Previous Row Reference

[dennistmh]

Dear All,

 

May I know is there a way to reference a column's value of previous row??

 

Thanks,

Dennis

[Nick]

Hi dennistmh,

 

I just can think in a servlet containing a variable where you will save the value you want to use later.

 

I mean, for the first row use the AfterDetailEval method of the servlet to save the value you need in a variable in the servlet (remember the servlet is a class). Then for the next row use the BeforeDetailEval method to put the value in your servlet variable in a parameter in the report, and you've got it.

 

I'm not a guru in JasperReport and don't know if there is a better way to do this, so I hope this helps.

:whistle:

 

Regards,

Diego.

[dennistmh]

Dear Diego,

 

Really thanks for the solution. Since I am just start to evaluate this reporting tools, my company hasn't buy the menu. Anyway, I can get your idea to solve my problem. However, I really don't know how to do it. Could you / anybody give me a sample of it?

 

I am really happy that if you or anybody give me some reference link for this reporting tools before I buy the menu.

 

Thanks a lot,

Dennis