Access any Stored Procedure with or without parameter

class DataAcess
    {
      SqlConnection con;
        //spName:name of stored procedure
        //spParams:parameters required for stored procedure. 
        public DataSet ExecuteDataSet(string spName, object[] spParams)
        {
            try
            {
                SqlCommand sqlcom = GetSqlCommand(spName, spParams);
                SqlDataAdapter sqlda = new SqlDataAdapter(sqlcom);
                DataSet dsetResult = new DataSet();
                sqlda.Fill(dsetResult);
                return dsetResult;
            }
            finally
            {
                CloseConnection();
            }
        }

        private SqlCommand GetSqlCommand(string spName, object[] spParam)
        {
            SqlCommand com = new SqlCommand(spName, GetConnection());
            com.CommandType = CommandType.StoredProcedure;
            //SqlCommandBuilder automatically derive the parameters
            SqlCommandBuilder.DeriveParameters(com);
            com.Parameters.RemoveAt(0);
            if (spParam != null || spParam.Length != 0)
            {
                for (int index = 0; index < spParam.Length; index++)
                {
                   //value will be set
                    if (spParam[index] != null)
                        com.Parameters[index].Value = spParam[index];
                    else
                        com.Parameters[index].Value = DBNull.Value;
                }
            }
            return com;
        }

        //read the connection string from web.config(web) /app.config(window)
        private SqlConnection GetConnection()
        {
            con = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["MyConn"]);
            con.Open();
            return con;
        }
        private void CloseConnection()
        {
            con.Close();
        }
}

      private void DisplayMachine(string machineName)
        {
            DataAcess dataAcess = new DataAcess();
            //parameters required for procedure,if no parameter then pass Null
            object[] spparam = { machineName };
            DataSet ds = dataAcess.ExecuteDataSet("Usp_DisplayMachine",spparam);
        }