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db1.oleDbConnection1.Open();
OleDbCommand cmd = new OleDbCommand("select lb.Account,money,LendDate from lb,reader where lb.Account=reader.[account]",db1.oleDbConnection1 );
OleDbDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
DateTime t_m = dr.GetDateTime(2);
string money_m =dr.GetString (1); string account_m=dr.GetString (0);
DateTime t_now = DateTime.Now;
int days = DateDiff(t_m ,t_now );
if (days > 30)
{
string fee = Convert.ToString((days - 30) * 0.1 + money_m);
OleDbCommand cmd1= new OleDbCommand(string .Format ("update reader set money ='{0}' where [account]='{1}' ",fee,account_m ), db1.oleDbConnection1);
cmd1.ExecuteNonQuery();
}
}
dr.Close();
db1.oleDbConnection1.Close();
»ÆÉ«´¦±¾ÊÇ double money_m =dr.Getdouble (1);Õ³´íÁË¡¡
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