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Multiselection - YES
Posted: Thu Feb 13, 2014 7:27 pm
by petrika
Form field > select it to get green boxes around > Control > General > scroll down > 'Multiselection' option : what is the meaning?
Which type of control it works?
If the form field is a 'Listbox', I can select multiple data?
thnx
Re: Multiselection - YES
Posted: Thu Feb 13, 2014 8:34 pm
by Villeroy
You can not bind a list box to multiple values in the same field. This may be useful for programmers. Until now I have never used a multi-selection list box.
Re: Multiselection - YES
Posted: Thu Jan 29, 2015 7:13 pm
by papijo
Villeroy wrote:You can not bind a list box to multiple values in the same field. This may be useful for programmers. Until now I have never used a multi-selection list box.
I agree that "You can not bind a list box to multiple values in the same field." But, how on earth can the multiselection be "useful for programmers"? Why does
the OO Wiki say "
If the MultiSelection property is set to True, more than one entry can be selected. " if it does not work?
Re: Multiselection - YES
Posted: Thu Jan 29, 2015 8:16 pm
by Villeroy
You can select multiple values but only one field in one record can be written to the database backend. Did you try to bind a a multi box to a database field? If Base would be more developed, it would be thinkable to bind a multi-box to an array field but this is not the case. Base can not handle any array fields at all.
Re: Multiselection - YES
Posted: Thu Jan 29, 2015 9:08 pm
by MTP
papijo wrote:how... can the multiselection be "useful for programmers"?
A macro could read the multiple selections out of the list box and write them or use them wherever the programmer wanted.
Re: Multiselection - YES
Posted: Thu Jan 29, 2015 11:49 pm
by Villeroy
- MultiListBox.odt
- Test multi-select box with Bibliography database.
- (16.3 KiB) Downloaded 607 times
Re: Multiselection - YES
Posted: Thu Apr 06, 2017 4:01 pm
by arfgh
so then which is the purpose of multi-select in base forms listbox ? or... is there a way to use it ?
Re: Multiselection - YES
Posted: Thu Apr 06, 2017 8:17 pm
by UnklDonald418
One common use that comes to mind would be to select a few items from the list and press a button to display a list properties for each of the selected items for comparison.
Re: Multiselection - YES
Posted: Sun Apr 09, 2017 7:09 pm
by arfgh
so in base forms cant i use it ?
Re: Multiselection - YES
Posted: Sun Apr 09, 2017 7:27 pm
by Villeroy
You can use it anywhere you can.
Re: Multiselection - YES
Posted: Tue Apr 11, 2017 11:57 am
by arfgh
in base forms with the multiselection enabled, and using the control, i am unable to do multiple selections on a listbox, what am i missing ?
Re: Multiselection - YES
Posted: Tue Apr 11, 2017 12:08 pm
by Villeroy
A list box puts one value into its linked field.
Re: Multiselection - YES
Posted: Tue Apr 11, 2017 1:42 pm
by arfgh
so it is a design limitation ?
ok, but surely we can do some trick from basic and when detect two selected items show some msgbox or some.... otherwise we have that feature unuseful.
Re: Multiselection - YES
Posted: Tue Apr 11, 2017 3:36 pm
by Villeroy
YOU are the programmer. It is YOUR obligation to collect an array of values from your control element and do what you want with it.
myself wrote:You can not bind a list box to multiple values in the same field. This may be useful for programmers. Until now I have never used a multi-selection list box.
Re: Multiselection - YES
Posted: Tue Apr 11, 2017 11:19 pm
by UnklDonald418
Here is an example of how the Multiselection might be used. It is based on the stand alone form the Villeroy posted earlier.