调用的目标（MethodBase.Invoke方法）已引发异常 [英] Exception has been thrown by the target of an invocation (MethodBase.Invoke Method)

问题描述

我想捕获在用invoke方法调用的方法中引发的异常。

I want to catch the exceptions that are thrown in methods called with invoke method.

public void TestMethod()
{
   try     
   {
       method.Invoke(commandHandler, new[] { newCommand });
   }
   catch(Exception e)
   {     
       ExceptionService.SendException(e);
   }
}

方法。调用调用以下方法：

method.Invoke calls the following method:

public void Register(/*parameters*/)
{
     if(test_condition())
          throw new CustomException("Exception Message");
}

问题是当我在CustomMethod中捕获CustomException时，e catch语句上的变量的类型不是CustomException。它具有以下消息：调用的目标已引发异常。

The problem is that when I catch the CustomException, in the TestMethod, the e variable on the catch statement has NOT the type CustomException. It has the following message: "Exception has been thrown by the target of an invocation".

我想捕获已引发的异常（这是CustomException），并将其传递给ExceptionService机制。

I want to catch the exception that has been raised (which is CustomException), and pass it to the ExceptionService mechanism.

我在做什么错了？

推荐答案

是的，你是通过反射重新调用该方法。因此，根据文档，< a href = https://msdn.microsoft.com/zh-cn/library/system.reflection.targetinvocationexception(v=vs.110).aspx rel = noreferrer> TargetInvocationException 。

Yes, you're calling the method via reflection. So as per the documentation, a TargetInvocationException will be thrown if the target method throws an exception.

只需使用 InnerException 属性

Just use the InnerException property to obtain - and potentially throw - the original exception.

因此，例如：

try     
{
    method.Invoke(commandHandler, new[] { newCommand });
}
catch (TargetInvocationException e)
{     
    ExceptionService.SendException(e.InnerException);
}

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