Doubble Calculate??

[Fekri]

Hi,

I have 3 column in my report, which I need to calculate in one of them "column1-column2"

ok, this I did. but in the form footer, i have to make sum all the data, which is in column3.

So, I made an event in "on format" of report detail like this:
dim s
column3=column1-coulmn2
s=s+column3

And in "on format" of report footer:

[text32]=s

Finally, every thing is good but the result value is *2,
I checked by break and I found the detail event will run and calculate 2 time but I don't know why and why the value of lines in detail is not *2?????

can you help me???

thanks
Ali

 

[Remou]

Instead of s=s+column3, use a running sum for "column4". You can use Sum in the report footer:
[tt]Sum(Column1-Column2)[/tt]

Don't forget that you can hide controls, if you wish.

 

[genomon]

Keep in mind that format events usually fire at least twice
for reports, so you will perform any calculations in these events twice.

Outside of a dog, a book is man's best friend. Inside of a dog it's too dark to read.

 

[genomon]

Forgot to add: That's why Remou's example will work well - it will always return a sum of data, rather than incrementing a variable!

Outside of a dog, a book is man's best friend. Inside of a dog it's too dark to read.

 

[Fekri]

Thanks to all,

But I had to use my method event to calculate other value too.

I found my mistake:

I was made Running sum in column3 before and I didn't know, and when I removed it the calvulation event run one time.

thank you to all.
Ali

 

[dhookom]

Fekri,
I still think it is a mistake to write any code to aggregate values when you can generally use simple expressions in control sources. If you want the sums of Column1 - Column2, you should be able to add a text box to the report footer section with a control source of:
=Sum(Column1 - Column2)
This would need modification if what you refer to as "in the form footer" is actually the report's Page Footer section.

Duane MS Access MVP
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[Fekri]

Thanks dhookom,

yes, you are right.

Appreciate your advise and thanks a lot

best regards
Ali Fekri