i have one field isprimary and am using it in editable grid so when i select any of the checkbox i want to disable all the remaining checkboxes
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Can you elaborate more, you question ?
If you select one of the checkboxes and then immediately disable all of the others the only way the User can change their mind is to de-select the selected one and then select another option. That then leads me to think what you're really asking is how can we only restrict the selection to one option at a time? Would that be your actual requirement?
please use {a!save(<name of cdt>.isprimary ,null),a!save(<name of cdt>[ri!index].isprimary ,ri!Index)} under your checkbox field
It is by default available.