我想记录所有异常服务器端。如何为WCF服务创建全局异常处理程序？
在ASP.NET中，我在Global.asax.cs中编写了类似这样的内容，但是这也适用于WCF服务吗？
public class Global : HttpApplication
{
protected void Application_Error(object sender, EventArgs e)
{
Exception unhandledException = Server.GetLastError();
//Log exception here
...
}
}
更新：我不想尝试...抓住我的.svc文件中的每个[OperationContract]。我简短...我想确保我的服务抛出的所有异常都由log4net记录。我不是在谈论客户端如何处理异常。
您可以通过执行IErrorHandler并将其与服务关联来创建WCF错误记录器;通常（对于日志记录），您将从HandleError（允许其他处理程序执行）返回false，并在HandleError（使用Exception）或ProvideFault（使用ref Message fault）中记录错误。
我通过编写自定义的行为（从BehaviorBase继承），这（在ApplyDispatchBehavior）增加了错误处理程序endpointDispatcher.ChannelDispatcher.ErrorHandlers应用此处理程序，如果它已不存在。
该行为可以通过配置应用。
我自己也经历了很多研究的开放标签，包括其他答案中链接的文章，这里正是某人需要的。
这里是的ErrorHandler类，你将需要......
Imports System.ServiceModel.Configuration
Imports System.ServiceModel.Description
Imports System.ServiceModel.Dispatcher
''' <summary>
''' This class defines a global ErrorHandler, that allows us to control the
''' fault message returned to the client and perform custom error processing
''' like logging.
''' </summary>
Public Class ErrorHandler
Implements IErrorHandler
''' <summary>
''' This method will be called whenever an exception occurs. Therefore,
''' we log it and then return false so the error can continue to propagate up the chain.
''' </summary>
''' <param name="ex">Exception being raised.</param>
''' <returns>False to let the error propagate up the chain, or True to stop the error here.</returns>
Public Function HandleError(ByVal ex As Exception) As Boolean Implements IErrorHandler.HandleError
'Unknown error occurred at the Service layer, log the event
logEvent("Encountered an unknown error at the Service layer.", ex, EventLogEntryType.Error)
Return False
End Function
''' <summary>
''' This method is optionally used to transform standard exceptions into custom
''' FaultException(Of TDetail) that can be passed back to the service client.
''' </summary>
''' <param name="ex">Exception being raised.</param>
''' <param name="version">SOAP version of the message.</param>
''' <param name="fault">Message object that is returned to the client.</param>
Public Sub ProvideFault(ByVal ex As Exception, ByVal version As Channels.MessageVersion, ByRef fault As Channels.Message) Implements IErrorHandler.ProvideFault
End Sub
End Class
''' <summary>
''' This class defines a ServiceBehavior, that will allow us to add our
''' custom ErrorHandler class, defined above, to each channel we have a
''' service running on.
''' </summary>
Public Class ErrorServiceBehavior
Implements IServiceBehavior
Public Sub AddBindingParameters(serviceDescription As ServiceDescription, serviceHostBase As ServiceHostBase, endpoints As ObjectModel.Collection(Of ServiceEndpoint), bindingParameters As Channels.BindingParameterCollection) Implements IServiceBehavior.AddBindingParameters
End Sub
Public Sub ApplyDispatchBehavior(serviceDescription As ServiceDescription, serviceHostBase As ServiceHostBase) Implements IServiceBehavior.ApplyDispatchBehavior
'Enumerate all channels and add the error handler to the collection
Dim handler As New ErrorHandler()
For Each dispatcher As ChannelDispatcher In serviceHostBase.ChannelDispatchers
dispatcher.ErrorHandlers.Add(handler)
Next
End Sub
Public Sub Validate(serviceDescription As ServiceDescription, serviceHostBase As ServiceHostBase) Implements IServiceBehavior.Validate
End Sub
End Class
''' <summary>
''' This class defines a BehaviorExtensionElement, so that we can
''' use the ErrorServiceBehavior class, defined above, in our App.config.
''' </summary>
Public Class ErrorHandlerBehavior
Inherits BehaviorExtensionElement
Protected Overrides Function CreateBehavior() As Object
Return New ErrorServiceBehavior()
End Function
Public Overrides ReadOnly Property BehaviorType As Type
Get
Return GetType(ErrorServiceBehavior)
End Get
End Property
End Class
然后，这些部分需要添加/更新您的服务项目App.config文件...
<system.serviceModel>
<extensions>
<behaviorExtensions>
<!-- Add in our custom error handler -->
<add name="ErrorLogging" type="Service.ErrorHandlerBehavior, Service, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
</behaviorExtensions>
</extensions>
<services>
<service name="Service.Service" behaviorConfiguration="Service.ServiceBehavior">
<endpoint address="" binding="wsHttpBinding" bindingConfiguration="wsHttp"
contract="SentinelService.IService"/>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="Service.ServiceBehavior">
<serviceMetadata httpGetEnabled="True" />
<serviceDebug includeExceptionDetailInFaults="False" />
<!-- Add in our custom error handler, from behaviorExtensions element -->
<ErrorLogging />
</behavior>
</serviceBehaviors>
</behaviors>
具体而言，需要添加behaviorExtension，其名称需要添加到行为部分，行为部分需要命名，并且该行为部分需要成为服务的behaviorConfiguration。
尽管行为延伸的“type”属性要小心，但它必须是确切的。如果您不确定，可以使用以下内容来确定它GetType(ErrorHandlerBehavior).AssemblyQualifiedName。
如果你有兴趣，这是我使用的LogEvent函数后面的代码...
''' <summary>
''' Logs a message and optional exception to the application event log.
