Get row number and column number for linq foreach

I require a row number and column number to be fetched whenever error happens on certain row inside foreach.

My code goes like this:

DataTable.AsEnumerable()
.Where(r => r.Field<string>(columnName).Length == 0).ToList()
.ForEach(p => p.SetField<string>(columnName, " "));

My QUESTION : How to get row number and column number using this LINQ query