bool CheckCustomerPassword() { customersTableAdapter1.Fill(dataSet11.CUSTOMERS); DataSet1.CUSTOMERSDataTable customerDataTable = (DataSet1.CUSTOMERSDataTable)dataSet11.Tables["CUSTOMERS"]; string email = tb_email.Text; string password = tb_password.Text; if (email.Length * password.Length < 1) { return(false); } foreach (DataRow data in customerDataTable.Rows) { if (data["c_email"].ToString() == email) { if (data["c_pwd"].ToString() == NewAccount.EncryptMD5(password + data["c_birth"].ToString())) { return(true); } } } return(false); }