ExceptionHandler Classe

Definizione

public ref class ExceptionHandler abstract

public abstract class ExceptionHandler

type ExceptionHandler = class

Public MustInherit Class ExceptionHandler

Ereditarietà

Object

ExceptionHandler

Esempio

Nell'esempio di codice seguente viene illustrata un'implementazione della ExceptionHandler classe astratta che esegue l'override del HandleException metodo .

using System;
using System.ServiceModel.Dispatcher;

namespace CS
{
    public class MyExceptionHandler : ExceptionHandler
    {
        // HandleException method override gives control to
        // your code.
        public override bool HandleException(Exception ex)
        {
            // This method contains logic to decide whether
            // the exception is serious enough
            // to terminate the process.
            return ShouldTerminateProcess(ex);
        }

        public bool ShouldTerminateProcess(Exception ex)
        {
            // Write your logic here.
            return true;
        }
    }

Imports System.ServiceModel.Dispatcher

Namespace CS
    Public Class MyExceptionHandler
        Inherits ExceptionHandler
            ' HandleException method override gives control to 
            ' your code.
            Public Overrides Function HandleException(ByVal ex As Exception) As Boolean
                ' This method contains logic to decide whether 
                ' the exception is serious enough
                ' to terminate the process.
                Return ShouldTerminateProcess (ex)
            End Function

            Public Function ShouldTerminateProcess(ByVal ex As Exception) As Boolean
                ' Write your logic here.
                Return True
            End Function
    End Class

Nell'esempio di codice seguente viene illustrato come abilitare l'oggetto personalizzato MyExceptionHandler per le eccezioni non gestite che si verificano all'interno del runtime WCF.

// Create an instance of the MyExceptionHandler class.
MyExceptionHandler thisExceptionHandler =
    new MyExceptionHandler();

// Enable the custom handler by setting
//   AsynchronousThreadExceptionHandler property
//   to this object.
ExceptionHandler.AsynchronousThreadExceptionHandler =
    thisExceptionHandler;

// After the handler is set, write your call to
// System.ServiceModel.ICommunication.Open here.

    Sub Main(ByVal args() As String)
        ' Create an instance of the MyExceptionHandler class.
        Dim thisExceptionHandler As New MyExceptionHandler()

        ' Enable the custom handler by setting 
        '   AsynchronousThreadExceptionHandler property
        '   to this object.
        ExceptionHandler.AsynchronousThreadExceptionHandler = thisExceptionHandler

        ' After the handler is set, write your call to 
        ' System.ServiceModel.ICommunication.Open here
    End Sub
End Module

Commenti

Estendere la classe ed eseguire l'override ExceptionHandler del HandleException metodo per determinare se un'eccezione deve terminare l'applicazione. Creare quindi una nuova istanza della classe personalizzata ExceptionHandler e assegnarla alla proprietà o TransportExceptionHandler statica AsynchronousThreadExceptionHandler prima di creare client o servizi WCF.