C# Enumerable OrderBy(IEnumerable, Func)
Description
Sorts the elements of a sequence in ascending order according to a key.
Syntax
public static IOrderedEnumerable<TSource> OrderBy<TSource, TKey>(
this IEnumerable<TSource> source,
Func<TSource, TKey> keySelector
)
Parameters
TSource- The type of the elements of source.TKey- The type of the key returned by keySelector.source- A sequence of values to order.keySelector- A function to extract a key from an element.
Example
The following code example demonstrates how to use OrderBy to sort the elements of a sequence.
/*from www . ja v a2 s .c o m*/
using System;
using System.Linq;
using System.Collections.Generic;
public class MainClass{
public static void Main(String[] argv){
Pet[] pets = { new Pet { Name="a", Age=8 },
new Pet { Name="b", Age=4 },
new Pet { Name="c", Age=1 } };
IEnumerable<Pet> query = pets.OrderBy(pet => pet.Age);
foreach (Pet pet in query)
{
Console.WriteLine("{0} - {1}", pet.Name, pet.Age);
}
}
}
class Pet{
public string Name { get; set; }
public int Age { get; set; }
}
The code above generates the following result.
