2. Basics

These are the basics for this design:

• You can create an intermediate class between System.Web.UI.Page and your web pages.

  • See TestWeb / App_Code / BasePage.cs

• In this class, you can override the function

  • protected override void OnError(EventArgs e)

• By this override, all unhandled errors will be processed

• This function initiates the chain processing the error

  protected override void OnError(EventArgs e)
  {
      if (ErrorProcessorChain.IsEnabled)
      {
          Exception realError = HttpContext.Current.Server.GetLastError();
          while ( null != realError.InnerException )
          {
              realError = realError.InnerException;
          }
          ErrorProcessorChain epc = ErrorProcessorChain.createErrorProcessorChain();
          epc.ProcessError(
              realError,
              epc.Source,
              HttpContext.Current.Request.CurrentExecutionFilePath.ToString());
          Server.ClearError();
      }
      else
      {
          base.OnError(e);
      }
  }