Function Call From Qry - What If Null???
Dec 1, 2005
Hi all!
I have a query that returns some fields with "#Error" ...
The reason is that I call a function in the query, and the function chokes if there are no matches in my query criteria and therefore no argument is sent to the function.
I tried putting this in the function:
var = Iif(IsNull(var) = True, 0, var)
-but I still get "#Error" when there are no matching records.
I presume this is because not even Null is given to the function as an arg.
Should I make the arg optional or how can I solve this??
Thanks :)
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Sep 4, 2013
I'm having to recode some old MS Access DBs so they will run in the following environments:
Office 2000 on WinXP
Office 2003 on WinXP
Office 2010 on WinXP
Office 2000 on Win7
Office 2003 on Win7
Office 2010 on Win7
When I wrote my code for Office 2000 on WinXP things were simple because directory paths were the same across all computers and I could hard code pathing when using a shell command to launch other files.
My new approach is to make a function call to the Windows registry to determine the default executable and path for opening a file based upon its extension (see apicFindExecutable in basWindows API module).
I'm able to use code to create a shell call and debug print it to the immediate window. If I put my cursor in the immediate window at the end of the shell call and hit [enter] the external file will open as desired. If I try to open the external file directly through code, I get a file not found error.
To recreate the error take the following steps:
(1) browse to files that are accessible from your computer
(2) click the PREPARE DATA AND OPEN MAIL MERGE DOCUMENTS command button
Shell function call is made by the fnOpenFile function located in the basOpenFile module. There has to be a trick here that I'm missing.
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Nov 16, 2014
I do not understand what is happening here. I have foll0wing line in a calculated query field:
m: Switch([EmpID]<5,1) ' run Query 18 in attached example, A2007/2010
this produces 1 for all EmpID<5 and Null for all other EmpID's. All as expected.
But if I do this:
m: Switch([EmpID]<5,1,[EmpID]>=5,Null) ' run Query 19 in attached example
then the entire column is set to Null
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May 3, 2007
I did some searching and found this function posted by someone in response to the exact same problem I'm now encountering.
But how do I call this in my query?
Function StripZeros(pstr As String) As String
Dim n As Integer
n = 1
Do While Mid(pstr, n, 1) = "0"
n = n + 1
Loop
n = IIf(n > 1, n, 1)
StripZeros = Mid(pstr, n)
End Function
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Oct 29, 2004
I have linked an excel workbook as different tables in Access.
The workbook contains a Microsoft Query. I have now found out how I can open and edit the workbook from access, how can I Update/refresh the MSQuery before I close it?
Here is what I have:
Private Sub cmdTest1_Click()
Dim MyXL As Object
Set MyXL = CreateObject("Excel.Application")
Set MyXLSheet = GetObject("c: est.xls")
MyXL.Application.Visible = True
MyXLSheet.Parent.Windows(1).Visible = True
MyXL.Application.Cells(1, 1).Value = Now()
MyXLSheet.Close SaveChanges:=True
MyXL.Application.Quit
Set MyXL = Nothing
End Sub
eroness
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Feb 23, 2007
http://www.access-programmers.co.uk/forums/showthread.php?t=123538
Following on from that thread, I would really like to tidy up other areas of my front end. I am using the idea that Roy suggested and it works very well.
At the moment, I have a form, that has buttons on it that people click when they want to generate specific sheets from excel using data from access using VBA on the form. These work fine, however, now that the database is going live and all features need to be added, I think it would be nice to have one small form, with a list box.
I have converted a copy of the code on the form and placed in a module by declaring then functions instead of private subs.
At this stage, I tried doing it with macros running the code by using a series of runcode. I then created a table that has the macro name stored in it along with a decriptive bit of text detailing the excel chart that gets produced to make it easy for the user.
The list box populates itself correctly, but the problem I am having is I do not know how to make the 'go' button look at the list box, pull the hidden macro/function name from the list, then go and run the macro/function.
I have tried looking about, but have not found anyhthing.
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Aug 10, 2007
Dear Access Query Expert
I have created a query which has a function call as the criteria for one of the numerical fields. The function returns a string expression such as .....
1) 132 OR 142 OR 156
2) 132 OR 142
3) 132
..... into the criteria section of the numerical field.
