Exception Handling in C#

When we develope of an application,there are 2 type of error occoured in the Program.

1)Compile Time Error

2)Run Time Error

1) Compile Time Error: 

                               The error that come into picture due to syntatical mistake this error is called as Compile Time error.These type of error can not take seriously because that error can not effect on your Program.

2) Run Time Error :

                          Runtime Error come into picture in the Middle of the program Execuation,due to Various Reason like Wrong implementation of logic,or wrong input supply to the program,and Missing Required Resources.

                 These  type of error can take seriously because  these error directly affect on program.

Exception Class:

                 “Exception class”  is  Responsible for abnormal termination of program whenever runtime error occour in program.

                     Object of this exception class will take Responsible of abnormal termination after abnormal termination they will also display error Message to stating reason of the termination.

Type of Exception:-

                          There are 2 type of exception

1)System Exception.

2)Application Exception.

 System Exception:-

                           Exception that gets raised implictly of some predefind Condition is an  “System Exception”.

Eg.DivideByZeroException,FormatException,OverFlowException,NullReference Exception

Application  Exception:-

                           Exception that gets raised explictly by the programmerin the application on own condition is an  “Application Exception”.

        It can also reffered as “User Defind Exception”

How to Handle Exception:

                                      When abnormal termination occour in the program  then remaining code of the program cannot get execuated.if we want to handle these exception we need to first   stop abnormal termination and take corrective action to resolve these problem.

Syntax:

         The following syntax can used for handling exception.

Try

{

//statement which causes rruntime error

}

Catch( <Exception> <var>)

{

//statement which execute only when runtime error occour

}

Demo:-

1)      Open visual studio 2012.

2)      Select file -> New ->Project         

3)      Select language as “visual c#” and  template as “Console Application”,give appropritate name,I give name as ExceptionDemo.select Location as click on ok

4)by default name of the class is program.cs Rename it Demo.cs. by right click on program .cs and choose rename give name as Demo .after they will ask conformation click ok.

5)Write the following code 

7) Save the program and executie using f5.

If we provide y value as 0 then  DivideByZeroException will occour and error will be handle and display user friendly Message.

In the following output if we provide the non numeric value then these exception will be handled by FormatException and show the user Friendly Error Message.

   On that way we can handle abnormal termination.

Hope u enjoy my article.

For more article visit my blog

http://dotnetbyabhipatil.blogspot.in/