery","criteria") command.I thought about using the DLookup command and evaluate the return value for null to be used to control the program flow.
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Error: runtime error '3075' syntax error (missing operator) in query expression 'Room Number ='.
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here is the dlookup;
If DLookup("RoomNumber", "tblRooms", "RoomNumber = " & Forms!RoomPackages!txtRoomNumber) > 0 Then
MsgBox "This number already exists."
Else
p.s it unbound form
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I do not understand what is happening here. I have foll0wing line in a calculated query field:
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m: Switch([EmpID]<5,1,[EmpID]>=5,Null) ' run Query 19 in attached example
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It might be an easy one but I just wasted the past hour deciphering through my code in order to solve the run-time error '94' that I'm getting when trying to execute the following code:
Code:
Private Sub cmdUpdateDates_Click()
'###################################
'This sub aims at combining the timesheet date and the start and end time into the fields [Start Time] and [End Time].
'###################################
Dim intCounter As Integer
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Dim rs As ADODB.Recordset
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Hello all,
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Thanks.
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I am having problems with setting up a set of combo boxes.
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Nov 16, 2006
Hi, I have some problem with assigmnet with date and string variable. what i wana do is get data from Forms textboxes into variable and then by insert query send to history table.
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e.g
myStringVariable = Forms!myform!EmpName
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Dec 14, 2007
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Apr 13, 2005
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May 17, 2007
Hi, I am new to access and have just started to build our first database. We are an engineering company who sells automotive components. I have set up the database to process customer orders. Some of the products we sell are remanufactured and sold on an exchange basis. So, once a unit has been sold at some point in the future the customers original unit comes back to us to be remanufactured - but this is not the case with all products we sell.
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The problem I have with this is that the exchange unit is normally returned weeks after the original order was sent, and that not every product requires an exchange. Is there a simple way of dealing with this?
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Thanks
Rebecca
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Sep 19, 2006
Hi
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Is there a way I can use this or another function to pull out numeric values, but return missing/null where appropriate.
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Feb 25, 2008
The following query never returns, even though there is an index on the name field in the Patient table:
SELECT p.Name FROM sheet4 AS s INNER JOIN Patient AS p ON p.NAME LIKE s.LASTNAME + ', ' + s.FIRSTNAME + ' %'
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Aug 30, 2005
Obvious neophyte issue here, sorry...
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Nov 26, 2006
I am creating a database for a hyperthetical car hire company. A customer hires a car from and until a certain date. If a new customer decides to hire a car i want to generate a list of cars that he can choose on depending on the other dates from which other cars are hire from and until. I have created a query that generates all of the cars that the new customer can not use.
I have also generated a list of all of the cars, in the database.
I have created a new query takes the numberplates of all the cars and subtracts the numberplates of the cars that are being used.
This is where i hit a problem. For some reason the query is generating the list of number plates twice and then subtracting the numberplates that are being used. This leaves me with with 2 values for every numberplate that can be used and 1value for every numberplate that cannot be used. Can you help me?
Please post your email address so i can send you the zip file as the file is too large to upload. The query that i am having problems with has the title:SEARCH FOR AVAILIABLE CARS.
Thank You
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Feb 7, 2007
Hi all,
I think this could be another one of my stupid moments. Here is my query expression -
IIf([WHAT TEAM?]=1,[strCurrent_Team]="FINANCE",[strCurrent_Team]<>"FINANCE")
When run, the user is prompted to enter a team number. If they enter 1, then by my reckoning the query should return all records where [strCurrent_Team] = "Finance".
However, no records are returned.
strCurrent_Team is formatted as text.
Can anyone tell me what I am doing wrong here?
Cheers,
Rob
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Jul 29, 2007
I hope this doesn't sound too simple for this forum, I'm only a newbie!
I have a select query that will display the recordset that meets the criteria (OK I know that's not a big deal) but...I want to know if, when there are no records that meet the criteria, can I open a form (dialog box maybe) that will say there are no records found instead of showing a blank recordset. Once again I hope this is not so blindingly obvious that I have to start watching my coffee intake
Thanks in advance
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