Unfortunately, the query doesn't work if the criteria is generated by the function call. However, if I hardcode the criteria (don't send a function call but directly write 132 OR 142 OR 156) the query works.
I am puzzled and I am not sure how to solve this problem.
Thank you so much.
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Aug 8, 2006
Is it possible to call a function from a field on a form, ie, in the
control source put = FunctionName(abc)? Then I want to concantenate
it to another variable so it would look like:
=FunctionName(abc) & TextVariable
I tried this and got the ?Name on the form, like it couldn't find the field
name, which is really a function I'm calling.
Is this possible and if so, what am I doing wrong?
Thanks in advance for any help.
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Apr 5, 2014
I have the following in Form and it works OK
Call RunForm("frmProviderLookup", "", "Edit", "", "", "Normal", "Normal")
I want to build a combo box with several different RunForm variations as follows:
RunForm("frmProviderLookup", "", "Edit", "", "", "Normal", "Normal")
RunForm("frmCustomerLookup", "", "Edit", "", "", "Normal", "Normal")
RunForm("frmVendorLookup", "", "Edit", "", "", "Normal", "Normal")
etc, there are many of these
When I select one the variations from the combo box the RunForm statement is stored in strAction varaible..How do I code the Call strAction line? (I want only one call statement).In other words how to call a Function from a variable...The start of my module Function works OK and looks like this:
Public Function RunForm(FormName As String, _
Optional WhereCondition As String = "", _
Optional xMode As String = "", _
Optional filterName As String = "", _
Optional Args As String = "", _
Optional WindowMode As String = "", _
Optional View As String = "")
' Parameters (all optional except parameter 1)
' 1 - Form Name
' 2 - Where condition
' 3 - Mode [Add, Edit, View(Read Only), ""(PropertySettings), DS(Datasheet Edit)]
' 4 - Filter Name
' 5 - Opening Arguments
' 6 - Window Mode
' 7 - Form View
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Jan 16, 2007
With the script in the form that is part of MS-Access. I wonder how do I access/call the written function that are in the DLL file I made. I appreciate your help on this one...
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Jul 18, 2014
is it possible to call a function in a query with the input of a control element?
I have a form, and there is a list box in which I can choose the calculate method. In the query, a field should calculated with the choosen function.
Example:
Code : SELECT tblTest.price, tblTest.Date, forms![formtest] As Calc
...
The function has the same name as I can choose in the listbox. But, if I run the query a error appears.
Code : "Function forms![formtest]![lstChosenFunction] could not be found"
how I can call a function in SQL with the input of an listbox.
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Nov 3, 2014
I need a search function that will not just open files based on their names but also drill into the documents and search based on what's in it. The only way I can see now is to use the Window's search function (the one at the start button). Is it possible to call that function into access?how do I re-create the search style of the windows search bar for a specific folder? Something like streamreader
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Oct 16, 2014
I know its not possible. But Just wanted to confirm. Not at all possible?
Code:
Function PreImport(BookToImport As Workbook)
For Each cell In BookToImport.Sheets(1).Rows(1).Cells
cell.Value = Trim(cell.Value)
Next cell
BookToImport.Sheets(1).UsedRange.Rows(1).Replace ".", "_"
End Function
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Aug 13, 2013
I'm looking to use the shell function to dynamically call different pdfs that are in a directory. However I'm getting run time error 5 "Invalid procedure or call argument".
Here is the code (very basic I know)..
Private Sub Liste_Documentation_DblClick(Cancel As Integer)
Dim PathName As String
PathName = Me.Liste_Documentation.Column(2)
' Debug.Print PathName
Shell PathName
End Sub
A typical filepath name is as follows..
S:VenteVendeursMarcCRMDOCSDiligences KYC - LABFT - V 2013 04 23.pdf
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Apr 24, 2013
I am trying to using an iif statement to pick up null values, but I don't know what to type in the function. I tried using "is null", but got an invalid message.
What value I should type in to get null value in the function below?
IIf([popi_r2a] is null","",[popi_r2a])
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Apr 10, 2015
I have a form with couple of textboxes bound to a table. When the user opens the form to enter records, i want to write a function that would go through the textboxes to check whether the textboxes are left NULL. Now i can write code on button click for each form, but i was wondering if its possible to write a function that could be called for each form that i have to check for null values.
