如何获得在C＃中的异常错误code [英] How to get Exception Error Code in C#

问题描述

try
{
     object result = processClass.InvokeMethod("Create", methodArgs);
}
catch (Exception e)
{  
    // Here I was hoping to get an error code.
}

当我调用上面的WMI方法，我希望得到Access denied。在我的catch块我想确保提出的例外是确实拒绝访问。有没有一种方法，我可以得到的错误code呢？ Win32错误code的访问请求被拒绝为5。
我不想要搜索的错误消息否认字符串或类似的东西。

When I invoke the above WMI method I am expected to get Access Denied. In my catch block I want to make sure that the exception raised was indeed for Access Denied. Is there a way I can get the error code for it ? Win32 error code for Acceess Denied is 5. I dont want to search the error message for denied string or anything like that.

感谢

推荐答案

试试这个检查异常，内层的<一个href=\"http://msdn.microsoft.com/en-us/library/system.componentmodel.win32exception.aspx\">Win32Exception派生的异常。

try this to check the exception and the inner one for a Win32Exception derived exception.

catch (Exception e){  
    var w32ex = e as Win32Exception;
    if(w32ex == null) {
        w32ex = e.InnerException as Win32Exception;
    }    
    if(w32ex != null) {
        int code =  w32ex.ErrorCode;
        // do stuff
    }    
    // do other stuff   
}

由于在评论中，你真的需要看到实际被抛出什么异常，了解你可以做什么，在这种情况下，具体的缺点是pferred经过短短捕捉异常$ P $。是这样的：

As in the comments, you really need to see what exception is actually being thrown to understand what you can do, and in which case a specific catch is preferred over just catching Exception. Something like:

  catch (BlahBlahException ex){  
      // do stuff   
  }

此外的System.Exception有一个HRESULT

 catch (Exception ex){  
     int code = ex.HResult;
 }

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