化零为整WCF(4) - 异常处理(Exception、FaultException、FaultException<T>、IEr
作者：webabcd
介绍
WCF(Windows Communication Foundation) - 异常处理：一般Exception的处理，FaultException和FaultException<T>的抛出和处理，使用IErrorHandler处理异常。
示例
1、服务
IHello.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;using System.ServiceModel;
namespace WCF.ServiceLib.Exception
{
/**//// <summary>
/// IHello接口
/// </summary>
[ServiceContract]
public interface IHello
{
/**//// <summary>
/// 抛出Exception异常
/// </summary>
[OperationContract]
void HelloException();/**//// <summary>
/// 抛出FaultException异常
/// </summary>
[OperationContract]
void HelloFaultException();/**//// <summary>
/// 抛出FaultException<T>异常
/// </summary>
[OperationContract]
[FaultContract(typeof(FaultMessage))]
void HelloFaultExceptionGeneric();/**//// <summary>
/// IErrorHandler处理异常
/// </summary>
[OperationContract]
void HelloIErrorHandler();
}
}
FaultMessage.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;using System.ServiceModel;
using System.Runtime.Serialization;namespace WCF.ServiceLib.Exception
{
/**//// <summary>
/// 错误信息实体类（用于错误契约FaultContract）
/// </summary>
[DataContract]
public class FaultMessage
{
/**//// <summary>
/// 错误信息
/// </summary>
[DataMember]
public string Message { get; set; }/**//// <summary>
/// 错误代码
/// </summary>
[DataMember]
public int ErrorCode { get; set; }
}
}
FaultErrorHandler.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;using System.ServiceModel.Dispatcher;
using System.Configuration;
using System.ServiceModel;
using System.ServiceModel.Channels;namespace WCF.ServiceLib.Exception
{
/**//// <summary>
/// 自定义错误处理器（继承自System.ServiceModel.Dispatcher.IErrorHandler）
/// </summary>
public class FaultErrorHandler : IErrorHandler
{
/**//// <summary>
/// 在异常返回给客户端之后被调用
/// </summary>
/// <param name="error">异常</param>
/// <returns></returns>
public bool HandleError(System.Exception error)
{
System.IO.StreamWriter sw = new System.IO.StreamWriter(@"C:WCF_Log.txt", true);
sw.Write("IErrorHandler - HandleError测试。错误类型：{0}；错误信息：{1}", error.GetType().ToString(), error.Message);
sw.WriteLine();
sw.Flush();
sw.Close();// true - 已处理
return true;
}/**//// <summary>
/// 在异常发生后，异常信息返回前被调用
/// </summary>
/// <param name="error">异常</param>
/// <param name="version">SOAP版本</param>
/// <param name="fault">返回给客户端的错误信息</param>
public void ProvideFault(System.Exception error, System.ServiceModel.Channels.MessageVersion version, ref System.ServiceModel.Channels.Message fault)
{
if (error is System.IO.IOException)
{
FaultException ex = new FaultException("IErrorHandler - ProvideFault测试");MessageFault mf = ex.CreateMessageFault();
fault = Message.CreateMessage(version, mf, ex.Action);
// InvalidOperationException error = new InvalidOperationException("An invalid operation has occurred.");
// MessageFault mfault = MessageFault.CreateFault(new FaultCode("Server", new FaultCode(String.Format("Server.{0}", error.GetType().Name))), new FaultReason(error.Message), error);
// FaultException fe = FaultException.CreateFault(mfault, typeof(InvalidOperationException));
}
}
}
}
Hello.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;using System.ServiceModel;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;namespace WCF.ServiceLib.Exception
{
/**//// <summary>
/// Hello类
/// </summary>
pub
补充：综合编程 , 其他综合 ,
