Modules & VBA :: Calling Public Function To Backup / Compact Back End?
Dec 23, 2013
I have the following function that I found online. Unfortunately I can't remember where I got it since I've had it for a little while. Today, when I tried to actually put it to use it didn't work.
I'm calling it from a form as follows: CompactDB (tblHotword)
tblHotword is just a random table from the back end. My understanding of the function was that it would use that table to connect and get the file name of the back end.
Whenever I run it, Access pops up a window that says "Object required" and nothing else. It doesn't look like a standard error message popup. When I click 'OK', Access continues with the rest of the code as if nothing went wrong. The function doesn't run though.
Code:
Public Function CompactDB(TableName As String) As Boolean
On Error GoTo Err_CompactDB
Dim stFileName
DoCmd.Hourglass True
stFileName = db.TableDefs(TableName).Connect
[code]....
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Oct 2, 2004
I haev a report with 15 sub reports. I have to use Visual Basic to format the sub reports. I know how to do the formatting (see below) but what I would like to do is have one function (Public) that I can pass the subReport name to and have the formatting happen. This would be mush easier to maintain than copying the code below into on_print events of all 15 sub reports.
Has anyone done this and have an example??
Thanks
--------------------------------------------------------------------------------------
Private Sub GroupHeader0_Print(Cancel As Integer, PrintCount As Integer)
Dim widthOfBox, startLeftSide
startLeftSide = 0.017
widthOfBox = 0.21
Me.ScaleMode = 1
Me.ForeColor = 0
'Repeat the following line of code for each vertical line
' 1*1440 represents 1 inch
' Me.Line (0 * 1440, 0)-(0 * 1440, 14400) 'Draws line at Left Margin
Me.Line ((startLeftSide * 1440) + widthOfBox * 0 * 1440, 0)-((startLeftSide * 1440) + widthOfBox * 0 * 1440, 14400) 'Draws line at Left Margin
Me.Line ((startLeftSide * 1440) + widthOfBox * 1 * 1440, 0)-((startLeftSide * 1440) + widthOfBox * 1 * 1440, 14400) ' Draws next line
Me.Line ((startLeftSide * 1440) + widthOfBox * 2 * 1440, 0)-((startLeftSide * 1440) + widthOfBox * 2 * 1440, 14400) ' Draws next line
Me.Line ((startLeftSide * 1440) + widthOfBox * 3 * 1440, 0)-((startLeftSide * 1440) + widthOfBox * 3 * 1440, 14400) ' Draws next line
Me.Line ((startLeftSide * 1440) + widthOfBox * 4 * 1440, 0)-((startLeftSide * 1440) + widthOfBox * 4 * 1440, 14400) ' Draws next line
'the 14400 is an arbitrary number to increase the line to the max of a
'section.
End Sub
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Sep 26, 2014
I've got a private sub that runs when the form loads. I want it to get the id of the record which has opened this new form.
The public sub populates the variable but it's Empty going back into my private sub. I'm sure its a simple school boy error but it has me stumped!
I want it public as I need to keep that id as new records are added in the form.
Private Sub Form_Load()
FRStudentFundingRequestID
'fundingrequest = FundinRequestID
Me.txtFKFReq = FundingRequest
End Sub
__________________________________
Public Sub FRStudentFundingRequestID()
FundingRequest = [Forms]![frmFundingRequest]![txtpk]
End Sub
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Oct 4, 2013
I am trying to read the value of a control on an open form from a Public Function in a Module with no luck. I suspect the issue is syntax.
Code:
Public Function MyFunction(varFormName As String, varControlName As String)
If Forms(varFormName).Controls(varControlName) = True Then ' = 0 even when control is -1
Else
End If
End Function
The variables pass through fine but the If statement equals zero regardless of the state of the form's control. I tried several variations to no avail.
If Forms(varFormName).Form.Controls(varContactControl ) = True Then
If Forms(varFormName)!Form.Controls(varContactControl ) = True Then
Etc.
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Jun 4, 2014
I have an issue with this case select below. The DelayStart is time so lets say I put in the debug window
?DatePart("h", #04:00pm#)
The result would be 16 which is correct BUT the issue is my second shift starts at 04:01pm and the result is still 16 untill 5pm. How do I fix this so I get the correct shifts? Im guesing use something other than DatePart but what?
'Daylight 6:00am - 4:00pm
'Afternoon 4:00pm - 2:00am
'Midnight 2:00am - 6:00am
Code:
Public Function getShiftForRecord(DelayStart As Variant)
On Error Resume Next
Select Case DatePart("h", DelayStart)
Case 6 To 16 'Daylight 6:00am - 4:00pm
[Code] ....
