using System;
using System.Linq;
var values = new int[] { 5, 10, 20 };
// We can convert an int array to IQueryable.// ... And then we can pass it to Queryable and methods like Average.
double result = Queryable.Average(values.AsQueryable());
Console.WriteLine(result);11.6666666666667
IQueryable. The IQueryable interface inherits from IEnumerable. We can use IQueryable in a similar way as IEnumerable to act upon collections of elements with a unified type.
Info There is no advantage to using IQueryable over IEnumerable here. And it is simpler to use IEnumerable.
using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
static void Main()
{
// List and array can be converted to IQueryable.
List<int> list = new List<int>();
list.Add(0);
list.Add(1);
int[] array = new int[2];
array[0] = 0;
array[1] = 1;
// We can use IQueryable to treat collections with one type.
Test(list.AsQueryable());
Test(array.AsQueryable());
}
static void Test(IQueryable<int> items)
{
Console.WriteLine($"Average: {items.Average()}");
Console.WriteLine($"Sum: {items.Sum()}");
}
}Average: 0.5
Sum: 1
Average: 0.5
Sum: 1
Development of an IQueryable class appears to be both complicated and difficult. It is probably best left to the implementors of the .NET Framework.
A summary. The .NET Framework contains features that are used for the development of the .NET Framework itself. Other features like "dynamic" are also focused on framework development.
Dot Net Perls is a collection of pages with code examples, which are updated to stay current. Programming is an art, and it can be learned from examples.
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This page was last updated on Nov 23, 2023 (edit).