I am trying to run the below global function. I am basically passing it the name of the form and cycling through the controls to get the before and after values. This has been working fine up until I wanted to capture the values from a sub form. I recently added the Optional tempParentFormName As String parameter. Now I am trying to get the syntax right for the controls of the sub form. Forms(tempParentFormName).Form(funFormName).Controls is not working. What should it be? The version for a from without a sub (Forms(funFormName).Controls) works fine.
Public Function funDeleteGetFieldValues(funFormName As String,
tempFieldsValues1 As String,
tempFieldsValues2 As String,
Optional tempParentFormName As String)
Dim ctl As Control, tempProperControl As Boolean, tempCounter As Integer
tempCounter = 1
tempFieldsValues1 = ""
tempFieldsValues2 = ""
For Each ctl In Forms(tempParentFormName).Form(funFormName).Controls
'A bunch of code
Next ctl
Set ctl = Nothing
End Function
It is the subform control to use:
Forms(tempParentFormName)(subformControlName).Form.Controls
Related
In MS Access 2016, let's say I have 2 forms: frmMain and frmBaby.
I have embedded frmBaby as a subform on frmMain. I have embedded on frmBaby a control (let's say it's a textbox, but it could be any control) named tbxInput.
On frmMain, since frmBaby is a "control" on frmMain, I have given that control the traditional name of subfrmBaby.
Now, in VBA, an event on subfrmBaby passes the tbxInput control ByRef (as Me.tbxInput) to a function that is meant to return the .Left property of the parent of the control passed ByRef. That is, I need the function to determine the .Left property for the location of subfrmBaby on frmMain. (The function is more complicated than this, but for the sake of keeping this question let's just say the function is returning the .Left property value because the .Left value is what I need to perform the function.)
Let's say the function is: Public Function fncLocation(ByRef whtControl As Variant) as Long
(I use Variant so that null values can be passed.)
Here is the code that I expected to return the .Left value of the parent (i.e., subfrmBaby) of whtControl: lngLeft = whtControl.Parent.Left
However, that gives me an error of: "Application or object-defined error"
When I use the immediate window to check things out I find that whtControl.Parent.Name is "frmBaby" and not "subfrmBaby" which makes it problematic to reference the subform on frmMain since I cannot figure out how to get the actual name given to the control on frmMain from the object passed to the function and so I cannot reference the subform by name either.
Questions:
How can I get the .Left value for the parent of the control passed to this function?
How can I get the actual name assigned to the subform control on frmMain? In this case, I need the name of "subfrmBaby" rather than "frmBaby."
Thanks in advance for ideas.
You can do this by iterating the controls on the main form, assuming whtControl is the form object of the subform (if it's a textbox, it's whtControl.Parent.Parent and If c.Form Is whtControl.Parent Then)
Dim mainForm As Form
Set mainForm = whtControl.Parent
Dim c As Access.Control
Dim subformControl As Access.Control
For Each c In mainForm.Controls
If TypeOf c Is SubForm Then
If c.Form Is whtControl Then
Set subformControl = c
Exit For
End If
End If
Next
If Not subformControl Is Nothing Then
Debug.Print subformControl.Left
End If
Note that iterating controls comes at a performance penalty, but this code should still take milliseconds, not seconds. Also, since we test reference equality, it works even if the same subform is present multiple times on the parent form.
I just had this issue, and I think I solved it! Thanks to Eric A's answer above to get me started. I tweaked it and built on it for my use. In my case, I needed to save the "full" address of a control to build and facilitate a control log (used to log both user actions for auditing and to allow for users to "undo" an action). I have several duplicated subforms in several sub-form controls, and a few sub-sub forms (each displaying differently filtered and sorted data), so I couldn't rely on simply knowing the subform's name, I also needed the subform control name. This also leverages others' work (as noted in the code notes with some tweaks to allow easier re-use for us. I've posted it here, hopefully it will help someone else. I know I've used SO a lot.
