How to convert Object^ to int32 in Windows Runtime Component?

Question

Hi, 

I want to write a function in WinRT component and call it in javascript. I use Object^ as parameter so that I need not to write many overloaded functions for different types of parameters. But I cannot convert Object^ to int32 or other types using static_cast.

demo code:

//in WinRT component
void someComponent::DoSomething(EnumType type, Object^ para)
{

    switch(type)

    {
        case EnumType::INT32:
        {
            int32 tmp = static_cast<int32>(para);
            //...
        }
        break;
        case EnumType::DOUBLE:
        {        
           double tmp = static_cast<double>(para);
           //...
        }
        break;
        default:
        break;
    }
}

call in javascript:

var compon = new someComponent();
compon.doSomething(enumType::int32, 100);
compon.doSomething(enumType::double, 99.99);

Answer 1

I find that if I call GetType in WinRT Component, the number "1" passed from js will return "Double". It means that every number passed from javascript to WinRT is a double. Is it right?

And I use static_cast<double>(para) to convert parameters successfully.

Answer 2

In all honesty, I would reconsider your design. Trying to convert a type strict interface into something that behave like java script is just attempting to pound square pegs into round holes.

Answer 3

Thanks for your suggest, I will think about it.