Hi Breno,
Thanks for you update.
We don’t have support to checkbox for grouping headers inbuilt but we can achieve your requirement (“select all item’s from one category like select all item’s belonging group 1”) through workaround solution. Please find the sample under the following link:
In this above sample, we have appended checkbox to the category element(Group 1,Group2,Group 3) in the create of DropDownList as shown below code:
<code>
function create(args){
obj=$("#dropdown").ejDropDownList("instance");
CategoryLen=obj.ultag.find(".e-category");
for(var i=0;i<CategoryLen.length;i++)
{
var checkEle='<input type="checkbox" id="'+$(CategoryLen[i]).text()+'" class="e-check-input-category">';
$(CategoryLen[i]).append(checkEle);
}
$(".e-check-input-category").ejCheckBox({ change:"OnChange" });
}
</code>
Regards,
Kasithangam