How we use it:
On a form, after logging an action, we record the control's ID info, which calls a function to get the toppost form (this is used in conjunction with afterUpdate event so we refresh the main form and subform). We also use the HWND to validate some other items elsewhere, and to grab a form if we don't have the initial form reference. If you use this and modify it, please point back to here and give comments.
Specific Function Code to get Control "address" and get control from address
' Posted on StackOverflow 2022 February 18 in response to Question:
' https://stackoverflow.com/q/66425195/16107370
' Link to specific answer: https://stackoverflow.com/a/71176443/16107370
' Use is granted for reuse, modification, and sharing with others
' so long as reference to the original source is maintained and you
' help lift others up as others have done those who helped with this concept
' and code.
Private Function GetControlAddress(ByRef ControlTarget As Object, _
ByRef ParentForm As Access.Form) As String
' Used in concert with building a form ID, this allows reflection back to the specific
' subform control and containing subform.
Dim ControlSeek As Access.Control
If TypeOf ControlTarget Is Form Then
' You need to dig through the whole list to get the specific controls for proper reflection down.
For Each ControlSeek In ParentForm.Controls
If ControlSeek Is ControlTarget Then
GetControlAddress = ParentForm.Name & FormIDHWNDSep & ParentForm.Hwnd & FormIDHWNDSep & ControlTarget.Name & FormIDFormSep
Exit For
ElseIf TypeOf ControlSeek Is SubForm Then
If ControlSeek.Form Is ControlTarget Then
GetControlAddress = ParentForm.Name & FormIDHWNDSep & ParentForm.Hwnd & FormIDHWNDSep & ControlSeek.Name & FormIDFormSep
End If
End If
Next ControlSeek
Else
' If you're not looking for a form, then you can skip the slow step of running through all controls.
GetControlAddress = ParentForm.Name & FormIDHWNDSep & ParentForm.Hwnd & FormIDHWNDSep & ControlTarget.Name & FormIDFormSep
End If
End Function
Public Function GetControlByAddress(ByRef StartingForm As Access.Form, ByRef strControlAddress As String) As Access.Control
' Given a control address and a starting form, this will return that control's form.
Dim ControlTarget As Access.Control
Dim TargetForm As Access.Form ' This is a reference to the hosting control
'Dim ControlSeek As
Dim FormIDArr() As String
Dim FormInfo() As String
Dim ControlDepth As Long
Dim CurrentDepth As Long
If strControlAddress = vbNullString Then GoTo Exit_Here
FormIDArr = Split(strControlAddress, FormIDFormSep)
' Because there's always a trailing closing mark (easier to handle buidling address), we skip the last array
' value, as it's always (or supposed to be...) empty.
ControlDepth = UBound(FormIDArr) - LBound(FormIDArr)
' Split out the form's Specific Information to use the details.
FormInfo = Split(FormIDArr(CurrentDepth), FormIDHWNDSep)
' The specific control is located in the 3rd element, zero referenced, so 2.
Set ControlTarget = StartingForm.Controls(FormInfo(2))
' If ControlDepth is 1 (control is on passed form) you can skip the hard and slow work of digging.
If ControlDepth > 1 Then
For CurrentDepth = 1 To ControlDepth - 1
' Note: you start at 1 because you already did the first one above.
' Split out the form's Specific Information to use the details.
FormInfo = Split(FormIDArr(CurrentDepth), FormIDHWNDSep)
Set TargetForm = ControlTarget.Form
Set ControlTarget = TargetForm.Controls(FormInfo(2))
Next CurrentDepth
End If
Exit_Here:
Set GetControlByAddress = ControlTarget
End Function
Required Helper Functions
Note, I use a property for the separators as there is some user locale handling (no included), and it also ensures that if we do change the separator it remains consistent. In this example, I simply set them to a character which is unlikely to be used in a form name. You will need to ensure your forms don't use the separator characters.
