Crystal Report Show hidden field if a detail record shows a number

Hi,

What would be the best way to show a suppressed textbox in a Crystal Report group header whenever any detailed record doesn't display a value in a particular field?

If none of the detail records shows a number in a field called mytestfield, the textbox in the group header should remain suppresed.

If, however, any or all the records in the detail section show a number in mytesxtfield, the textbox in the group header should show up so the user can see it.

Thanks.
TheUndeciderAsked:
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mlmccCommented:
WHy are there cases with no values?

Are you suppressing the field in details or is it NULL values?

If NULL values you can add a formula like
Name- IsNotNull
If IsNull({DetailField}) then
    1
Else
    0

You can then suppress the field in the group header with a formula

Sum({@IsNotNull},{GroupField}) = 0

mlmcc

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