ReadOnly field setting is ignored in Grid Add.
E.g. an auto-filled AddedTimeStamp should be shown on List page, but should not be edited, even on the Add Page, of course.
I know I can disable field visibility in GridAdd Mode via code, but that’s tedious and error-prone.
Is there another option?
If not, could you extend the fields settings by a GridAdd Tag (similar to the Add Tag)?
Where did you set your ReadOnly property? Make sure you set it in the correct page (i.e. Detail Grid Page).
Yes, I’ve seen the discussions regarding field visibility change via code, but my suggestion is to add a property GridAdd (check box) in the field settings, similar to Add check box.
This would be simple and clear in comparison with fiddling with code.