I have a c# Winforms application with an unbound DataGridView whose rows contain column data that will be used to update a table in an Access database. My plan is to first validate the data before updating the records in the table looking for duplicates, etc., and then display error information in child rows attached to the rows in the DataGridView. This would be similar to the debugging errors that are displayed in the Error List of Visual Studio, but the error rows would be in the DataGridView attached to the rows that caused the error. Hopefully, the original rows, the ones that caused the errors, would have a plus sign in the row header similar to the way Access displays rows and related child rows with column headers different from the parent column headers.
I am hoping that someone can direct me to a c# sample that will show me how to add child rows to the DataGridView rows.
Rob E.