Thursday, July 21, 2005

Getting 'unchecked' value from Struts checkbox

The following was posted last year on a different blog. I'm consolidating posts here and you never know when this info may come in handy :)

Having just spent half the afternoon trying to get a page with a checkbox to work correctly with Struts I stumbled across the following. I knew that an unchecked value was never returned in the form and, as we are using Struts DynaActionForms, was starting to think about over-riding the Form when I came across a solution that is so simple it's embarrassing.

The solution is to add a hidden field immediately after the checkbox field i.e.

<html:checkbox property="currentLocation" value="true"/>
<html:hidden property="currentLocation" value="false"/>
When the form is submitted if the checkbox is selected the hidden field is ignored, but if the checkbox is empty it isn't in the form so the hidden field is used.
Works a treat.
at

39 comments:

  1. Anonymous22 July, 2008 21:34

    Thanks for excellent code snippet. I was wondering to use reset method on view bean but this worked and saved half a day for me

    ReplyDelete
  2. Anonymous31 July, 2008 13:43

    I wasted around a day but this simple code has helped me a lot
    Thanks
    Khasim

    ReplyDelete
  3. Anonymous27 May, 2009 02:29

    Wonderful, thanks a lot man!

    ReplyDelete
  4. Anonymous24 September, 2009 12:28

    i tried many ways.But i didnt get any solution.it tried this one its woking excellent!!! Thanks man

    ReplyDelete
  5. White Pixie09 April, 2010 10:05

    Good tips ;)

    ReplyDelete
  6. Unknown05 May, 2010 17:18

    Arghhh... such an easy solution, can't believe I didn't come up with this myself about 4 hours ago... thanks for the help... it works great!

    ReplyDelete
  7. Korhil24 March, 2011 13:19

    Thanks a lot, you are my hero.

    ReplyDelete
  8. Mark Dathorne17 May, 2011 14:06

    Bloody thing was driving me !INSANE! until this wonderful solution.
    Thanks.
    Mark

    ReplyDelete
  9. Paul Rivers08 July, 2011 00:08

    Thanks for posting this - it worked, so much easier than the other methods.

    ReplyDelete
  10. SyedAli03 October, 2011 05:32

    Thanks a lot man, It works!

    Imtiaz Ali

    ReplyDelete
  11. SyedAli03 October, 2011 05:33

    This comment has been removed by the author.

    ReplyDelete
  12. El lado oscuro de java17 February, 2012 18:33

    Nice, this work!

    ReplyDelete
  13. Diego Montoya07 March, 2012 16:32

    Thanks a lot.

    An ingenius solution

    ReplyDelete
  14. Peter Jerald29 August, 2012 13:25

    Excellent thinking. Thanks a lot :)

    ReplyDelete
  15. Anonymous05 October, 2012 12:31

    Still very useful after 7 years :) Thank you!

    ReplyDelete
  16. Birendra05 December, 2012 20:48

    Wonderful,it works.
    Simple & Excellent thinking.

    ReplyDelete
  17. Anonymous06 December, 2012 10:49

    You are the best, beacouse you saved my life!!! :)

    ReplyDelete
  18. Anonymous25 February, 2013 15:50

    Thank you, thank you, thank you!! Found this solution by fluke. Been struggling with this for 2 days. Why this isn't in any of the struts examples I have no idea.

    ReplyDelete
  19. Anonymous21 March, 2013 22:07

    Thank you, your solution helps me at last.

    ReplyDelete
  20. Anonymous17 April, 2013 14:33

    Hi

    This is not the right solution.
    The ordersin which parameters are sent to the server depend on the browser so:




    is not the same as



    The right solution is to set the boolean value in form action form in the reset method.

    public void reset(ActionMapping mapping, HttpServletRequest request) {
    setCurrentLocation(false);
    }

    Like this the boolean value is false by default.
    If the checkbox is checked, the value will be change to true


    Regards

    ReplyDelete
  21. Anonymous13 May, 2013 11:26

    Thank you very very much

    ReplyDelete
  22. Anonymous06 June, 2013 13:30

    Thank you, this is still helping people!

    ReplyDelete
  23. kniveko07 June, 2013 11:52

    Cheers, this saved me a lot of time.

    ReplyDelete
  24. Anonymous18 July, 2013 20:27

    thanks a lot for sharing this, saved so much time!!!

    ReplyDelete
  25. Unknown18 September, 2013 08:52

    Excelenet post, it saved me a lot of time :-) Thanks.

    ReplyDelete
  26. Bala19 November, 2013 14:06

    Thanks saved my time

    ReplyDelete
  27. Bozyszcze14 January, 2014 13:31

    thx m8

    ReplyDelete
  28. Anonymous19 April, 2014 15:41

    Thanks so much for posting this tip! Saved me so much time trying to figure out a solution!
    -Rema.

    ReplyDelete
  29. Muhammad Salman16 September, 2014 22:12

    Thank you so much man, saved my day.

    ReplyDelete
  30. Neo13 October, 2014 07:34

    Sorry to say this, but this post is not quite recommended practice according to Struts mannual which says that Boolean type value should be used with tag. So, the guy who recommended the following solution is good and should be preferred instead of the original post -

    The right solution is to set the boolean value in form action form in the reset method.

    public void reset(ActionMapping mapping, HttpServletRequest request) {
    setCurrentLocation(false);
    }

    ReplyDelete
  31. Mayank21 November, 2014 16:22

    Great Work!!

    It saved our night @ office :-)

    ReplyDelete
  32. Anonymous19 February, 2015 13:58

    Thank you. After an hour of frustration you saved my day.

    ReplyDelete
  33. kalapur05 June, 2015 15:40

    Our best developers had spent 2 days to investigate this checkbox issue when we found your solution.
    You helped us a lot! Great job!

    ReplyDelete
  34. Anonymous18 November, 2015 13:39

    it worked great for me.

    ReplyDelete
  35. Anonymous05 January, 2016 12:36

    I lost more than a day on that unsuccessful. Save me! Thank you!

    ReplyDelete
  36. Anonymous21 March, 2016 16:28

    Wow !! What an answer! I was just giving up when I saw this post... You save my day!

    ReplyDelete
  37. Amrin07 December, 2016 11:30

    Thanks alottttttttt buddy...I wasted one full day for it .

    ReplyDelete
  38. Adam14 March, 2017 07:57

    2017 and its still good

    ReplyDelete
  39. Unknown30 June, 2017 11:59

    Great,work appreciating

    ReplyDelete