Csharp/CSharp Tutorial/LINQ/All
Содержание
All method
<source lang="csharp">using System; using System.Collections.Generic; using System.Linq; using System.Text;
class Customer { public string ID { get; set; } public string City { get; set; } public string Country { get; set; } public string Region { get; set; } public decimal Sales { get; set; } } class Program { static void Main(string[] args) { List<Customer> customers = new List<Customer> { new Customer { ID="P", City="Tehran", Country="Iran", Region="Asia", Sales=7000 }, new Customer { ID="Q", City="London", Country="UK", Region="Europe", Sales=8000 }, new Customer { ID="R", City="Beijing", Country="China", Region="Asia", Sales=9000 }, new Customer { ID="T", City="Lima", Country="Peru", Region="South America", Sales=2002 } }; bool allAsia = customers.All(c => c.Region == "Asia"); Console.WriteLine (allAsia); } }</source>
All with condition
<source lang="csharp">using System; using System.Collections; using System.Collections.Generic; using System.Text; using System.Linq; public class MainClass{
public static void Main(){ int[] numbers = { 2, 6, 1, 56, 102 }; Console.Write(numbers.All(e => e % 2 == 0) ? "Yes, they are" : "No, they aren"t"); }
}</source>
All with Predicate to Return True
<source lang="csharp">using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass {
public static void Main() { string[] presidents = {"G123456", "H", "a", "H", "over", "Jack"}; bool all = presidents.All(s => s.Length > 5); Console.WriteLine(all); }
}</source>
All with string length
<source lang="csharp">using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass {
public static void Main() { string[] presidents = {"G", "H", "a", "H", "over", "Jack"}; bool all = presidents.All(s => s.Length > 3); Console.WriteLine(all); }
}</source>
Using All to determine whether an array contains only odd numbers.
<source lang="csharp">using System; using System.Collections.Generic; using System.Linq; using System.Text; public class MainClass {
public static void Main() { int[] numbers = { 1, 11, 3, 19, 41, 65, 19 }; bool onlyOdd = numbers.All(n => n % 2 == 1); Console.WriteLine("The list contains only odd numbers: {0}", onlyOdd); }
}</source>