这是什么?

这是CW版本的接受的答案，但与(我认为完整的)异常处理包括在内。

公认的答案引用了这个已经不复存在的网站。为了省事，我在这里列出了最相关的部分。此外，我对它进行了轻微修改，以包括异常重试处理，以处理那些讨厌的网络超时。

简单的WCF客户端使用

生成客户端代理后，这就是实现它所需要的全部内容。

Service<IOrderService>.Use(orderService=>
{
  orderService.PlaceOrder(request);
});

ServiceDelegate.cs

将此文件添加到解决方案中。不需要对该文件进行任何更改，除非您想更改重试次数或想要处理的异常。

public delegate void UseServiceDelegate<T>(T proxy);

public static class Service<T>
{
    public static ChannelFactory<T> _channelFactory = new ChannelFactory<T>(""); 

    public static void Use(UseServiceDelegate<T> codeBlock)
    {
        IClientChannel proxy = (IClientChannel)_channelFactory.CreateChannel();
        bool success = false;


       Exception mostRecentEx = null;
       int millsecondsToSleep = 1000;

       for(int i=0; i<5; i++)  // Attempt a maximum of 5 times 
       {
           try
           {
               codeBlock((T)proxy);
               proxy.Close();
               success = true; 
               break;
           }

           // The following is typically thrown on the client when a channel is terminated due to the server closing the connection.
           catch (ChannelTerminatedException cte)
           {
              mostRecentEx = cte;
               proxy.Abort();
               //  delay (backoff) and retry 
               Thread.Sleep(millsecondsToSleep  * (i + 1)); 
           }

           // The following is thrown when a remote endpoint could not be found or reached.  The endpoint may not be found or 
           // reachable because the remote endpoint is down, the remote endpoint is unreachable, or because the remote network is unreachable.
           catch (EndpointNotFoundException enfe)
           {
              mostRecentEx = enfe;
               proxy.Abort();
               //  delay (backoff) and retry 
               Thread.Sleep(millsecondsToSleep * (i + 1)); 
           }

           // The following exception that is thrown when a server is too busy to accept a message.
           catch (ServerTooBusyException stbe)
           {
              mostRecentEx = stbe;
               proxy.Abort();

               //  delay (backoff) and retry 
               Thread.Sleep(millsecondsToSleep * (i + 1)); 
           }
           catch (TimeoutException timeoutEx)
           {
               mostRecentEx = timeoutEx;
               proxy.Abort();

               //  delay (backoff) and retry 
               Thread.Sleep(millsecondsToSleep * (i + 1)); 
           } 
           catch (CommunicationException comException)
           {
               mostRecentEx = comException;
               proxy.Abort();

               //  delay (backoff) and retry 
               Thread.Sleep(millsecondsToSleep * (i + 1)); 
           }
           catch(Exception )
           {
                // rethrow any other exception not defined here
                // You may want to define a custom Exception class to pass information such as failure count, and failure type
                proxy.Abort();
                throw ;  
           }
       }
       if (success == false && mostRecentEx != null) 
       { 
           proxy.Abort();
           throw new Exception("WCF call failed after 5 retries.", mostRecentEx );
       }

    }
}

PS:我把这篇文章做成了一个社区维基。我不会从这个答案中收集“分数”，但如果你同意这个实现，或者编辑它使它更好，我更希望你给它投票。

您还可以使用DynamicProxy来扩展Dispose()方法。你可以这样做:

using (var wrapperdProxy = new Proxy<yourProxy>())
{
   // Do whatever and dispose of Proxy<yourProxy> will be called and work properly.
}

