asp.net数据库操作3——reader

if(!Page.IsPostBack)
{
SqlConnection conn = new SqlConnection(con);
conn.Open();
string strSql = "select * from 公告";
SqlCommand cm = new SqlCommand(strSql,conn);
SqlDataReader dataReader = cm.ExecuteReader();
while(dataReader.Read())
{
Response.Write(dataReader.GetString(1));
}
dataReader.Close();
conn.Close();
}