''' </summary>
''' <param name="message">String message to log.</param>
''' <param name="ex">Exception to log.</param>
''' <param name="eventType">EventLogEntryType indicating the message severity.</param>
Public Sub logEvent(ByVal message As String, Optional ByVal ex As Exception = Nothing, _
Optional ByVal eventType As EventLogEntryType = EventLogEntryType.Information)
'Initialize report
Dim report As String = message + vbNewLine + vbNewLine
'Create eventLogger
Dim eventLogger As New EventLog()
'Register event source, add any Exception information to the report, and then log it
Try
'Register the app as an Event Source
If Not EventLog.SourceExists("MyAppName") Then
EventLog.CreateEventSource("MyAppName", "Application")
End If
If ex IsNot Nothing Then
'Force eventType to error
eventType = EventLogEntryType.Error
'Add Exception Information to report
report += "Exception Information:" + vbNewLine
Dim currentException As Exception = ex
Dim exCount As Integer = 1
While (currentException IsNot Nothing)
report += Space(5) + If(exCount = 1, "Message:", "Inner Exception:") + vbNewLine
report += Space(10) + currentException.Message + vbNewLine
report += Space(5) + "StackTrace:" + vbNewLine
report += Space(10) + currentException.StackTrace + vbNewLine
report += vbNewLine
currentException = currentException.InnerException
exCount += 1
End While
End If
Catch reportException As Exception
'This catch ensures that no matter what some error report is logged.
report += vbNewLine + vbNewLine + "PARTIAL REPORT!!!...AN ERROR WAS ENCOUNTERED GENERATING ERROR REPORT."
Finally
Try
'Log report
eventLogger.Source = "MyAppName"
eventLogger.WriteEntry(report, eventType)
Catch logEventException As Exception
'Eat it...nothing can be done at this point and we do
'not want the application to crash over an error report
'if we can prevent it
End Try
End Try
End Sub
这不是答案本身，而是的增编SkyBlade002提供的伟大答案，提供在C＃中给定的代码，为了方便对任何C＃编码器：
这里是我的代码（ErrorHandler.cs）：
/// <summary>
/// This class defines a global ErrorHandler, that allows us to control the fault message returned to the client and
/// perform custom error processing like logging.
/// </summary>
public class ErrorHandler : IErrorHandler {
private static readonly ILog Log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
/// <summary>
/// Enables the creation of a custom <see cref="T:System.ServiceModel.FaultException`1" /> that is returned from an
/// exception in the course of a service method.
/// </summary>
/// <remarks>
/// This method is optionally used to transform standard exceptions into custom FaultException(Of TDetail) that
/// can be passed back to the service client.
/// </remarks>
/// <param name="error">The <see cref="T:System.Exception" /> object thrown in the course of the service operation.</param>
/// <param name="version">The SOAP version of the message.</param>
/// <param name="fault">
/// The <see cref="T:System.ServiceModel.Channels.Message" /> object that is returned to the client, or
/// service, in the duplex case.
/// </param>
public void ProvideFault(Exception error, MessageVersion version, ref Message fault) {}
/// <summary>
/// This method will be called whenever an exception occurs. Therefore,
/// we log it and then return false so the error can continue to propagate up the chain.
/// </summary>
/// <param name="error">Exception being raised.</param>
/// <returns>False to let the error propagate up the chain, or True to stop the error here.</returns>
public bool HandleError(Exception error) {
Log.Error(ex); //TODO your own logging
return false;
}
这是我的代码（在ErrorHandlerBehavior.cs中）：
/// <summary>
/// This class defines a BehaviorExtensionElement, so that we can use the ErrorServiceBehavior class, defined above, in
/// our App.config.
/// </summary>
public class ErrorHandlerBehavior : BehaviorExtensionElement {
/// <summary>
/// Gets the type of behavior.
/// </summary>
public override Type BehaviorType {
get { return typeof (ErrorServiceBehavior); }
}
/// <summary>
/// Creates a behavior extension based on the current configuration settings.
/// </summary>
/// <returns>
/// The behavior extension.
/// </returns>
protected override object CreateBehavior() {
return new ErrorServiceBehavior();
}
}
这是我的代码（在ErrorServiceBehavior中。cs）：
/// <summary>
/// This class defines a ServiceBehavior, that will allow us to add our custom ErrorHandler class, defined above, to
/// each channel we have a service running on.
/// </summary>
public class ErrorServiceBehavior : IServiceBehavior {
/// <summary>
/// Provides the ability to inspect the service host and the service description to confirm that the service can run
/// successfully.
/// </summary>
/// <param name="serviceDescription">The service description.</param>
/// <param name="serviceHostBase">The service host that is currently being constructed.</param>
public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase) {}
/// <summary>
/// Provides the ability to pass custom data to binding elements to support the contract implementation.
/// </summary>
/// <param name="serviceDescription">The service description of the service.</param>
/// <param name="serviceHostBase">The host of the service.</param>
/// <param name="endpoints">The service endpoints.</param>
/// <param name="bindingParameters">Custom objects to which binding elements have access.</param>
public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters) {}
/// <summary>
/// Provides the ability to change run-time property values or insert custom extension objects such as error handlers,
/// message or parameter interceptors, security extensions, and other custom extension objects.
/// </summary>
/// <param name="serviceDescription">The service description.</param>
/// <param name="serviceHostBase">The host that is currently being built.</param>
public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase) {
//Enumerate all channels and add the error handler to the collection
var handler = new ErrorHandler();
foreach (ChannelDispatcher dispatcher in serviceHostBase.ChannelDispatchers) {
dispatcher.ErrorHandlers.Add(handler);
}
}
}
Good link;我会+1链接，如果我可以 – 2009-04-14 11:21:08
@LukasCenovsky +1链接只包含本质。 – pjvds 2012-05-09 13:06:00