ExceptionHandler.HandleException(Exception) Metod

Definition

Namnområde:
System.ServiceModel.Dispatcher
Sammansättning:
System.ServiceModel.dll

När det åsidosättas i en härledd klass returneras true om undantaget har hanterats, eller false om undantaget ska förnyas och programmet avslutas.

public:
 abstract bool HandleException(Exception ^ exception);
public abstract bool HandleException(Exception exception);
abstract member HandleException : Exception -> bool
Public MustOverride Function HandleException (exception As Exception) As Boolean

Parametrar

exception
Exception

Undantaget som inträffade inom Windows Communication Foundation(WCF) körning och som kan avsluta programmet.

Returer

Boolean

trueom undantaget har hanterats. annars . false

Exempel

I följande kodexempel visas en implementering av den ExceptionHandler abstrakta klass som åsidosätter HandleException metoden.

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

I följande kodexempel visas hur du aktiverar anpassad MyExceptionHandler för ohanterade undantag som inträffar inom WCF-körningen.

// 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

Kommentarer

Metoden HandleException(Exception) returnerar true om undantaget har hanterats. Om det returnerar false eller utlöser ett annat undantag, är det ursprungliga undantaget återväxt.

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