Errors in a business layer

bmains · February 10th, 2005, 11:59 AM

Hello,

I'm developing an n-tier system, with a presentation layer (ASP.NET site), business layer (class library), data layer (class library), and security layer (class library).

I was curious if anybody had any ideas regarding errors in the business layer. I have try catch blocks for catching errors in the business layer, but am not sure quite how to handle getting the error back to the user interface. I don't want to get into a habit of throwing errors due to performance, so I was curious if anybody had any implementations that they would like to share.

Thanks,

Brian

mehdi62b · February 11th, 2005, 02:27 PM

Hi Brian,
I think you can make an event in your inner layers and use them in outer layers, for example you can have an public event like ErrorNotify,

Code:

try
{
}
catch(Exception oException)
{
  //do some other stuff
  //execute the event(call its method)
  //and send the exception inside your own EventArgs
}

then in your ASP.NET layer(the next layer) you can use this event like

Code:

BLobject.ErrorNotify+=new ErrorNotifyHandller(ErrorOccured)
//then in your ErrorOccured method you can 
//redirect users to ErrorPage.aspx

also you can make your own EventArgs and ErrorNotifyHandller delegate in another assembly then in your ASP.NET page you would receive your ownEvenetArgs as a parameter of your ErrorNotifyHandller delegate.

_____________
Mehdi.
software student.