Description
In C#, there are many instances where errors occuring in programming but in few exceptional cases some errors might not be caught this situation is called as Exceptions. To control this exception a technique called Exception Handling is used.
C# Exception Handling uses the
try, catch, and finally keywords to attempt actions that may not succeed, to handle failures and to clean up resources afterwards. Exceptions
- System.SystemException class is the base class for all predefined system exception.
- try block is where code is written which can throw an exception.Single try can have multiple catch Object.
- Catch block is use to handle the exception thrown from try block.
- Finally block is used to execute statement, which need to execute compulsory whether exception occurs or not.
- Throws keyword catch exception when program throw an exception.
Conceptual
figure
Syntax
try
{
//Code Here
}
Catch
{
//Code Here
}
Finally
{
//Code Here
}
Example
[csharp]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace SPLessons
{
class Program
{
static void Main(string[] args)
{
try
{
Console.WriteLine("Welcome to SPLessons Calculator");
int a=1,b=0,c=0;
c=a/b;
Console.WriteLine("Divide:"+c);
}
catch(DivideByZeroException d)
{
Console.WriteLine(d.Message);
}
catch(Exception e)
{
Console.WriteLine(e.Message);
}
finally
{
Console.WriteLine("Thank you for using SPLessons");
}
}
}
[/csharp]
Output:
