Comparing values in reports with values in subreports

[Flupke]

I have a report with a value that is a sum in a group footer. In that report is a subreport with also a value that is a sum in a group footer.
How can I make a formula that compares these two values.
When I make a formula in the main report, I can of course access the value in the main report, but I do not seem able to access the value in the subreport in order to compare those two.
Can anyone help me?

Many thanks,

Michel

 

[lbass]

Set up the value in the subreport as a shared variable. If the subreport is linked to the main report on the group field, then your shared variable would look like:

whileprintingrecords;
shared numbervar subamt := sum({table.amt});

You must place this formula on the subreport,e.g., in the subreport footer.

Then in the main report, create a formula and place it in a section below the one in which the subreport executes,i.e., if the subreport is in GH_a, place the formula in an inserted GH_b section or in a GF section:

whileprintingrecords;
shared numbervar subamt;
if subamt > sum({maintable.amt},{maintable.groupfield}) then 1 else 0 //sample comparison

In the main report, you should also set up a reset formula in case the subreport has a null value, and this formula should be placed in a section before the one in which the subreport is executing or after the section in which the comparison formula is located:

whileprintingrecords;
shared numbervar subamt := 0;

-LB

 

[Flupke]

Thank you very much for your kind help.
However, I did not manage to achieve my goal, because I'm not so familiar with programming in Crystal Reports.

Am I right in supposing that "subamt" is the name of the variable?
In the formula in the subreport, I get an error message "A number is required here". When I delete the colon between "subamt" and "=", then I can save the formula without errors

whileprintingrecords;
shared numbervar subamt=sum({tblTV_Stortingdetails.TVSD_Bedrag});

As a result in the subreport, I do not see a value, but only "False".

Now, how can I verify that the correct value is calculated?
When I put the code

whileprintingrecords;
shared numbervar subamt;
subamt - Sum ({tblTV_Inkomstendetails.TVID_Bedrag}, {tblTV_Sessies.TVSE_Begintijd}, "daily")

in my main report, the result makes me believe the value of the variable stays zero. So I think the value in the subreport is not correctly calculated or transmitted.
As a result in the main report, I only see the value of
-Sum ({tblTV_Inkomstendetails.TVID_Bedrag}, {tblTV_Sessies.TVSE_Begintijd}, "daily")

So I believe the formula in the subreport is not correctly calculated.

Can you please help me further?

Many thanks,

Michel

 

[lbass]

Using Crystal syntax (make sure that's what is selected in the formula box), you must leave in the colon. The error message suggests that the datattype of {tblTV_Stortingdetails.TVSD_Bedrag} is not numeric. If it is a currency, change the formula to:

whileprintingrecords;
shared currencyvar subamt := sum({tblTV_Stortingdetails.TVSD_Bedrag});

Note that you can name the variable anything, i.e., you could change "subamt" to "x" or anything you wish.

-LB

 

[Flupke]

I'm almost getting there, but not quite.

You were right about the currency! Now I have no error, the colon is there and when I preview the subreport only, the correct values are displayed on the subreport.
So far so good!

But when I view the main report, the shared variable does not have the value it should have, but remains zero.
I tried to put the variable in different sections, but the result stays the same.
This is the code in my main report:

whileprintingrecords;
shared currencyvar StortingenPerDag;
StortingenPerDag - Sum ({tblTV_Inkomstendetails.TVID_Bedrag}, {tblTV_Sessies.TVSE_Begintijd}, "daily")

I only get the value after the "-" in negative. So I assume that the variable StortingenPerDag remains zero, although it is passed from the subreport with the correct value when I view the subreport.

What could be the problem?

Many thanks for your help and greetings,

Michel

 

[lbass]

First, you have to place the first formula in the report footer of the subreport. Then the formula for the calculation MUST be in a section below the one in which the subreport is executing.

I think you should explain in which section the subreport is located and then where you are placing the reset and calculation formulas in the main report.

-LB