void WriteHistoryToDatabaseEntityClickCommand() { using (var db = new HistoryContext()) { foreach (ListViewData item in ListViewCollection) { var hist = new History(); hist.Number = int.Parse(item.ListView_No); hist.a = double.Parse(item.ListView_a); hist.b = double.Parse(item.ListView_b); hist.c = double.Parse(item.ListView_c); hist.Discriminant = double.Parse(item.ListView_Discriminant); hist.x1 = item.ListView_x1; hist.x2 = item.ListView_x2; hist.dbDateTime = item.ListView_Datetime; db.Histories.Add(hist); } db.SaveChanges(); } }