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Oct 7, 2013
I have a calculated field (Bhours) with the following IIf function:
=IIf(Fields!BDate.Value<=Parameters!Pdate.Value and Fields!EDate.Value>Parameters!Pdate.Value,Fields!H ours.Value,0)
It works perfectly, but I don't like the fact that it has a zero for the false part as I like the field to the blanc instead of filled with a zero.I can't use a space as I need to calculate with this field later on. I tried using "", but then the field displays #error".
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Jan 8, 2007
Hi friends,
I am new to this forum, and I am facing a problem while learning MS-Access.
I am preparing a database that stores the marks obtained by students in a particular paper in addition to their particulars in tables.
A query is then generated to canculate the aggregate marks and result (Pass/Fail) for the student. It is then presented in a report fomatted as a marksheet, as well as one tabulation chart.
The database is very crude in format, but I am happy with it since I do not know programming at all, and still I could make it.
I have used in built menu of "ms-access" and mouse clicks only for generating query. It was a learn by doing method.
The problem is that my marksheets require absent students to be marked as "ABSENT" or something of that kind. If I convert my Null values to :
Expr2: IIf(IsNull([E_1]),"ABSENT",[E_1])
It shows ABSENT for null value, but refuses to make column total for E_1; On the other hand if I do not enter such expression, it makes column total in tabulation report, but fails to mark "ABSENT" to those who did not appear. So I have to lose one thing to gain another, while I need both.
Can anybody help me at this?
pc
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Nov 18, 2013
I am struggling trying to execute a function inside a Form_current event to display some stats.
The Function is this:
Code:
Function FlightsByAircraft(Aircraft As Long) As Long
Dim rst As DAO.Recordset
Dim dbs As DAO.Database
Dim str As String
str = "SELECT * FROM tblFlights WHERE AircraftID = " & Aircraft
[Code] ....
The code for the Form_Current event is this:
Private Sub Form_Current()
txtStats1 = FlightsByAircraft(Me.AircraftID)
Very simple. Well, the problem is when I move to a new record, a error message comes up: "Run-time error '94' - Invalid use of Null". It is because the AircraftID is not populated at that time. I tried to insert in the function code something like that:
Code:
If IsNull(Aircraft) then
exit function
else
.... (the DAO.Recordset code)
but it doesn't work.
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Jul 5, 2013
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
intCounter = 0
Dim rs As ADODB.Recordset
[Code] ....
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Apr 18, 2006
Hello all,
A bit of a weird one, I've got a query and the criteria for showing records is that one particular field is null. However the query is showing records with the values in the field chosen for the Is Null.
Not sure why this is happening, has anyone come across this problem before?
Thanks.
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Apr 3, 2008
I am having problems with setting up a set of combo boxes.
What I am trying to do is if combo Productline is empty then in combo PartNumber would show all products but if combo Productline has a value selected then in the combo partnumber would only be able to select the partnumbers in that productline.
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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.
the problem occurs when there is blank textbox its says invalid use of null.
e.g
myStringVariable = Forms!myform!EmpName
myDateVariable = Forms!myform!EmpDOB
this code is behind the update button which i press when ever i want to shift data to History table
so when the fields are empty the invalid use of null error arrise
any idea how to handle this null specially in date
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Dec 11, 2013
So basically I need making a function that will count the number of records from another table/query based on a field from the current query.
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Nov 16, 2007
I think the title pretty much sums it up....
I have a query where data is first sorted by user input; first field's criteria: [fieldname], then by another field's criteria: Is Null.
I know there are records containing null values in the second field, as I have run a select query with the criteria: Like "*", to make sure they are null, and not zero-length-strings.
The query is refusing to return any results...
Any ideas?
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Jul 6, 2006
Hi,
1. We have one master table with many records.
2. We'd like to filter out records from the "master" table that match the records on other "exception" tables.
3. As I add records to the "exception" table, I'd like to generate a new table with the records from the master minus the exception table.
I've been reading up and I think that this could be done with queries.
Any suggestions?
Thanks,
Adrian
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