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Jan 23, 2014
I have built an access application that contains a set of buttons along the top of every form that serve as navigation.* These buttons each perform the same function on every form they are on. (menu opens the main menu, etc) I have database macros to assign each button the same function but I still have to go through each form and manually assign them. I was wondering if it was possible to define a public function that on db open will look for all buttons with a certain name and assign them the macro. (so all buttons called cmdmainmenu will have the OpenMainMenu macro assigned and so on).Before you go there, I have already tried the navigation form and set all forms as subforms.
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Sep 23, 2014
Question for Documentation purpose: Should the Public Type be declared in its own module?
Or should it be declared in a standard module where non-public functions use it? It is not for a Form module use.
For a Rule Engine, a function is calling one record on 4 different SQL Views (as linked tables) that have the same field format.
For speed, the recordset should only be opened once. However, there are multiple values that must be returned to the result table multiple fields.
One way to return multiple values is an Array. That has over head too.
Another way is to create multiple public variables. Not my choice for documentation. Another is to create a string.
This is a pure code module with several non public functions / subs. What is the documentation preference? List a Public Type close to the function, or place it in the Global module?
Background: A function can only have one return value.
By creating a public Type, multiple values can be returned.
Code:
Public Type Income
Wages As Currency
Dividends As Currency
Other As Currency
Total As Currency
End Type
Use this structure as the return type for a function. In a real situation, the function would look up your database tables to get the values, but the return values would be assigned like this:
Code:
Function GetIncome() As Income
GetIncome.Wages = 950
GetIncome.Dividends = 570
GetIncome.Other = 52
GetIncome.Total = GetIncome.Wages + GetIncome.Dividends + GetIncome.Other
End Function
To use the function, you could type into the Immediate Window:
GetIncome().Wages
(Note: the use of "Public" in the Type declaration gives it sufficient scope.)
Important Notice The way this function is called will work, but is wrong from the aspect it re-calls the recordset over and over.
See the proper way to use it submitted below.
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Oct 22, 2013
I am designing a Public Function F()
I want this function to populate value from a any field selected from any table to any text box in any form ...... Lets say in a Database named TestDB we have a Table named tblTest , a Form named frmTest and in this form( frmTest ) we have one Bound Combo Box named cmbTest and one unbound TextBox named txtTest
We assume that the table tblTest has three fields : TestID , FName and LName .
We also assume that there are already some records in the Table tblTest .
If the function F() is already programmed it should take as arguments as it follows :
F(FormName as??? ,ControlName as ???, TableName as ???, FieldName as ???, ID_Field_Name_of_the_Table as ???, Combo_box_selected_ID as ???)
In result the function should (probably) DLookup (FieldName , TableName , ID_Field_Name_of_the_Table = Combo_box_selected_ID ) and then store the value in a variable ( probably Variant ???) , lets say called varSetValue.
The problem is IF this is the correct way to handle that issue , than what should i do next.... I really don't know how to pass a Control's name to a function from the Event module of the ComboBox -
I mean - how can I obtain the value so it is usable for the function .... What data type should be the function arguments so I can use them to set a value for a control in any form .
In example : If the Dlookup() is somehow successfull then I want to assign the varSetValue to the txtTest what should I do : FormName.ControlName.Value = varSetValue >??????
I have read a lot materials but couldn't find a good answer for that , and aswell what data type should be the arguments that the function accepts and how do I obtain Controls and Forms names so I could use them in the function as described above .
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Aug 10, 2013
I have 28 combo boxes on a form, which I want to insert data into the table as they are changed. Each one will pass the same sets of data just with different parameters which come from the form.
Rather than putting the same code to insert on each of the 28 combo boxes I thought it would be easier to create a function to do it and pass the parameters to it through a sub on the AfterUPdate event of the combo box.
I need to pass 4 parameters, if I only put 1 in there it works fine, but when I start putting more in it doesnt work and I get compile errors or syntax errors.
Sub routine:
Code:
Private Sub cboMonday1_AfterUpdate()
If Me.cboMonday1 = 1 Then
Me.cboMonday1.BackColor = vbGreen
Me.cboMonday1.ForeColor = vbBlack
[Code] .....
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Jun 11, 2013
I have multiple reports that use similar IIF statements as the controlsource for four textboxes. Naturally, I don't want to have to update twelve controlsources if any of the calculations change, so I thought I'd make this a public function. However, I don't know how to pass along multiple textboxes as variables. Here's what I have so far:
Code:
Option Compare Database
Public Function txtColor(ByRef textbox As Control)
Dim str1, str2, str3, str4 As String
'The IIf statement is simplified for this example. It's not important.
str1 = "=IIf(IsNull([Inquiry start date]),'W',IIf([txtInquiry]<1 And IsNull([Inquiry end date]),'R'))"
[Code] ....
