Brokered Windows运行时组件-System.Decimal

Question

I am receiving a compiler error:

"Method xxx has parameter value of type "System.Decimal". "System.Decimal" is not a valid Windows Runtime must return only Windows Runtime types."

Is there anyway I can use a decimal? or should I just store the value as cents in an integer?

Answer 1

I found the easiest solution was to store it as cents in an integer.

I believe this may not work for all the currencies in the world but I am only concerned with dollars so its not an issue in this particular scenario.

An alternative is to implement a "money" pattern - http://martinfowler.com/eaaCatalog/money.html

Answer 2

Actually, I found the easiest way is to use double for the return values and parameters of my WinRT component.

This is what I have in my C# Class Library

public static double Round(double value, int digits)
{
    // do stuff
}

This is the code of a C# Windows Runtime Portable Class Library I created as a wrapper to be called from my JavaScript code

public static double Round(double val, int digits)
{
    return MyCSharpClassLib.Class.Round(val, digits);
}

And from my JavaScript project, this is what I call

var round = WindowsRuntimeWrapper.Class1.round(3.1415926549, 3);

And it works just fine!