C# this
In c# programming, this is a keyword that refers to the current instance of the class. There can be 3 main usage of this keyword in C#.
- It can be used to refer current class instance variable. It is used if field names (instance variables) and parameter names are same, that is why both can be distinguish easily.
- It can be used to pass current object as a parameter to another method.
- It can be used to declare indexers.
C# this example
Let's see the example of this keyword in C# that refers to the fields of current class.
using System;
public class Employee
{
public int id;
public String name;
public float salary;
public Employee(int id, String name,float salary)
{
this.id = id;
this.name = name;
this.salary = salary;
}
public void display()
{
Console.WriteLine(id + " " + name+" "+salary);
}
}
class TestEmployee{
public static void Main(string[] args)
{
Employee e1 = new Employee(101, "Nagesh", 890000f);
Employee e2 = new Employee(102, "Animesh", 490000f);
e1.display();
e2.display();
}
}
public class Employee
{
public int id;
public String name;
public float salary;
public Employee(int id, String name,float salary)
{
this.id = id;
this.name = name;
this.salary = salary;
}
public void display()
{
Console.WriteLine(id + " " + name+" "+salary);
}
}
class TestEmployee{
public static void Main(string[] args)
{
Employee e1 = new Employee(101, "Nagesh", 890000f);
Employee e2 = new Employee(102, "Animesh", 490000f);
e1.display();
e2.display();
}
}
Output:
101 Sonoo 890000
102 Mahesh 490000
We will learn about other usage of this keyword in next chapters.