And this is in the report (where ??? is what I'm asking about)
Code:
Private Sub Report_Load()
Call txtColor(???)
End Sub
The error I get is "Runtime 424 Object Required"
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Feb 26, 2014
I am using a public function to feed a variable string to a query. So far I have got:
Code:
Public Function ClientStreetModule(firstLVar As Variant, streetVar As Variant, newFL As Variant) As String
Dim cslStr1 As String, newStreet As String
newStreet = Right(streetVar, Len(streetVar) - Len(newFL))
[code]....
However, I only need to use newStreet as the true part of iif, in which instance all are longer. At least I think this is the problem. I realise I might need to use NZ but am not sure how. Why it is evaluating and giving errors for all records and not just when the iif criteria is true as I want it to?
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May 29, 2015
I have never tried passing variables while calling a function so I don't know what the heck I'm doing. I'll give a simplified example of what I'm trying to do. The second variable vRank is reporting properly but the first one vID gets "stuck" on whatever the first item in the listbox is.
Code:
Dim vrt As Variant
Dim upSQL As String
For vrt = 0 To Me.List1.ListCount - 1
If Me.List1.Selected(vrt) = True Then
Call ChangeUp(Me.List1.Column(0, vrt), Me.List1.Column(1, vrt))
[Code] ....
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May 31, 2014
I have a table with only two fields and one record: BegDate and EndDate (beginning and end date of the reporting period respectively). I also made a function with variables that look up those values for use as a date parameter in a query.
Here is the code:
Option Compare Database
Option Explicit
Public Function getCurrentRepDates() As Date
Dim dtBegDate As Date
dtBegDate = DLookup("BegDate", "tblCurrentRepDates")
[Code] ....
I am getting a syntax error for the line marked red. How can I use "Between" function in VBA code? Access 2010
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May 29, 2006
I have a front end MDE and a backend MDB. From the front end using Visual Basic I want to be able to backup, compact and repair my database. If anyone can point me in the right direction it would be appreciated.
Thanks!
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Dec 22, 2005
When should you backup the data base and when should you use compact and repair the data base. We have been doing a compact and repair at the end of each day's shift, but one of my employes wants to only backup after the day's shift. What is the best way to backup the data base?
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Aug 17, 2005
We are currently running a FE / BE splitted database abd would like to back the back end up (to a sepearate location) every 15 minuutes by using the On Timer event.
Troiuble is, I believe I cant use the CopyDataBaseFile method whilst other users are in it and it would be too much hassle kicking everyone off!
Manually copying and pasting is good, but would really like to crack this one
Any suggestions please?
Regards
Andy
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Apr 30, 2014
I have some code in a form that calls for a public function and passes on some values. the function makes some calculations and assigns a value to the variable "percent" in the function itself.
How can I get the value of this variable back in the form so I can use it?
Form:
Code:
Private Sub Form_Open(Cancel As Integer)
Dim Table As String, TotalFields As Single
Table = "tblAdmission"
[Code]....
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Jan 24, 2014
I am trying to use VBA to backup the BACK-END of a split database (so I can automatically archive selected data). If I use FileCopy I get a message that the BACK-END database has not been found.Obviously I could 'unlink' the BACK-END, copy it and 're-link' it..Is it possible to copy the BACK-END tables(not just the links) into the FRONT-END and get at them that way?
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Jan 23, 2008
I'm using Access 2007, with what I think is a normal database that I've built up over the past month (maybe 15 tables, <1000 records, 20 queries, 4 or 5 reports and macros). I'm not an experienced Access programmer, so I don't think I'm doing anything fancy with security settings or any other such stuff. (If I have, it's surely by accident, not by intent.)
When I try to back up the db using the simple office button -> manage -> backup method, access generates a date-stamped backup filename and opens a file save dialog for me, but it ALWAYS fails to backup the database. I always get the same error message when I click save, whether I save on my machine, or on a network drive.
"Could not use '<path to the current database dir><backname>.accdb; file already in use."
This same error occurs when I create a new blank database with a single Table1 in it, so I don't think it's my database.
Does anyone have any idea why this might be happening? I scoured the net for help, but nothing. I checked various Access forums, but nothing. So I arrive here after I've done my homework... thanks
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Apr 3, 2015
I currently manually run a compact and repair on the backend of a database at work, but was wondering if it might be sensible to set it to compact on close so that (in theory) it is done at least daily and therefore shouldn't take much time?
The back end resides on a network server, which is backed up continuously, so in theory it should be easy enough to roll back to a backup copy should anything untoward happen.
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Apr 5, 2008
I'm new to VB and am learing slowly with all your great help in this forum.
