How to update the status of Checkbox in Repeater in a page.

Hi

I have page with a repeater. Each row in a repeater has a check box. My requirement is:

IF a user clicks on one check box then it should be set to true and other check boxes should be set to FALSE.

I have a code in OnValidate function of checkbox where I check if any of the check boxes are clicked.. If the check box is clicked I try to set other check boxes to FALSE but the status is not updated in the GUI as shown in the picture.




Any thoughts?