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ComboBox or SubForm?

675 Contributor
I have a form, bound to tblMain. I have tblSub, which is related to tblMain with a foreign key, all nice and proper database design.

I want to display the rows of tblSub in a control, but neither ComboBox nor SubForm seem to be easy to implement.

The primary purpose of this control is that when a row is clicked, then "strWork = strWork & xxx" where xxx is the correct field of the subform, or the correct column of the combobox.

I will also need to edit, delete, and add rows, both by the user, and with VBA.

ComboBox:
Use - when clicked, the .column contains the correct text
Update - Cannot know what to change, and will need another form to actually do any modification of the data. Note that this is not a "Not in List" issue as it may be an edit of a row that already exists, therefore not-in-list fires, but new row should not be added.

SubForm:
Use - there is no nice event for a row being clicked. OnCurrent fires for other reasons also, so the concatination creates errors. Will require OnClick for every field.
Update - easy, as all updatable fields can be displayed, unlocked, and enabled.

How should this problem be resolved?
Apr 2 '09 #1
17 3282
NeoPa
32,569 Recognized Expert Moderator MVP
I don't have a full solution for you OB, but with a subform, could you not add an unbound control (CheckBox, CommandButton, etc) that triggers the code instead of OnCurrent. Typically, just by clicking on the control, the desired record will be selected in the subform. Just an idea.
Apr 3 '09 #2
OldBirdman
675 Contributor
Yes, of course I can do that. It is just that it takes space.

I have needed this solution in several databases, and others might also. I am fishing for ideas. Thank you for yours.
Apr 3 '09 #3
NeoPa
32,569 Recognized Expert Moderator MVP
I hear you OB.

I'm not aware of a more built-in alternative. Let's see what some of the other experts can come up with.
Apr 3 '09 #4
DonRayner
489 Recognized Expert Contributor
Hey OB,

If you use a subform in data-sheet view you can use the forms click event to fire your code. When a user clicks on the record-selector the event will fire.
Apr 4 '09 #5
OldBirdman
675 Contributor
Thanks for another suggestion. Yes, either continuous forms or datasheet view will (optionally) have record selectors. The click event fires if the record selector is clicked. It does not fire if any field is clicked.

A combobox or listbox will fire a click if any column is clicked, not just the left side.

A subform is easier to correct/update, because cboControl.colu mn(2) = "xxx" produces an error, even though the control is bound. Subforms are harder to work with during design, however.
Apr 4 '09 #6
OldBirdman
675 Contributor
I've decided that I need to go with a sub-form. I will have a click event on each textbox, and no record selectors, as space is a consideration. The subform will make it easier to add, delete, and update the records.

I used the wizard (access 2000) to create the subform control. I cannot display my records in the correct order.

1) Can I specify a sort order in design view? If yes, how?

2) From VBA, how do I change the sort order of a subform from code in the main form? From code in the subform?

Main form name = fMain; Sub-form name sfDetails
Apr 6 '09 #7
NeoPa
32,569 Recognized Expert Moderator MVP
@OldBirdman
The order records are shown in a form depends on the RecordSource. A query can have the ORDER BY clause set which will give you your required sorting.
Apr 6 '09 #8
NeoPa
32,569 Recognized Expert Moderator MVP
@OldBirdman
If you're talking about changing the sort order after the form has already been displayed, then each form has an OrderBy property. See Referring to Items on a Sub-Form for how to reference that from your main form. I don't know if a .Requery of the subform is required after changing the property.
Apr 6 '09 #9
OldBirdman
675 Contributor
I've avoided using subforms because I can't make any changes without closing everything, doing my editing, and then restarting the program, but that is probably another thread.

So I'm really a beginner here. My subform (on the main form) has properties SourceObject and LinkChildFields which appear to be the determining factors as to what is displayed. I don't think these are what you refer to.

Within the subform itself, there is an OrderBy property. That seems to do nothing. Why not? So the only way is to work with the RecordSource property directly? This would therefore be true in both design view and VBA.
Apr 6 '09 #10

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