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();
}
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();
}
