CheckBox List losing the checkbox checked after post back

Santosh Kumar

12y10k.NET

Hi,

I have check box list and a check box, After binding the data to the checkbox, if we select the all checkboxes then the main checkbox gets selected its fine till now but when we unselect any check box in checkbox list and clicks a button then all checkboxes in the checkboxlist getting unchecked.

How to Hold the checked items of the checkbox list even after the post back.

Javascript code

function pageLoad(sender, args) 
{         CheckAllProject();     
 }

function CheckAllProject () {         
         $("[id*=lbxProjectList]").focus(function () {  
        if ($("[id*=lbxProjectList] input:checked").length == $("[id*=lbxProjectList] input").length) {    
                     $("[id*=CheckBox1]").attr("checked", "checked");              
       } else {              
           $("[id*=CheckBox1]").removeAttr("checked");        
             }      
       });      
      }

It Looks like in the following way

Project List:CheckBox Select All Projects
Checkbox 1 Project1
Checkbox 2 Project2

Button Submit

5 Replies

Know the answer? Post it — somebody with the same question will find it here.

Jaganathan Bantheswaran12y ago
Accepted answer
Updated jsfiddle http://jsfiddle.net/Jaganathan/CfcxL/34/
Santosh Kumar12y ago
@Jaganathan, Thanks for the reply again, In the below link

http://jsfiddle.net/Jaganathan/CfcxL/33/

the event is firing on button click, but for me the after all checkboxes are select then main checkbox need to be checked how i can add the event for the checkbox list which checks all the check boxes got selected.
Jaganathan Bantheswaran12y ago
You can do something like this,

http://jsfiddle.net/Jaganathan/CfcxL/33/
Santosh Kumar12y ago
@Jaganathan, Thanks for the reply, here, if i comment the that javascript code, i am able get the values, so no need of session or hidden field. please suggest me any other way to achieve to check the main check box if all the other checkboxes gets selected.

Is there any way to add the onclick event to the asp.net checkbox list instead of calling event in pageload event in javascript.

Here is my asp code of the check box list
Jaganathan Bantheswaran12y ago
Hi,

You can do something like to add a hidden field/session to the page that represents the state of the checkbox, then update the field's value to "ON" or "OFF" for example, whenever the checkbox is clicked.

Or else, handle the click event on click side and do ajax call to server to updated something.