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How to make a cursor writable?
Message
Information générale
Forum:
Visual FoxPro
Catégorie:
FoxPro 2.x
Divers
Thread ID:
00110139
Message ID:
00110163
Vues:
24
Josh,

I am kinda lurking, but maybe you can answer a ?.

So...I am inside someone elses vfp app. I want to use the
same dbf they have open. I issue
Use Joesfile alias billsfile again

The error is: file is already in use!!! I know that ....
I want another copy of it..

I have been able to the file by determining it's alias,
"selecting:" it and putting it back in shape before my function
returns... But why Can't I open it in my own data session?

thanks
bill
chicago

>The first thing you need to do is to make sure FoxPro creates the cursor as a disk file rather than just a filter on your existing table. You can do this by adding a dummy field like this:
>
>SELECT *, ' ' AS Dummy ;
>  FROM mytable ;
>  WHERE mycondition ;
>  INTO CURSOR mycursor
>
>You don't need to do this when your SELECT involves a join, because a join also forces FoxPro to create a disk file. To make mycursor writeable do this:
>
>USE DBF('mycursor') AGAIN IN 0 ALIAS mycursor2
>mycursor2 is now writeable.
>
>In VFP 5.0 you can put the NOFILTER keyword after the name of your cursor to tell VFP that you want it to create a file.
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