我想使用企业库异常处理块进行异常处理。为了尝试它,我编写了一个简单的应用程序来抛出和处理异常,在使用它时我遇到了以下问题:
当我使用 BCL 异常System.ApplicationException
时,抛出的异常会按应有的方式包装:
政策:
<exceptionPolicies>
<add name="DalPolicy">
<exceptionTypes>
<add name="DbPrimitiveHandledException" type="Exceptions.DbPrimitiveHandledException, Exceptions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"
postHandlingAction="ThrowNewException">
<exceptionHandlers>
<add name="DAL Wrap Handler" type="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.WrapHandler, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
exceptionMessage="Dal Wrapper Exception" wrapExceptionType="System.ApplicationException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
</exceptionHandlers>
</add>
</exceptionTypes>
</add>
...
</exceptionPolicies>
控制台输出:
System.ApplicationException: Dal Wrapper Exception ---> Exceptions.DbPrimitiveHandledException: Db Handled Policed exception...
但是当我尝试使用自己的异常时:
public class DalWrapperException : Exception
{
public DalWrapperException()
{ }
public DalWrapperException(string message)
: base(message)
{ }
}
政策:
<exceptionPolicies>
<add name="DalPolicy">
<exceptionTypes>
<add name="DbPrimitiveHandledException" type="Exceptions.DbPrimitiveHandledException, Exceptions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"
postHandlingAction="ThrowNewException">
<exceptionHandlers>
<add name="DAL Wrap Handler" type="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.WrapHandler, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
exceptionMessage="Dal Wrapper Exception" wrapExceptionType="Exceptions.DalWrapperException, Exceptions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
</exceptionHandlers>
</add>
</exceptionTypes>
</add>
...
</exceptionPolicies>
包装不起作用 - 我得到一个 ExceptionHandlingException:
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.ExceptionHandlingException: Unable to handle exception: 'WrapHandler'.
谁能告诉我我的异常或配置有什么问题?提前致谢