Public Function hasParent(ByRef p_form As Form) As Boolean
' Borrowed concept from https://nolongerset.com/get-top-form-by-control/
' and modified for our uses.
On Error Resume Next
hasParent = (Not p_form.Parent Is Nothing)
Err.Clear ' The last line of this will cause an error. Clear it so it goes away.
End Function
Private Function GetFormObjectByCtl(ByRef ctl As Object, _
ByRef ReturnTopForm As Boolean, Optional ByRef strControlAddress As String) As Form
strControlAddress = GetControlAddress(ctl, ctl.Parent) & strControlAddress
If TypeOf ctl.Parent Is Form Then
If ReturnTopForm Then
If hasParent(ctl.Parent) Then
'Recursively call the function if this is a subform
' and we need the top form
Set GetFormObjectByCtl = GetFormObjectByCtl( _
ctl.Parent, ReturnTopForm, strControlAddress)
Exit Function
End If
End If
Set GetFormObjectByCtl = ctl.Parent
Else
'Recursively call the function until we reach the form
Set GetFormObjectByCtl = GetFormObjectByCtl( _
ctl.Parent, ReturnTopForm, strControlAddress)
End If
End Function
Public Function GetFormByCtl(ctl As Object, Optional ByRef strControlAddress As String) As Form
Set GetFormByCtl = GetFormObjectByCtl(ctl, False, strControlAddress)
End Function
Public Function GetTopFormByCtl(ctl As Object, Optional ByRef strControlAddress As String) As Form
Set GetTopFormByCtl = GetFormObjectByCtl(ctl, True, strControlAddress)
End Function
Public Property Get FormIDHWNDSep() As String
FormIDHWNDSep = "|"
End Property
Public Property Get FormIDFormSep() As String
FormIDFormSep = ";"
End Property
Interesting. I don't think you can.
As you have seen, the parent of whtControl is its form, frmBaby.
The parent of that one is frmMain. The subform control is not part of the object chain when "going up", only when going down.
If you always use the naming scheme as in the question, you could do something like this (air code):
strSubform = whtControl.Parent.Name
strSubformCtrl = "sub" & strSubform
Set ctlSubform = whtControl.Parent.Parent(strSubformCtrl)
Code to create new form instance of a closed form using form name
I want to replace the long Select Case list with a variable.
Full code of module
In Access 2010 I have a VBA function that opens a new instance of a form when given a string containing the form's name. By adding a form variable "frm" to a collection:
mcolFormInstances.Add Item:=frm, Key:=CStr(frm.Hwnd)
The only way I can figure out to open "frm" is with a Select Case statement that I've manually entered.
Select Case strFormName
Case "frmCustomer"
Set frm = New Form_frmCustomer
Case "frmProduct"
Set frm = New Form_frmProduct
... etc ... !
End Select
I want it to do it automatically, somewhat like this (although this doesn't work):
Set frm = New Eval("Form_" & strFormName)
Or through some code:
For Each obj In CurrentProject.AllForms 'or AllModules, neither work
If obj.Name = strFormName Then
Set FormObject = obj.AccessClassObject 'or something
End If
Next
Set frm = New FormObject
I just want to avoid listing out every single form in my project and having to keep the list updated as new forms are added.
I've also done some testing of my own and some reading online about this. As near as I can tell, it isn't possible to create a new form object and set it to an instance of an existing form using a string that represents the name of that form without using DoCmd.OpenForm.
In other words, unless someone else can prove me wrong, what you are trying to do cannot be done.
I think you are looking for something like this MS-Access 2010 function. (The GetForm sub is just for testing):
Function SelectForm(ByVal FormName As String, ByRef FormExists As Boolean) As Form
For Each f In Application.Forms
If f.Name = FormName Then
Set SelectForm = f
FormExists = True
Exit Function
End If
Next
FormExists = False
End Function
Sub GetForm(ByVal FormName As String)
Dim f As New Form
Dim FormExists As Boolean
Set f = SelectForm(FormName, FormExists)
If FormExists Then
MsgBox ("Form Found: " & f.Caption)
Else
MsgBox ("Form '" & FormName & "' not found.")
