In textchanged event Access Violation Exception occurs frequently.
it's a security level problem may be. try this: Go to the Project Property page, and then go into the Security Section.
"Enable ClickOnce Security Settings" will be seen checked. uncheck it
reference: https://social.msdn.microsoft.com/Forums/windows/en-US/e599b2e2-3cda-43ad-b15f-a69b4fea1a75/dynamic-filling-of-textbox-autocomplete-not-working?forum=winforms
I too wanted to populate a TextBox AutoCompleteCustomSource using the users input from that same textbox as a filter, so I had the TextChanged event grabbing data to fill the dropdown suggestions list.
I tried so many different ways to fill the data, which all resulted in random or constant Access Violation. If I'm not wrong I finally have it nailed down I think.
It seems that it doesn't matter what method you're using to actually add the items to the AutoCompleteCustomSource. The problem arises when you go to replace those items.
Before changing any of the data in TheTextbox.AutoCompleteCustomSource, you need to first set:
TheTextBox.AutoCompleteSource = AutoCompleteSource.None
Then you can use any method you like to clear and/or refill it:
TheTextBox.AutoCompleteCustomSource.Clear()
TheTextBox.AutoCompleteCustomSource.AddRange(AutoSuggestItems)
Set the AutoCompleteSource back to CustomSource when you're done:
TheTextBox.AutoCompleteSource = AutoCompleteSource.CustomSource
' prevent that annoying selection of the whole textbox text
TheTextBox.Select(Me.TheTextBox.Text.Length, 0)
*Note: If you also set TheTextBox.AutoCompleteMode while changing the data like I was originally, it causes the Access Violation error later. (SO FAR) the above method has worked correctly. I hope this is my last update to this solution :)
Related
I have cmbCountry on a form as an unbound dropdown. The dropdown works as expected. I have setup a textbox called txtCM_ID on the same form, in which I want to display the ID that was selected in the dropdown.
When I enter the record source for the textbox as =Forms![frm_ClientModel]!cmbCountry.Column(0) access automatically changes it to read =[Forms]![frm_ClientModel]![cmbCountry].[column](0)
My version returns the correct information when i test it in the VBE Immediate window. The code that access produces returns the below when run in the Immediate window:
runtime error 450: Wrong number of arguments or invalid property
assignment
The frustrating thing is, that regardless of where or how i enter the code in the control source, access changes it to its version. When the form is opened the txtCM_ID simply remains blank.
I have also tried to go around this problem by changing my reference to the following: Forms("frm_ClientModel").Controls("cmbCountry").column(0)
While this version (also tested and ok in VBE) doesn't produce an error, it too returns nothing in the text box.
What am I missing / doing wrong / overlooking?
Use just
=[cmbCountry]
To access the value of cmbCountry from other control.
I was not able to specifically determine why this happened, but ended up solving the issue by using the OnClick Event of the Dropdown and writing the needed info into the Textbox via VBA with this:
Private Sub cmbCountry_AfterUpdate()
Me.txt_CMID = Forms("frm_ClientModel").Controls("cmbCountry").Column(0)
End Sub
If anyone else finds an answer as to why form controls did not work properly I would be interested in hearing from you.
Please press here to see my gif that could provide a better understanding of my problem.
As you can see above that it's kinda a problem, but I don't know what to do, so I am hoping that some of you could tell me what and how to do with this. It's my first time to see this " Object variable or With block variable not set" problem...
I don't have any code to show you because I was using the default way to make bound textbox and then using a subform with lots of subform. (See the gif for the idea of the layout)
It's in danish language, but I think this should be a common problem as everywhere in the world, so...
It's in access 2013, in case you was asking.
uhm... If there're any questions, please ask right away.
So you have a subform within a subform and you are receiving an error when trying to set the properties of the innermost subform that link it to it's parent form (which I will refer to as the middle subform).
Here's a thought. Try opening the "middle subform" in the designer (ie do not open the main form, just the middle subform from the navigation panel). then set the properties. This has a better chance of working.
Here's some references I used for inspiration, the first of which stresses the fact that the linked "fields" are actually EITHER control names OR field names from the dataset and why it is often best to use control names.
http://www.fmsinc.com/microsoftaccess/forms/subform/master-link-fields.asp
http://access.mvps.org/access/forms/frm0031.htm
Working in both A2003 & A2007.
How do we ensure that a selected TextBox gets the focus when the form loads? If we put MyTextBox.SetFocus in the Form_Load then we get the error:
can't move the focus to the control
This form is designed for rapid data entry, and the form somewhat rearranges itself based on the last used settings. So there are several different textboxes any of which may need the focus depending on the user. We can't just fix it in design time by giving MyTextBox TabIndex=0.
The help says something about calling Repaint which just doesn't make any sense at all:
You can move the focus only to a
visible control or form. A form and
controls on a form aren't visible
until the form's Load event has
finished. Therefore, if you use the
SetFocus method in a form's Load event
to move the focus to that form, you
must use the Repaint method before the
SetFocus method.
The best bet in this case, is to ensure that the textbox to get focus is numbered 0 in the Tab Index property.
