Thank you for contacting us.
Can you please share with us what do you mean by " I want the header checkbox to be set to null to indicate to the user that there's a row(s) selected in the grid"?
When you mark the CheckBox
as checked, all items or some part of them will be selected based on your custom logic. Respectively, once you uncheck it, this checked icon will disappear.
You may set IsThreeState property of the CheckBox
to True and if you do not have any items to select, it should be null and AllMembersAreChecked
is of Nullable type.
Do you mean that you need to modify the check icon to look like CheckBox's indeterminate
I look forward to hearing from you.
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