Typecasting

Author: Suresh Konjerla.

In this article I am going to explain the concept of type casting. Typecasting is concept of converting data from one data type to another data type. C# supports 2 types of type Casting. Those are

1)      Implicit Type Casting

2)      Explicit Type Casting    

 

C# supports 4 types of Type casting techniques

1)      C++ style of typecasting

2)      Converting

3)      Parsing

4)      Boxing and UnBoxing

Now I am going to explain 1 & 2 types of Type casting techniques here

1)    C++ Style of typecasting :

Syntax:  datatype1 var1 = value;

Datatype2 var2 = (Datatype2) var1;

     Example program:

2)    Converting  :

     Converting is used to type cast data from any data type to another data type.

Working with predefined class called Convert is Converting. Convert Class collection of static methods used for type casting. Those are

      ToByte(value)     : used to convert data  into Byte data type

      ToString(value )  : used to convert data into String data type

      ToBoolean(value): used to convert data into Boolean data type

      ToChar(value)     : used to convert data into char data type

      ToInt32(value)    : used to convert data into integer data type

     To Double(value) : used to convert data into Double data type

          

Example:

    double d = 10.1;

   int x = Convert.ToInt32(d);  // returns 10

   string s = Convert.ToString(d);  //returns 10

   Boolean b = Convert.ToBoolean(d);  //return True

   Byte bt = Convert.ToByte(d); //return 10

The following Program to convert integer values from 0 to 255 into characters

  

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Typecasting1

{

    class ExConverting

    {

        static void Main(string[] args)

        {

            for (int i = 0; i <= 255; i++)

            {

                char c = Convert.ToChar(i);

                Console.Write(c);

                Console.Write(" ");

            }

            Console.ReadKey();

        }

    }

}

Output :