mydb = new db();
ArrayList list = new ArrayList();
//List<datetime> list = new List<datetime>();
string query1 = "select free_dates from I_mgr_free_dates where vacancy_id=" + "\'" + DropDownList1.SelectedItem + "\'";
SqlDataReader read1 = mydb.getData(query1);
while (read1.Read())
{
list.Add(Convert.ToDateTime(read1["free_dates"]));
}
mydb.CloseConnection();
DateTime day1 = (DateTime)list[0];
MessageBox.Show(day1.ToString());
</datetime></datetime>
我要检索最频繁的元素从数组列表