End If
End Sub
Here's an ugly hack I found:
DoCmd.SelectObject <acObjectType>, <YourObjectsName>, True
DoCmd.RunCommand acCmdNewObjectForm
The RunCommand step doesn't give you programmatic control of the object, you'll have to Dim a Form variable and Set using Forms.Item(). I usually close the form after DoCmd.RunCommand, then DoCmd.Rename with something useful (my users don't like Form1, Form2, etc.).
Hope that helps.
I'm facing a deadend When trying to call this sub :
Public Sub backblue(ByVal frm As Form, ByVal boxname As String)
For i = 1 To 3
CType(frm.Controls(boxname & i.ToString()), TextBox).BackColor = Color.LightBlue
Next
End Sub
with button click event :
Private Sub Button1_click and bla bla....
backblue(Me, "txb1_")
End Sub
Can anybody show me a suggestion to fix the code.
It throws "Object Referrence not set to an instance bla bla" error
For information the textbox names are :
txb1_1 , txb1_2 , txb1_3
(these are some of the many textboxes in the form that i want its bakcolor changed)
and these three textboxes are already created through designer, not from execution.
i did check the textboxes names and there's nothing wrong.
the form class is also public.
if they are the only textboxs on said form you can just loop through
For Each box as Textbox In frm.Controls
box.BackColor = Color.LightBlue
Next
This error will occur if you do not declare the Form class to be public.
Also, make sure the textbox names are really correct, although this will probably cause a different error.
If you create the textboxes during execution, make sure they are initialized with New and added to the form's Controls collection.
Try this....
Public Sub backblue(ByVal frm As Form, ByVal prefix As String)
For i = 1 To 3
Dim bxName as String = prefix & i.ToString()
Dim bx as TextBox = CType(frm.Controls(bxName), TextBox)
If bx Is Nothing Then
MsgBox("Unable to find text box " +bxName)
Dim mtch() As Control = frm.Controls.Find(bxName, true)
If mtch.Length> 0 then
bx = mtch(0)
Else
Continue For
End if
End If
Bx.BackColor = Color.LightBlue
Next
End Sub
Although, a better solution would be to either create the textboxes inside a control and pass that control to BackBlue or to create an collection that has the controls and pass that in. Which brings up what is most likely yor problem your control is contained in a sub component and thus is not in the main form control collection
Alternative, you could use either the tag of the control or create a component control that implements IExtenderProvider and add it to the form --all of the above would effectively allow you to define the controls and/how they should be handled at designtime.
It may really seem that the names generated by this loop may not be the names of the original textboxes. My suggestion is before setting this Color property verify that the names generated by this loop are indeed the actual names. Maybe output this in a messagebox:
MessageBox.Show(boxname & i.ToString()) for each loop before you set the property
Have the following code that ends up with a .Count variable. I would like to take that integer value and output it to a sentence in a custom UserForm. How do I do this within the Visual Studio 2012 designer. This is really stumping me. Thanks!
