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Former Member
Sep 07, 2013 at 09:30 PM

Restrictions in Datawindow Modify() or Direct Property Access Syntax?

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Hi,

Are there any restrictions on how complex could be an argument string in Datawindow Modify() function or in datawindow property access syntax?

I need to control Enabled property of a Datawindow field with complex statement using many IFs.

When I try to Modify() Enabled property using the following kind of expression (string)

if(1=1,1,0)=1 OR if 1=1,1,0)=1 OR if 1=1,1,0)=1 OR if (1=1,1,0)=1 OR if (1=1,1,0)=1 OR if (1=1,1,0)=1

I'm getting a (validation) error pointing to the last character of the submitted string.

It does not matter if it is done by dw.Modify() function or by property access syntax: i.e. dw.object.field.enabled='expression'

However it is OK if I remove any one of the IF() components inside the expression string. I.e. if I have not 6 but only 5 IF conditions. Also the same expression is always validated from inside datawindow painter.

So, there number of IFs in such expressions is limited to 5 (or 6? , it is saturday today, so I'm not sure was it 5 or 6, IFs really...)

Environment: PB 12.5 Classic, Windows XP.

Thank you in advance