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ListBox show Elements but not .F. when nothing to be sho
Message
From
04/06/2018 04:22:05
 
 
To
04/06/2018 03:36:23
Cetin Basoz
Engineerica Inc.
Izmir, Turkey
General information
Forum:
Visual FoxPro
Category:
Object Oriented Programming
Environment versions
Visual FoxPro:
VFP 9 SP2
OS:
Windows 10
Miscellaneous
Thread ID:
01660530
Message ID:
01660533
Views:
65
>>Hi,
>>
>>I have a listbox, populated with an array: Thisform.aNames
>>The list is restricted to the first 10 elements only so NumberOfElements is set 10
>>The array is constructed in myForm with aNames[10,2]
>>
>>and populated with a select:
Select naw.fullname, naw.ID from NAW where  substring(fullname,1) = ? m.lcLetter into array aNames[10.2]
>>this works fine, however, when there is not enough data to populate 10 fields the remaing are shown in the listbox as .F., how should I change to avoid this, prefer to show [ ] (nothing)
>
>Honestly I don't understand how that really works in the first place. I just tested thinking I might be wrong but that kind of syntax is giving me error ("SQL: Statement is invalid"). You can't really specify the array size, can you?
>Whatever the initial size of an array is, after the select statement it would be [selected rows count, columns count].
>
>
>Local array laCheck1[300,100], laCheck2[1]
>Select * from (_samples+'data\customer') into array laCheck1
>Select * from (_samples+'data\customer') into array laCheck2
>
>? Alen(laCheck1,1), Alen(laCheck1,2)
>? Alen(laCheck2,1), Alen(laCheck2,2)
>
>
>The only exception to this is when select doesn't return any rows. Then the array's original size and values are preserved.

Correct, that is my case.
When one is working with the application for the first time, there are yet no records in the tables and this will result in 10 rows with .F. which I do not like.
So I will now parse through the array and replace all the .f. values with '' easy enough

Thanks for your solution,

Regards,
Koen
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