C# List ForEach
Description
List performs the specified action on
each element of the List
Syntax
List.ForEach has the following syntax.
public void ForEach(
Action<T> action
)
Parameters
List.ForEach has the following parameters.
action- The Action delegate to perform on each element of the List.
Example
The following code uses Action<(Of <(T>)>) delegate to print the contents of a List<(Of <(T>)>) object.
using System;//w w w . ja v a2 s. c o m
using System.Collections.Generic;
class Program
{
static void Main()
{
List<String> names = new List<String>();
names.Add("A");
names.Add("B");
names.Add("C");
names.Add("D");
names.ForEach(Print);
names.ForEach(delegate(String name)
{
Console.WriteLine(name);
});
}
private static void Print(string s)
{
Console.WriteLine(s);
}
}
The code above generates the following result.
Example 2
The following shows a compact Code for looping through the List with delegate.
using System;/* w w w .j a v a 2 s . c o m*/
using System.Collections.Generic;
class MainClass
{
static void Main()
{
List<int> x = new List<int>();
x.Add(5);
x.Add(10);
x.Add(15);
x.Add(20);
x.Add(25);
x.ForEach(delegate(int n) { Console.WriteLine(Math.Sqrt(n)); });
}
}
The code above generates the following result.
