can i define my own exception types in c#.net? if yes, how..?

Question

Example:

Is it possible to define my own exception type?

Consider i have my own custom method in code behind or BL or DA layer :

public void my_first_method()
{
  // some custom code execution..
  //might throw some errors..
}
//so.. if am not wrong..
//can i have something in my event handler like..

try
{

  my_first_method();
  my_second_method();
  my_third_method();

}
catch(my_first_methodException fex)
{

}
catch(my_second_methodException sex)
{

}
catch(my_third_methodException tex)
{

}
catch(Exception ex)
{
  //if doesn't belongs to above 3 exception come here..
}

I am trying to find out whether this is possible. Please advise. Thanks in advance.

I would probably rename the variable used to catch and handle the `my_second_methodException` type. Other than that, there's nothing wrong in defining your own exceptions by deriving from the `Exception` class. — Darin Dimitrov, Aug 23 '13 at 14:18
What have you tried? Search msdn.microsoft.com for custom exception .net http://msdn.microsoft.com/en-us/library/vstudio/ms229064(v=vs.100).aspx — paparazzo, Aug 23 '13 at 14:32

score 2 · Answer 1 · answered Aug 23 '13 at 14:18

2

Yes; just make a class that inherits Exception, and add appropriate constructors.

For more information, see MSDN.

For example:

[Serializable]
public class NewException : Exception
{
    public NewException() : base("Default message for this type") { }
    public NewException(string message) : base(message) { }
    public NewException(string message, Exception inner) : base(message, inner) { }

    // This constructor is needed for serialization.
   protected NewException(SerializationInfo info, StreamingContext context)
    : base(info, context) { }
}

answered Aug 23 '13 at 14:18

SLaks

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thanks, but how do you call this in your catch block, is it like "throw new NewException(ex.Message,?); what do you pass as a value to the second argument ? – Prathap S V Genny Aug 26 '13 at 06:14
@PrathapSVGenny: You should only psss an inner exception if you have one. (If you're adding more information inside a different `catch` block) – SLaks Aug 26 '13 at 13:31
@PrathapSVGenny: See http://stackoverflow.com/a/2999314/34397 – SLaks Aug 26 '13 at 13:34

score 0 · Answer 2 · answered Aug 23 '13 at 14:31

0

It's also worth mentioning that you can create an exception with the visual studio snippet. Just type 'exception' and tab and then name it and add any custom properties etc.

answered Aug 23 '13 at 14:31

devdigital

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can i define my own exception types in c#.net? if yes, how..?

2 Answers2