Crystal Reports: How to allow “set to null” when prompting for values to pass to subreports

crystal-reportsnullprompt

I have created a report which links into subreports. I created parameter fields to feed into the parameters of the subreports using subreport links.

If I do not add a subreport link and therefore the subreport is prompting for the value directly it will allow the set to null option. However, if the enter value prompt is being generated from the parameter field I inserted then the set to null option is not displayed.

I have 12 subreports so I can't prompt for the same values 12 times.

I am using Crystal Reports XI designer and not .net

Best Answer

set up formulas with nothing in them (null values) to pass to the subreports

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If you need to check specifically for an empty string over null, I would think checking against "" is your best bet, using the === operator (so that you know that it is, in fact, a string you're comparing against).

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How to we pass a parameter from main report to subreport in crystal reports XI

Right-click on the subreport object and choose Change SubReport Links, then select how the parameter is to be used by the subreport.

Best Answer

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How to we pass a parameter from main report to subreport in crystal reports XI

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