Passing parameters to a sub report ...

Right I hope I can explain this one properly ...

I have a report with a sub report in the detail area.
The records in my sub report need filtering by a date range.
I have 2 parameters, namely Start Date and End Date.
These parameters have been created in my main "Design" area.

Because this main area doesn't access the table whose data I need to filter I am having trouble filtering my records.

So .... what do I do ?

As far as I can tell the obvious thing would be to create the 2 parameter fields in the sub report, but then I would have the same problem in reverse, i.e. The main report won't see them.

Can anyone suggest any possible solutions ?

Thanks in advance for any help offered.

Here's a link to the post below this... You pretty much just have to link your parameters through the sub routine object.

http://www.vbforums.com/showthread.php?t=393149

Oh I didn't think of that !
Well now I can't seem to define how the date will fall between the parameters, but like most problems with CR, keep looking round and you'll find an option somewhere :)

Cheers Besoup !

Quote:

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Well now I can't seem to define how the date will fall between the parameters

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Once you have setup the links between the Sub-report and the Main report, double click on the Sub-Report object that is on the Main report. This will open the sub-report in design mode. If the Links are setup properly Crystal will create a record selection formula using the parameters. You can modify the formula through the Report -> Edit Selection Formula -> Record menu (in Crystal 8.5).

Change it to something like

{TabelName.DateFieldName} >= {?Pm-?StartDate} And
{TabelName.DateFieldName} <= {?Pm-?EndDate}

The ?PM-? parameter field names are automatically generated by Crystal.

I'm on version 9 so its slightly different, but basically I can get to "Modify Subreport Links". My problems start when I am actually there !
I can click over "Start Date" and "End Date" parameter fields to the right, but in the dropdown list labelled "Subreport Parameter Field to Use" all I get is "?Pm- ?Start Date" to choose from.
The other dropdown box gives me the following options:

Report Fields


Database Fields
---Condition Details---

That last one is the table I am using in the subreport.
Any of the above optins I choose the program basically ignores, and oes back to highlighting the "Report Fields" option.
Also, if I check the "Select Data in Subreport based on Field" checkbox it then goes and unchecks it.
There is a field on the Condition Details table called "Date", which is what I am trying to set my parameters round.

I hope I'm making sense. I can pretty much see what you guys are trying to tell me, which is basically modify the links to the subreport, but I don't have what I need available in these dropdown boxes to successfully do that.

Do I have to declare 2 local fields in the sub-report, and use those to link to the parameter fields in the main report ?

Sorry to be a pain, I'm on a steep learning curve with this !

OK I sussed it.
I didn't realise I could define my date range parameter field in the sub-report. I had it at the top level, which is why I couldn't see it !
So ... I took it out of there, put it in the sub-report, used it in the "Select Expert", realised that as a cr*p way of looking at things, switched to Formula Editor, sorted it in there using the "in" clause ...... and bingo :)))

This report has taken me 2½ days, but when I started it I knew b*gger all about Crystal Reports. Now I have multiple embedded "on demand" sub reports and parameters governing what comes out.

Gold star for me :)))