// vissiter viss = new vissiter();
        public bool login_admin(vissiter viss)
        {
            //dbo.pro_loginvisster
            SqlCommand cmd = DBhelper.con.CreateCommand();

            cmd.CommandType = CommandType.StoredProcedure;
            cmd.CommandText = "dbo.pro_loginvisster";

            cmd.Parameters.Add("@adminName", SqlDbType.VarChar, 50).Value = viss.AdminName;
            cmd.Parameters.Add("@adminpwd", SqlDbType.VarChar, 15).Value  = viss.AdminPwd;
            //返回值
            SqlParameter parret = new SqlParameter("@retvalues", SqlDbType.Int);

            parret.Direction = ParameterDirection.ReturnValue;
            int ret = 0;

            cmd.Parameters.Add(parret);
            try
            {
                DBhelper.con.Open();
                cmd.ExecuteNonQuery();
                ret = (int)parret.Value;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            finally {
                DBhelper.con.Close();
                DBhelper.con.Dispose();
            }
            if (ret == 1)
            {
                return(true);
            }
            else
            {
                return(false);
            }
        }
 public bool login_admin(vissiter viss)
 {
     return(viser.login_admin(viss));
 }