c# - 是否有可能捕获您无法处理的异常(在 C# 中)？

Question

我有一个捕获 T 异常的通用类:

    public abstract class ErrorHandlingOperationInterceptor<T> : OperationInterceptor where T : ApiException    {        private readonly Func<OperationResult> _resultFactory;        protected ErrorHandlingOperationInterceptor(Func<OperationResult> resultFactory)        {            _resultFactory = resultFactory;        }        public override Func<IEnumerable<OutputMember>> RewriteOperation(Func<IEnumerable<OutputMember>> operationBuilder)        {            return () =>            {                try                {                    return operationBuilder();                }                catch (T ex)                {                    var operationResult = _resultFactory();                    operationResult.ResponseResource = new ApiErrorResource { Exception = ex };                    return operationResult.AsOutput();                }            };        }    }

带有特定异常的子类，例如

    public class BadRequestOperationInterceptor : ErrorHandlingOperationInterceptor<BadRequestException>    {        public BadRequestOperationInterceptor() : base(() => new OperationResult.BadRequest()) { }    }

这一切似乎都很完美。但是，不知何故，在日志中(一次，而不是每次)是一个 InvalidCastException:

System.InvalidCastException: Unable to cast object of type 'ErrorHandling.Exceptions.ApiException' to type 'ErrorHandling.Exceptions.UnexpectedInternalServerErrorException'.   at OperationModel.Interceptors.ErrorHandlingOperationInterceptor`1.c__DisplayClass2.b__1() in c:\BuildAgent\work\da77ba20595a9d4\src\OperationModel\Interceptors\ErrorHandlingOperationInterceptor.cs:line 28

第 28 行是陷阱。

我错过了什么？我是不是做了什么蠢事？

Answer 1

正如史密斯所说，您的 T 是 ApiErrorResource 类型。你在你的代码中的某个地方试图创建你的 ErrorHandlingOperationInterceptor，它带有一个 Exception，它不是从 ApiErrorResource 派生的。

try
{
// throw Exception of some sort
}
catch (BadRequestException ex)
{
    BadRequestOperationInterceptor broi = new BadRequestOperationInterceptor ();
}
catch (Exception ex)
{
    // this is NOT right
    BadRequestOperationInterceptor broi = new BadRequestOperationInterceptor ();
}