Re: [libreoffice-users] List box not updating field with bound value

On 06/19/2011 06:48 AM, Tom Davies wrote:
> Hi :)
> Hopefully this is in Base rather than Calc.
Good guess...since I didn't exactly say. Sorry.
> The 2 tables need to be connected
> by some sort of relationship.
One would think. Yet, use of the Tools > Relationship functionality 
makes no difference at all to my results. I find that amazing. I guess 
Frieder got it right when he said that list boxes in LO simply supply 
contents, and NOT record keys. Not good, if true, although that IS what 
appears to be happening. It would also account for the non-persistence 
of my list box selection. A text field placed into an integer field 
should die a quick death, and it appears to be doing that. I THOUGHT I 
was getting the key field for the selected record. Not happening though.
> I don't think spreadsheets work as relational
> databases?
Agreed. Spreadsheets don't have record keys, so no relation is possible. 
They can be used as read-only data sources in LO, though, I believe. 
Haven't tried this yet.
> One of the 'obvious' 'easy answers' (and therefore most commonly
> missed)  is if the relationship is not defined in Base.
Well, it's not defined in Access either until done explicitly, and that 
is certainly possible also in Base. Doing this doesn't affect the 
problem at all, though.

The more I think about it, the more I become convinced that Frieder 
nailed it. I have to test this, but I think what's happening is that the 
list box selection I make simply produces the contents of the selected 
record. That shows up briefly in the text box, but cannot go from there 
to the record field underlying it, as THAT is an interger (to hold a key 
field's contents), and the list box selection is a text string.

OK...if so, then I need a macro to write the key of the selected  record 
into the appropriate record field of my main table. oh, I'm not looking 
forward to this...I don't even know where to go to learn about LO 
Basic's object model, nor do I know where the language reference is. But 
if it's the only way then...

I'm afraid there NO documentation anywhere on this.

Thanks for your thoughts!

(and I'm still going to show up on the Base documentation list, probably 
tomorrow)

t.
> It might be defined in
> Access but it's worth checking that Base shows the same thing.
>
> Thanks and regards from
> Tom :)
>
>
>
>
> ________________________________
> From: Frieder<delorfr@googlemail.com>
> To: users@global.libreoffice.org
> Sent: Sun, 19 June, 2011 12:53:44
> Subject: Re: [libreoffice-users] List box not updating field with bound value
>
> Am 19.06.2011 11:07, schrieb Tom Cloyd:
> > I know this is complicated, but I'll try to be simple and clear.
> >
> > I'm building a form that displays a single record at a time from a table, as a
> > set of text boxes. The form displays all data in the table by moving
> > successively to each record. Every field except the primary key field can be
> > edited.
> Are you using Calc or Base??
> And do you automatic initialise the form ore do you use a macro to initialise
> the form and fill it with contents?
> > I have a list box bound to one of the fields. It displays a field from another
> > table (which has only a key field and a data field - text). That table has only
> > a few records. It's sole purpose is to contain the list to be display in the
> > list box.
> >
> > My intention is that selecting a value from the list box will cause the field
> > in the main table to be updated by the key of the record containing the selected
> > list item in the list table. That key is field #1 in that table, so my bound
> > value is 1.
> >
> > The list is displaying perfectly. However, in the form, the field to which the
> > list box is bound displays nothing, ever. It DOES initially have a value, and
> > certainly should after I make a list box selection. It just never shows any
> > value, however. Moreover, looking at the main table's record outside of the form
> > shows that it contains only "0", regardless of which list item I select.
> >
> > So...
> >
> > 1. Why is no value ever displayed in the form, even though there IS a value in
> > the record? In MS Access, it would show, I believe.
> > 2, Why is the selected list item's key never updated into the master table
> > field. It IS bound, according to the property dialog.
> It would bee much easier to help you if you put the document online, so
> everybody can test it and see what is the best solution for your problem
> 1.There is a big difference between MS Listboxes and LO-Listboxes.
> In MS you can address items in a list-box by there key number, in LO only by
> there name.
> 2.You can connect a simple macro to the "list-box-change"  event that updates
> the master table field.
> > I don't see my error, I'm afraid. Any suggestions would be appreciated.
> I'm not sure, if my suggestion is really what you want.
>
> -- Unsubscribe instructions: E-mail to users+help@global.libreoffice.org
> In case of problems unsubscribing, write to postmaster@documentfoundation.org
> Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette
> List archive: http://listarchives.libreoffice.org/global/users/
> All messages sent to this list will be publicly archived and cannot be deleted


--
Unsubscribe instructions: E-mail to users+help@global.libreoffice.org
In case of problems unsubscribing, write to postmaster@documentfoundation.org
Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette
List archive: http://listarchives.libreoffice.org/global/users/
All messages sent to this list will be publicly archived and cannot be deleted