WCF服务全局统一异常处理机制

转载：http://www.csframework.com/archive/1/arc-1-20150109-2193.htm

服务端增加WCF服务全局异常处理机制，任一WCF服务或接口方式出现异常，将统一调用WCF_ExceptionHandler.ProvideFault方法，因此不需要每个方法使用try catch写法。

C# Code:

/// <summary> 
/// WCF服务端异常处理器 
/// </summary> 
public class WCF_ExceptionHandler : IErrorHandler
{
   #region IErrorHandler Members
   
   /// <summary> 
   /// HandleError 
   /// </summary> 
   /// <param name="ex">ex</param> 
   /// <returns>true</returns> 
   public bool HandleError(Exception ex)
   {
      return true;
   }
   
   /// <summary> 
   /// ProvideFault 
   /// </summary> 
   /// <param name="ex">ex</param> 
   /// <param name="version">version</param> 
   /// <param name="msg">msg</param> 
   public void ProvideFault(Exception ex, MessageVersion version, ref Message msg)
   {
      // 
      //在这里处理服务端的消息，将消息写入服务端的日志 
      // 
      string err = string.Format("调用WCF接口 '{0}' 出错", ex.TargetSite.Name) "，详情：\r\n" ex.Message;
      var newEx = new FaultException(err);
      
      MessageFault msgFault = newEx.CreateMessageFault();
      msg = Message.CreateMessage(version, msgFault, newEx.Action);
   }
   
   #endregion
}

//来源:C/S框架网(www.csframework.com) QQ:1980854898

C# Code:

/// <summary> 
/// WCF服务类的特性 
/// </summary> 
public class WCF_ExceptionBehaviourAttribute : Attribute, IServiceBehavior
{
   private readonly Type _errorHandlerType;
   
   public WCF_ExceptionBehaviourAttribute(Type errorHandlerType)
   {
      _errorHandlerType = errorHandlerType;
   }
   
   #region IServiceBehavior Members
   
   public void Validate(ServiceDescription description,
   ServiceHostBase serviceHostBase)
   {
   }
   
   public void AddBindingParameters(ServiceDescription description,
   ServiceHostBase serviceHostBase,
   Collection<ServiceEndpoint> endpoints,
   BindingParameterCollection parameters)
   {
   }
   
   public void ApplyDispatchBehavior(ServiceDescription description,
   ServiceHostBase serviceHostBase)
   {
      var handler =
      (IErrorHandler)Activator.CreateInstance(_errorHandlerType);
      
      foreach (ChannelDispatcherBase dispatcherBase in
      serviceHostBase.ChannelDispatchers)
      {
         var channelDispatcher = dispatcherBase as ChannelDispatcher;
         if (channelDispatcher != null)
         channelDispatcher.ErrorHandlers.Add(handler);
      }
   }
   
   #endregion
}

//来源:C/S框架网(www.csframework.com) QQ:1980854898

使用：

C# Code:

[ServiceBehavior(IncludeExceptionDetailInFaults = true)]
[WCF_ExceptionBehaviour(typeof(WCF_ExceptionHandler))]
public class AccountModuleService : IAccountModuleService
{
   
   //来源:C/S框架网(www.csframework.com) QQ:1980854898

}