读取Sql Server数据库数据

 static List<Bumbershoot> GetTalbeFiling()
        {
            string server = ConfigurationManager.AppSettings["SqlServer"].ToString();
            string database = ConfigurationManager.AppSettings["SqlDatabase"].ToString();
            string uid = ConfigurationManager.AppSettings["SqlUserID"].ToString();
            string pwd = ConfigurationManager.AppSettings["SqlUserPWD"].ToString();;

            string connectionString = @"server=" + server + ";database=" + database + ";uid=" + uid + ";pwd=" + pwd;
            int offday = Convert.ToInt32(ConfigurationManager.AppSettings["offDays"].ToString());

            string queryString = "SELECT * FROM [Eform_Data_Output].[dbo].[TB_Non_Bumbershoot_EV] a left join [Eform_Data_Output].[dbo].[TB_NotesName] b";
            queryString += " on a.EVRequestor=b.Owner where Cast(a.gtCompleteDate as date)>=Cast(dateadd(day,-"+offday+",getdate())as date)";
            queryString += " and Cast(a.gtCompleteDate as date)<Cast(getdate() as date) and a.gtWFStatus='Approved'";

            List<Bumbershoot> oList = new List<Bumbershoot>();
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand command = new SqlCommand(queryString, connection);
                command.CommandTimeout = 0;
                connection.Open();
                SqlDataReader reader = command.ExecuteReader();

                while (reader.Read())
                {
                   //业务操作
                 }
                reader.Close();
                connection.Close();
            }
            return oList;            
        }