Hi Manolo,
We ensured your sample and were able to reproduce the
issue in our end. So we suggest you to add the following codes in checkAll
function of your sample as a work around to resolve it.
<code>
function checkAll(sender, check) {
if (check) {
sender.checkAll();
var val =
sender.element.val();
sender.value(val == "" ? null : val);
}
else
sender.unCheckAll();
}
</code>
We have created an incident for
your reported bug, you can follow the updates for fix through that incident
DT Link: http://www.syncfusion.com/support/directtrac/incidents
Regards,
Keerthana.