Public Shared Property mailItem As Object
Public Shared Property BodyMatchResults As MatchCollection
Public Shared Property SubjectMatchResults As MatchCollection
Public Sub Application_ItemSend(ByVal Item As Object, _
ByRef Cancel As Boolean) Handles Application.ItemSend
Dim mailItem As Outlook.MailItem = TryCast(Item, Outlook.MailItem)
If mailItem IsNot Nothing Then
Dim attachments = mailItem.Attachments
For Each attachment As Outlook.Attachment In attachments
AttachmentQuery(attachment, mailItem, Cancel)
Next attachment
End If
Dim BodyMatchResults As MatchCollection
Dim SubjectMatchResults As MatchCollection
Dim RegexObj As New Regex("\b(?!000)(?!666)(?!9)[0-9]{3}[ .-]?(?!00)[0-9]{2}[ .-]?(?!0000)[0-9]{4}\b")
BodyMatchResults = RegexObj.Matches(mailItem.Body)
SubjectMatchResults = RegexObj.Matches(mailItem.Subject)
If BodyMatchResults.Count > 0 Or SubjectMatchResults.Count > 0 Then
Cancel = True
MessageBox.Show((BodyMatchResults.Count + SubjectMatchResults.Count))
' Access individual matches using AllMatchResults.Item[]
Else
Cancel = False
End If
The UserForm is pretty basic with three buttons and a warning text above it. I would like to have in that text "There were either "BodyMatchResults.count" or "subjectmatchresults.count" in your email.
Well you obviously beging with your .count variable (which for arguments sake I'll assume is of type Integer). Hopefully you also have your Custom UserForm which we'll assume you have called UserForm.
In that UserForm add the following code:
Private _count As Integer
Public Sub New (ByVal count AS Integer)
InitializeCompponent()
_count = count
End Sub
You can then use the _count variable to dipaly the informationyou want displayed.
Now when you call your UserForm you can pass your .count variable to it so that it can be used there like this:
dim frm as New UserForm(NumberOfCountsIWantToDisplay)
This basic principle will work for most situations.
Edit
Clearly I'm not reading things properly. Your question had specifically asked about passing a Global variable. You should simply be able to refer to a publically defined global variable from anywhere within your application (so long as that variable has application scope). However global variables can be more trouble that they are worth and if in reality you simply want to pass one value from form a to form b then I would use the approach that I had originally outlined having misread the subject title, for which I apologise.
Please, can anyone help me with this problem:
I have a name(s) of control(s) in string format (str) and I want to set property (in code) of that controls using that string-name.
I try something like this but it doesn't work. Actually, I have a problem with expression. When I put exactly the name it works but when i use variable in string format it doesn't.
Dim str as String
str="k3"
Dim g As Image = CType(str, Image)
g.Source = New BitmapImage(New Uri("/APP;component/Icons/hero.png", UriKind.Relative))
This works:
Dim g As Image = CType(k3, Image)
While this does not:
Dim g As Image = CType(str, Image)
I think I understand what you are trying to do, to declare an object by a string...
Essentially for this to work you will need a custom function that returns the Object Type that you are seeking...
You will need to loop through each control and check the name of the control as a comparison, e.g. If oControl.Name.ToString = sString then Return oControl
Example
' A function to return a Control by the Control's name...
Public Function GetControlByName(ByVal oForm As Form, ByVal sName As String) As Control
Dim cReturn As New Control
Dim ctrl As Control
For Each ctrl In oForm.Controls
cReturn = ctrl
If ctrl.Name.ToString = sName Then
Return ctrl ' this is what we want!
End If
Next
Return cReturn
End Function
' Example Usage
Dim oButton As Button = GetControlByName(Me, "Button44")
If oButton.Name.ToString = "Button44" Then
MessageBox.Show("I have found your Button!")
Else
MessageBox.Show("Your button was NOT Found!")
End If
Obviously there is room for error with this function, because if sName is NOT found, then it will return the last ctrl found, therefore, you will need to ensure that the control you seek is indeed found, via the If statement as provided in the example above...
Furthermore, it may not loop through controls inside of containers, menus, etc, but I'm not sure on that, so you will need to check to ensure it's not having that problem...
(The Me in the statement will most likely be used more often than not, though Me could be the name of the form you are searching if you are running the code outside of the form you are searching the form with the function.)
FINALLY, to answer your question, you will need to change Control to Image, and Set CReturn as a New Image, and then use Return ctrl.BackgroundImage (etc) to return the image..