2. Disclaimer: This presentation is prepared by trainees of
baabtra as a part of mentoring program. This is not official
document of baabtra –Mentoring Partner
Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt .
Ltd

3. Week Target Achieved
1 30 23
2 30 26
3 30 25
Typing Speed

4. Jobs Applied
Week Company Designation Applied Date Current Status
1
2
3

5. Error Handling in Asp .net
MuhammedAjaml
mhdajmalik@gmail.com
www.facebook.com/ajuik
twitter.com/username
in.linkedin.com/in/profilename
9745020951

6. Exception
• Exceptions are unforeseen errors that happen within
the logic of an application.
– File not found
– Unautherised access
– Argument NullException
– Arithmetic Exception

7. Unhandled exception
• When an exception occurs and if it is not handled.

8. Unhandled exception
• An unhandled exception is displayed to the user using
an”yellow screen of death”

9. Disadvantage of yellow screen of
death
. The error messages are cryptic and may not make any
sense to the end user
. The exception information may be useful for a hacker,
to hack into your application

10. Exception handling using - try-
catch
Try
{
Wrap the code in a try block that could possibly cause an
exception
}
Catch(Exception e)
{//handle errors}
Finally
{//Used to free resources.}

11. Example
• A program to read data from XML file and display it
to the Grid View

12. Countries.xml

13. Bind to gridview

14. Show Data

15. File not found Exception

16. Error

17. Try –catch-finally

18. Show Error

19. Unauthorised Exception

20. Show Error

21. Asp .net Error Events
• Page_Error
– Used in page level
– This event raised whenever an unhandled exception occurs
in the page.
• Application_Error
– Used in application level
– This event raised whenever an unhandled exception occurs
in the application.

22. Page_Error Example

23. Yellow screen death

24. Page_error

25. Errors.aspx

26. Application_Error
• When there is an unhandled exception at an
application level.
• The event handler resides in Global.asax file

27. Contd..

28. Thank You

29. If this presentation helped you, please visit our
page facebook.com/baabtra and like it.
Thanks in advance.
www.baabtra.com | www.massbaab.com |www.baabte.com

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