You might find it useful to check out the sample in https://wisej.com/support/question/issue-with-bindingsource-addingnew-event
The sample initializes the values of a newly added row.
Let me know if this works for you.
did you try attaching to the DataGridView´s RowsAdded or UserAddedRow event ?
If your DGV is bound to a BindingList you can also attach to the corresponding event.
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