this keyword in C#
In this article I will explain this keyword in C#.
Introduction
The this keyword
in c# refers to the current instance of the class. It can be used to
access members from within constructors, instance methods, and instance
accessors. Static constructors and member methods do not have
a this pointer
because they are not instantiated.
Example
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace
this_example
{
public class
Demo
{
string firstname;
string secondname;
public Demo(string
firstname, string secondname)
{
firstname =
firstname;
secondname =
secondname;
}
public void
Show()
{
Console.WriteLine("Your
firstname is :" + firstname);
Console.WriteLine("Your
secondname is : " + secondname);
}
}
class abc
{
static void
Main(string[] args)
{
string _firstname;
string _secondname;
Console.WriteLine("Enter
your firstname : ");
_firstname =
Console.ReadLine();
Console.WriteLine("Enter
your secondname : ");
_secondname =
Console.ReadLine();
Demo obj = new
Demo(_firstname, _secondname);
obj.Show();
Console.Read();
}
}
}
Output of the
above program will be
In this example
you are not getting any value. Because in the program the local data members
firstname
,
secondname
have precedence over instance members.
Using the this keyword
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace
this_example
{
public class
Demo
{
string firstname;
string secondname;
public Demo(string
firstname, string secondname)
{
this.firstname = firstname;
this.secondname = secondname;
}
public void
Show()
{
Console.WriteLine("Your
firstname is :" + firstname);
Console.WriteLine("Your
secondname is : " + secondname);
}
}
class abc
{
static void
Main(string[] args)
{
string _firstname;
string _secondname;
Console.WriteLine("Enter
your firstname : ");
_firstname =
Console.ReadLine();
Console.WriteLine("Enter
your secondname : ");
_secondname =
Console.ReadLine();
Demo
obj = new Demo(_firstname,
_secondname);
obj.Show();
Console.Read();
}
}
}
The output of the program
