ExceptionHandler Class

Definition

Namespace:

System.ServiceModel.Dispatcher

Assembly:

System.ServiceModel.dll

Extend the ExceptionHandler class to create an exception handler for unhandled exceptions that occur within the Windows Communication Foundation (WCF) runtime.

public ref class ExceptionHandler abstract

public abstract class ExceptionHandler

type ExceptionHandler = class

Public MustInherit Class ExceptionHandler

Inheritance

Object

ExceptionHandler

Examples

The following code example shows an implementation of the ExceptionHandler abstract class that overrides the HandleException method.

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

The following code example shows how to enable the custom MyExceptionHandler for unhandled exceptions that occur within the WCF runtime.

    static void Main(string[] args)
    {
        // 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

Remarks

Extend the ExceptionHandler class and override the HandleException method to determine whether an exception should terminate the application. Then create a new instance of your custom ExceptionHandler class and assign it to the static AsynchronousThreadExceptionHandler or TransportExceptionHandler property prior to creating WCF clients or services.

Constructors

ExceptionHandler()

Initializes a new instance of the ExceptionHandler class.

Properties

AlwaysHandle	Gets an instance of ExceptionHandler that handles all exceptions.
AsynchronousThreadExceptionHandler	Gets or sets the current ExceptionHandler implementation for the application domain.
TransportExceptionHandler	Gets or sets the current transport ExceptionHandler implementation for the application domain.

Methods

Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
HandleException(Exception)	When overridden in a derived class, returns true if the exception has been handled, or false if the exception should be rethrown and the application terminated.
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)