Hi jdymond,

That is because get_item() is not a member of those event args.  If memory serves me correctly, I believe it has get_cell() or getCell().  If you want to find everything, I suggest putting a debugger; statement in the handler and examining the methods available.

regards,
David Young 

I have moved this the the ClickHandler Event and and now I am getting 'undefined'.

var

isChecked = false;

Resolved. I switched from using an unbound checkbox to a TemplateDataField and it seemed to have resolved the issue.

I see what you are saying. However, I mimicked this code from a sample project and it works fine there. Simple WHDG Click Event.

        function ClickHandler(sender, args) {

           isChecked = args.get_item().get_row().get_cell(0).get_element().children[0].checked;

            var rowIndex  = args.get_item().get_row().get_index();

            var childGrids = whdg.get_rows().get_row(rowIndex).get_rowIslands();

            for (var j = 0; j < childGrids[0].get_rows().get_length(); j++) {

                childGrids[0].get_rows().get_row(j).get_cell(0).get_element().children[0].checked = isChecked;

            }
        }

Hi again,

Once more, you're using the wrong code.  You need to check that the actual item is a row before getting it as such.  It is possible it could be the cell in the click event.  Another thing is that the checkbox is not an <input type="checkbox" />  It is done with an image (so we can have a partial state).  Once you have the cell, you could do get_value() to get whether it is checked or not (for a Boolean field and so long as it isn't partial).  Off of these event args, there is a get_type() or something.  Check that out.  And once again, I suggest dropping in a debugger; statement and checking what is available in the event args.

-Dave