Esempio n. 1
0
        static void Main()
        {
            MQ app = new MQ();

            int[] nums = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

            var myQuery = app.QueryMethod1(ref nums);

            //execute myQuery
            foreach (string s in myQuery)
            {
                Console.WriteLine(s);
            }

            //modify myQuery
            myQuery = (from str in myQuery
                       orderby str descending
                       select str).
                      Take(3);

            // Executing myQuery after more
            // composition
            Console.WriteLine("After modification:");
            foreach (string s in myQuery)
            {
                Console.WriteLine(s);
            }

            // Keep console window open in debug mode.
            Console.WriteLine("Press any key to exit.");
            Console.ReadKey();
        }
Esempio n. 2
0
        static void Main()
        {
            MQ app = new MQ();

            int[] nums = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

            // QueryMethod1 returns a query as the value of the method.
            var myQuery1 = app.QueryMethod1(ref nums);

            // Query myQuery1 is executed in the following foreach loop.
            Console.WriteLine("Results of executing myQuery1:");
            // Rest the mouse pointer over myQuery1 to see its type.
            foreach (string s in myQuery1)
            {
                Console.WriteLine(s);
            }

            // You also can execute the query returned from QueryMethod1
            // directly, without using myQuery1.
            Console.WriteLine("\nResults of executing myQuery1 directly:");
            // Rest the mouse pointer over the call to QueryMethod1 to see its
            // return type.
            foreach (string s in app.QueryMethod1(ref nums))
            {
                Console.WriteLine(s);
            }


            IEnumerable <string> myQuery2;

            // QueryMethod2 returns a query as the value of its out parameter.
            app.QueryMethod2(ref nums, out myQuery2);

            // Execute the returned query.
            Console.WriteLine("\nResults of executing myQuery2:");
            foreach (string s in myQuery2)
            {
                Console.WriteLine(s);
            }


            // You can modify a query by using query composition. A saved query
            // is nested inside a new query definition that revises the results
            // of the first query.
            myQuery1 = from item in myQuery1
                       orderby item descending
                       select item;

            // Execute the modified query.
            Console.WriteLine("\nResults of executing modified myQuery1:");
            foreach (string s in myQuery1)
            {
                Console.WriteLine(s);
            }

            // Keep console window open in debug mode.
            Console.WriteLine("Press any key to exit.");
            Console.ReadKey();
        }