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Crystal Reports 11 - if-then syntax question SQL Server 2005

Posted on 2011-02-23
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Last Modified: 2012-05-11
Hello experts,

In a formula field, I have t he below syntax:

If {@RefType} = 'P' then {@Guarantor Name} else
If {@RefType} = 'I' and left({transactions.tracking_desc_40},1) = 'D' then 'DMERC Region B' else
If {@RefType} = 'I' and (left({transactions.tracking_desc_40},1) <> 'D' or {transactions.tracking_desc_40} = '' or isNull({transactions.tracking_desc_40})) then {payer_mstr.payer_name} else
''

This seems to function accurately when {transactions.tracking_desc_40}  starts with 'D', but when it's blank or null, it doesnt print payer_mstr.payer_name column, and we have verified that there is indeed a value in the payer_mstr.payer_name column as we have unhid it directly on the report.

Is there a problem with the way we have structured the nested if statements?

Thanks!
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Question by:robthomas09
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mlmcc earned 500 total points
ID: 34965863
You have to test the NULL condition first.  Any test on  a NULL value except IsNull terminates the formula with undefined result.  Try it this way

If {@RefType} = 'P' then
     {@Guarantor Name}
else If {@RefType} = 'I' and ( isNull({transactions.tracking_desc_40}) or
                                                       {transactions.tracking_desc_40} = '' or
                                                  left({transactions.tracking_desc_40},1) <> 'D') then
    {payer_mstr.payer_name}
else If {@RefType} = 'I' and left({transactions.tracking_desc_40},1) = 'D' then
   'DMERC Region B'
else
   ''

mlmcc
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Author Closing Comment

by:robthomas09
ID: 34966477
Thanks!
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