private static SqlConnection sc;

        public static SqlConnection Sc

        {

            get

            {

                string StrConWeb = ConfigurationManager.ConnectionStrings["YunNiao"].ConnectionString;

                try

                {

                    if (sc == null)

                    {

                        sc = new SqlConnection(StrConWeb);

                        sc.Open();

                    }

                    else if (sc.State == ConnectionState.Closed)

                    {

                        sc.Open();

                    }

                    else if (sc.State == ConnectionState.Broken)

                    {

                        sc.Close();

                        sc.Open();

                    }

                    return sc;

                }

                catch (Exception e)

                {

                    throw new Exception(e.Message);

                }

            }

        }



 &n