Can I create custom exception in c++ and then catch it in javascript code?

Question

 I developed one metro app in javascript and another WinRT component in c++.
 Also I declared a custom exception in c++ WinRT component.
 How can i catch this custom exception in my javascript app?
 Thanks for your help.

Answer 1

Hi Ring_ABC,

 

All Windows Runtime exceptions are ref classes which derive from Platform::Exception. When you throw an exception across the ABI boundary, you must throw one of these Exception types. You cannot derive your own type from Platform::Exception. To throw a custom exception, you can use COMException and supply a user-defined HRESULT.

please refer to http://msdn.microsoft.com/en-us/library/windows/apps/hh441561(v=vs.110).aspx for more details.

 

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Answer 2

So can you provide a little more detail?

For example, this is what I'm doing right now:

   public: static void MyErrorClass::CheckErrorCode(int code)
   {
      if(code < 1)
      {
         throw ref new COMException(code);
      }
   }

But, what happens in C#, is the following, which is pretty much useless for my customers:

=======================

An exception of type 'System.Exception' occurred in CSMainDemo.exe but was not handled in user code

WinRT information: The text associated with this error code could not be found.

Additional information: The text associated with this error code could not be found.

If there is a handler for this exception, the program may be safely continued.

Answer 3

The RP contains a String constructor for FailureException. However using it, does not give me the string the calling app. Its still "Unknown failure" error text.

Answer 4

Have to pick this up again. How do the WinRT components from MSFT attach custom error messages? I tried RoOriginateError to no avail.

Answer 5

The link referenced above:

http://msdn.microsoft.com/en-us/library/windows/apps/hh441561(v=vs.110).aspx

results in "This topic is no longer available".

I am very interested in this information, is it available anywhere else?