You cant set the focus as the controls don’t really exist yet, try putting the code in the OnActivate event instead
Or just put a DoCmd.Repaint in the OnLoad event before trying to set the focus. Both should work but I'm not near a computer to check
In my experience, I've always gotten that error when the control I was trying to set focus to was either 1)not visible or 2)not enabled. I assume you've already checked those, but it would be worth double checking at runtime when you get the error message (especially since you said you are shuffling the controls at runtime).
I use the .SetFocus method pretty regularly without trouble. I don't recall ever getting an error message when setting focus to a control that already has it as Remou stated in his answer.
I believe there is also a third case that occurs if you try to set focus to a control in the form header/footer of a bound form that has had all of its records filtered out. I know that situation causes "disappearing" contents in an unbound combo box, but I think it may also play havoc with the SetFocus method. If you are opening the form in Data Entry mode, though, that should not be an issue.
Move SetFocus to the form's On Current event. Should work then unless perhaps the form's record source contains no records and you've set the form's Allow Additions property to No. In that case your text box will not be available to SetFocus on, but in my testing it doesn't throw an error.
I have multiple combo and option boxes whose visibility is set true or false depending on user selection of other parent option boxes.
I am using the AfterUpdate() function for the parent option boxes. This method has been working fine.
However when I set the values of the option boxes in VBA code (Me.MyOptionBox = 1), there is no "update" to make the child option and combo boxes appear. It works when I manually click on the option, but if I set it in the code nothing changes except for the option box selection. It doesn't make sense to see the option box set correctly but the code responsible for checking which option is selected not work.
Does anyone have any ideas on how to get around this? I just want the form to be updated once I set the values of the option boxes. What is the "update" that AfterUpdate() is referring to anyway?
I have tried MyForm.Repaint and MyForm.Requery but these do not work either.
Any ideas?
You can call the OptionBox_AfterUpdate() method directly - after you set the values.
I'm pretty sure this is intentional. The problem is avoiding circular recursive updates, when you consider that a control can be changed by a user and by two forms of code (explicit and bound data).
For bound controls, changes in the data change the controls.
For user input, changes in the control change the data, plus whatever dependendencies you explicitly specify in events.
For changes caused by your code, the assumption is that you need to manually apply all the consequences of the state change you are coding.
If you are using bound controls, you can change the datasource and have the consequences applied automatically.
In VBA, most control events do not fire when the control is updated programmatically, rather than manually. You must specify the code that is to run after the programmatic update.
By "I am using the AfterUpdate() function," you mean you added an event handler for the AfterUpdate event, right?
If that handler is not firing when you expect it to, you could always call your handler directly (instead of letting the event fire it) where necessary. But that probably wouldn't be the best way of doing it; more likely there is another event that should be calling your handler instead of or in addition to AfterUpdate. I don't remember the names of combo box events, but isn't there something like ItemChanged or SelectionChanged or something?
My Access 2000 DB causes me problems - sometimes (haven't pinpointed the cause) the "book" form won't close. Clicking its close button does nothing, File -> Close does nothing, even closing Access results in no action. I don't have an OnClose handler for this form. The only workaround I can find involves opening the Vba editor, making a change to the code for that form (even adding a space and then immediately deleting the space), and then going back to close the "book" form, closing it, and saying "no, I don't want to save the changes". Only then will it close. Any help?
Here's a forum post describing, I think, the same problem you face. Excerpt belows states a workaround.
What I do is to put code on the close button that reassigns the sourceobject
of any subforms to a blank form, such as:
me!subParts.sourceobject = "subBlank" 'subBlank is my form that is
totally blank, free of code and controls, etc.
docmd.close acForm, "fParts", acSaveNo
The above 2 lines is the only way I've found to prevent the Access prompt
from popping up.
http://bytes.com/forum/thread681889.html
Another alternative is
(Me.Checkbox)
or my preferred syntax:
(Me!Checkbox)
It seems to me that there is much confusion in the posts in this topic. The answer that was chosen by the original poster cites an article where the user had a prompt to save design changes to the form, but the problem described here seems like it's a failure of the form to close, not a save issue (the save issue came up only in the workaround describing going to the VBE and making a code change).
I wonder if the original user might have incorrect VBE options set? If you open the VBE and go to TOOLS | OPTIONS, on the GENERAL tab, you'll see several choices about error handling. BREAK ON UNHANDLED ERRORS or BREAK IN CLASS MODULE should be chosen, but it's important to recognize that if you use the former, you may not see certain kinds of errors.
There's not really enough detail to diagnose much more, other than the fact that the reference to the checkbox control seemed to have been causing the problem, but there are a number of Access coding best practices that can help you avoid some of these oddities. The code-related recommendations in Tony Toews's Best Practices page are a good place to start.
That sure is weird. Do you have any timer controls on the form? If you do, try disabling it in the OnClose.
There is a possibility that the message box that asks if you want to save changes is being displayed behind the form. I believe that this message box is modal so you must click yes or no before you can do anything with the form which is why you can't close it.
Does your form have an unload event? That can be canceled, and if it is, the form won't close when it's in form view. It will only close in design view, which, when you edit the vba code is what the form does in the Access window when you're editing the code.
Does your form have a checkbox, toggle button or option button? There's a bug in Access 2000 where Access won't close if you test the value without explicitly using the Value property in the vba code, like this:
If Me.chkbox Then
versus:
If Me.chkbox.Value Then