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Posted 25 Jul 2011

ForEach Method for the Collections

, 25 Jul 2011
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ForEach method for the collections

In this small post, I am going to discuss about the new method introduced in the .NET Framework ForEach which allows to perform the action on each set of element.

Syntax:

public void ForEach(Action<t> action)

Action<t> is delegate or function to perform on each element of the List.

To get into more details about how it works, check the following code.

Below is the Employee class which has property related to employee of the company.

public class Employee
{
        public string Name { get; set; }
        public int Salary { get; set; }
        public string Address { get; set; }
        public int Id { get; set; }
}

and now in the following line of code, I am initializing list of employees.

class Program
    {
        static void Main(string[] args)
        {
          List<employee> emplst = new List<employee> { 
          new Employee() { Name="pranay", Address = "Ahmedabad", Id=1, Salary=1234},
          new Employee() { Name="Hemang", Address = "Ahmedabad", Id=2, Salary=2348},
          new Employee() { Name="kurnal", Address = "Himmatnagar", Id=3, Salary=8999},
          new Employee() { Name="Hanika", Address = "Ahmedabad", Id=4, Salary=7888}
        };

Now I want to increase salary of each employee by 10%, so with the help of new ForEach construct, I can easily achieve it by using the following line of code.

emplst.ForEach(new Program().incSalary);
     }

  private void incSalary(Employee emp)
  {
     emp.Salary += (emp.Salary * 10)/100; 
  }
}

As you can see in the above code, I have written new Program().incSalary as action, in the incsalary method as you see, I increase the salary of each employee by 10%.

This thing can easily also be done by making use of the foreach loop available but if you see the ForEach in reflector, it does the same thing.

ForEach method makes code more simple and easy to understand.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Pranay Rana
Software Developer (Senior) GMind Solusion
India India

Microsoft C# MVP (12-13)



Hey, I am Pranay Rana, working as a ITA in MNC. Web development in Asp.Net with C# and MS sql server are the experience tools that I have had for the past 5.5 years now.

For me def. of programming is : Programming is something that you do once and that get used by multiple for many years

You can visit my blog


StackOverFlow - http://stackoverflow.com/users/314488/pranay
My CV :- http://careers.stackoverflow.com/pranayamr

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Comments and Discussions

 
QuestionWhy use the additional method? Pin
Michael Lee Yohe27-Jul-11 11:42
memberMichael Lee Yohe27-Jul-11 11:42 
AnswerRe: Why use the additional method? Pin
Pranay Rana27-Jul-11 20:09
memberPranay Rana27-Jul-11 20:09 

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