Last post Sep 14, 2011 06:49 AM by Nasser Malik
Jul 16, 2006 10:58 PM|aspfan|LINK
Jul 17, 2006 09:22 AM|sbyard|LINK
One very simple way (and sometimes one I use for checkboxes in read-only grids) is to have three images, one for each state. Clicking the image simply changes to the next state. You could wrap all of this up into a custom control.
Clearly, the use of images reduces the amount of styling. You could implement a box with a text based "tick" in it also to get more styling attributes such as box/tick size, colour, etc.
Sep 14, 2011 06:49 AM|Nasser Malik|LINK
How to implement tri-state check box control in asp.net
ASP.NET TriState CheckBox Made Easy
see following it resolved ..