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

}