public static int GetCustomerCount(DateTime d1, DateTime d2, bool isclose, bool useconstr = false, string newconstr = "p")
{
var ret = 0;
var ta = new SalesAmountDetailsTableAdapter { Connection = { ConnectionString = useconstr ? newconstr : _constr } };
if (!isclose)
ret = (int) (ta.GetInvoiceCount() ?? 0);
else
ret = (int) (ta.GetInvoiceCountByDate(d1, d2) ?? 0);
return (int) ret;
}
