当服务器通过webservice引发意外的异常时，抛出哪个.net异常 [英] Which .net exception to throw when the server throws an unexpected exception via webservice

问题描述

哪个.net异常应该抛出客户端（或更好地重新抛出），如果它从服务器捕获任何意外的异常（例如，通过WCF包装为FaultException，服务器可以在java上编写），以进一步处理它客户端如下：

Which .net exception should throw the client (or better re-throw), if it catches any unexpected exception from the server (e.g. wrapped in as FaultException via WCF, the server can be written on java) to handle it further on client as follow:

• 客户端向用户显示有关客户端/服务器中可能发生的错误的消息

<客户端向开发者提供此异常的详细信息（例如每个电子邮件）

业务层中的示例：

var client = new MyWcfClient());
try {
  // Try get data.
  var data = client.getSomeData(id);
  if(data == null) {
    // Unexpected exceptions from the server.
    // throw new Exception???
  }
} catch(FaultException<Specified1Exception> exception) {
  // Handle e.g. re-throw.
  // Shows the user the myErrorText.
  throw new InvalidOperationException(myErrorText)
} catch(FaultException<Specified2Exception> exception) {
  // Handle e.g. re-throw.
  // Enforce to show the user some dialog.
  throw new ArgumentException(param, myText);
} catch(FaultException exception) {
  // Unexpected exceptions from the server.
  // throw new UnexpectedServerException???
} catch(Exception exception) {
  // WCF error, like communication timeout, soap etc.
  throw new InvalidOperationException(myOtherErrorText);
}

提供.net框架（本例中为UnexpectedServerException）的任何异常，if不，您会创建哪个异常？

Provides the .net framework any exceptions for (UnexpectedServerException in this example), if not, which exception would you create?

推荐答案

以下示例显示了WCF客户端的常见异常处理：

The following example shows the usual exception handling for WCF clients:

try
{
    ... // service call
}
catch (FaultException<X> e)
{
    // handle fault specified as [FaultContract(typeof(X))]
}
catch (FaultException<Y> e)
{
    // handle fault specified as [FaultContract(typeof(Y))]
}
catch (FaultException e)
{
    // handle all other faults NOT specified as [FaultContract]
    // these are unhandled exception thrown by the service
}
catch (CommunicationException e)
{
    // handle all communication-layer exceptions
    // these are exceptions thrown by the WCF infrastucture
}

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