对于使用ServiceClient而不是ChannelFactory的情况，我想从Marc Gravell的答案中添加服务的实现。

public interface IServiceConnector<out TServiceInterface>
{
    void Connect(Action<TServiceInterface> clientUsage);
    TResult Connect<TResult>(Func<TServiceInterface, TResult> channelUsage);
}

internal class ServiceConnector<TService, TServiceInterface> : IServiceConnector<TServiceInterface>
    where TServiceInterface : class where TService : ClientBase<TServiceInterface>, TServiceInterface, new()
{
    public TResult Connect<TResult>(Func<TServiceInterface, TResult> channelUsage)
    {
        var result = default(TResult);
        Connect(channel =>
        {
            result = channelUsage(channel);
        });
        return result;
    }

    public void Connect(Action<TServiceInterface> clientUsage)
    {
        if (clientUsage == null)
        {
            throw new ArgumentNullException("clientUsage");
        }
        var isChanneldClosed = false;
        var client = new TService();
        try
        {
            clientUsage(client);
            client.Close();
            isChanneldClosed = true;
        }
        finally
        {
            if (!isChanneldClosed)
            {
                client.Abort();
            }
        }
    }
}

我写了一个高阶函数来让它正确工作。我们已经在几个项目中使用了这个方法，看起来效果不错。这就是从一开始就应该做的事情，没有“使用”范式等等。

TReturn UseService<TChannel, TReturn>(Func<TChannel, TReturn> code)
{
    var chanFactory = GetCachedFactory<TChannel>();
    TChannel channel = chanFactory.CreateChannel();
    bool error = true;
    try {
        TReturn result = code(channel);
        ((IClientChannel)channel).Close();
        error = false;
        return result;
    }
    finally {
        if (error) {
            ((IClientChannel)channel).Abort();
        }
    }
}

你可以这样打电话:

int a = 1;
int b = 2;
int sum = UseService((ICalculator calc) => calc.Add(a, b));
Console.WriteLine(sum);

这和你的例子很像。在一些项目中，我们编写强类型的帮助器方法，因此我们最终会写出类似“Wcf.UseFooService(f=>f…)”这样的东西。

从各方面考虑，我觉得它相当优雅。您遇到过什么特别的问题吗?

这允许插入其他漂亮的功能。例如，在一个站点上，站点代表登录用户向服务进行身份验证。(该网站本身没有凭据。)通过编写我们自己的“UseService”方法助手，我们可以按照我们想要的方式配置通道工厂，等等。我们也不局限于使用生成的代理——任何接口都可以。

我终于找到了一些明确解决这个问题的坚实步骤。

This custom tool extends WCFProxyGenerator to provide an exception handling proxy. It generates an additional proxy called ExceptionHandlingProxy<T> which inherits ExceptionHandlingProxyBase<T> - the latter of which implements the meat of the proxy's functionality. The result is that you can choose to use the default proxy that inherits ClientBase<T> or ExceptionHandlingProxy<T> which encapsulates managing the lifetime of the channel factory and channel. ExceptionHandlingProxy respects your selections in the Add Service Reference dialog with respect to asynchronous methods and collection types.

Codeplex有一个名为异常处理WCF代理生成器的项目。它基本上是在Visual Studio 2008中安装一个新的自定义工具，然后使用该工具生成新的服务代理(添加服务引用)。它有一些很好的功能来处理故障通道、超时和安全处理。这里有一个名为ExceptionHandlingProxyWrapper的优秀视频，详细解释了这是如何工作的。

您可以安全地再次使用Using语句，如果通道在任何请求(TimeoutException或CommunicationException)上发生故障，Wrapper将重新初始化故障通道并重试查询。如果失败，它将调用Abort()命令并处理代理并重新抛出异常。如果服务抛出FaultException代码，它将停止执行，代理将按照预期安全抛出正确的异常。

下面的帮助器允许调用void和非void方法。用法:

var calculator = new WcfInvoker<CalculatorClient>(() => new CalculatorClient());
var sum = calculator.Invoke(c => c.Sum(42, 42));
calculator.Invoke(c => c.RebootComputer());

类本身是:

public class WcfInvoker<TService>
    where TService : ICommunicationObject
{
    readonly Func<TService> _clientFactory;

    public WcfInvoker(Func<TService> clientFactory)
    {
        _clientFactory = clientFactory;
    }

    public T Invoke<T>(Func<TService, T> action)
    {
        var client = _clientFactory();
        try
        {
            var result = action(client);
            client.Close();
            return result;
        }
        catch
        {
            client.Abort();
            throw;
        }
    }

    public void Invoke(Action<TService> action)
    {
        Invoke<object>(client =>
        {
            action(client);
            return null;
        });
    }
}