I'm wondering if its possible to write a Public Function for vbCRLF. I have a field in multiple forms that are all named 'Note'. If I have the following code:
Public Function PubNoteLF()
On Error GoTo PubNoteLF_Err
My!Note = My!Note & vbCrLf
PubNoteLF_Exit
Exit Function
PubNoteLF_Err
MsgBox Error$
Resume PubNoteLF_Exit
End Function
When I run the code I get Compile Error: 'Sub or function not defined.'
Can someone tell me what I'm doing wrong? Its problably something real basic, but I'm stumped. Thanks.
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Feb 13, 2015
I have a query that I'm working on through Access 2010's design view. I'd like to add a criteria to the query where it only shows results with the employee name column matching a global variable I created that stores the name of the currently logged in employee.
Here's my vba code that declares the global variable and the public function i'm trying to pass as criteria in the query:
Global gbl_loginName As String
Public Function returnName() As String
If IsNull(gbl_loginName) Then
returnName = "test" ' dummy account created for development only
Else
returnName = gbl_loginName
End If
End Function
and here's the SQL code from Access's design view:
SELECT [Entry of Hours].WC, [Entry of Hours].[Employee Name],
[Entry of Hours].[Set Up Time], [Entry of Hours].[Run time],
[Entry of Hours].[Traveler Number], [Entry of Hours].[Entry Date],
[Entry of Hours].[Quantity Finished], [Entry of Hours].Notes, [Entry of Hours].WPS,
[Code] ....
when I try running the query, however, I get this error:
'returnName' is not a recognized built-in function name
Is there a problem with using public functions in Access' design view?
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Jan 14, 2008
Hi all,
I'm trying to get a public function to work within the design view of a query. The function is defined as:
Public Function Percentile_(fldName As String, _
tblName As String, p As Double, _
Optional strWHERE As String = "") _
As Double... ( I can put the whole code if u need it)
Any thoughts about how I can make the Percentile function calculate values according to a GroupBy statement and not for whole data set?
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Jun 7, 2012
I have created a module with a function that capitalizes the third letter in words that begin with "Mc". I have a table with the city field all uppercase letters. I created an update query that takes the field and correctly changes it. How you would go about tying this function to the textbox on the input form. So, if a user incorrectly enters "mccoy" in the City Field the function would be called and would automatically change it to "McCoy".
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Oct 29, 2007
Hi All
I have used Allen Browne's code (see http://allenbrowne.com/ser-16.html, bottom of page) as a model for my user-defined type and public function in an events management database.
Using the function in forms/VBA works fine.
But my DB crashes whenever I try to use it in a query.
My modules code:
= = =
Option Compare Database
Public Type EvCheks
EvType As String
EvAttCat As String
EvUnitAss As String
EvCheksAll As String
End Type
= =
Public Function getEvCheks(EV, EvUnit) as EvCheks
'Event Type: Event or DL
If (DLookup("evtype", "tblevents", "[evid] = " & EV)) = "Event" Then
getEvCheks.EvType = "Y"
Else: getEvCheks.EvType = "N"
End If
'Event Attendance Category: INDB= in database or LIST
If (DLookup("evattcat", "tblevents", "[evid] = " & EV)) = "INDB" Then
getEvCheks.EvAttCat = "Y"
Else: getEvCheks.EvAttCat = "N"
End If
'Event Assessing Organisation
Dim AOROName As String
Dim AOName As String
AOROName = DLookup("evunitassessable", "tblevunits", "[evunitid] = " & EvUnit)
AOName = Mid([AOROName], 1, InStr([AOROName], "/") - 1)
Select Case AOName
Case "NA"
getEvCheks.EvUnitAss = "N"
Case "ABCD"
getEvCheks.EvUnitAss = "Y"
Case Else
getEvCheks.EvUnitAss = "X"
End Select
getEvCheks.EvCheksAll = getEvCheks.EvType & getEvCheks.EvAttCat & getEvCheks.EvUnitAss
End Function
====
On a form, I have a button with on-click event code that defines the EV and EVU variables and displays a message box
MsgBox getEvCheks(EV, EVU).EvCheksAll
This works fine.
=====
In a query I have this SQL code:
SELECT tblEvUnits.EvId, tblEvUnits.EvUnitID, getevcheks([evid],[evunitid]) AS EventDetails
FROM tblEvUnits;
This causes the db to crash.
I cannot get the "back-end" definition of the function into the query, as Access rejects it because of the dot, i.e. ".EvCheksAll".
I suspect there is some formatting quirk for using a public function that includes a user-defined type, in a query.
Any/all assistance much appreciated.
Regards
AlanM
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Sep 17, 2013
I created a Public Function called fNetWorkDays in my access database, however, when I try to use it in an expression I get "Undefined function 'fNetWorkDays' in expression". The Public Function is in a standard Module in my vba project. Why I cannot call it in my queries?
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