Pass javascript object to winrt component written in C#

Question

I have created a WinRT component in C# which accepts a collection as a parameter.

namespace MyNamespace {
  public sealed class MyClass {
    public MyFunction(IReadOnlyDictionary<string, string> properties) {
    }
  }
}

I am trying to use this component in javascript as follows:

var x = new MyNamespace.MyClass();
x.MyFunction({'aaa': 'bbbb'});

I am not sure why this is not working. Any Ideas?

My first thought is possibly that {'aaa': 'bbbb'} != IReadOnlyDictionary<string, string> — Colin Pear
– Colin Pear, Commented Jan 5, 2013 at 0:00
I tried IDictionary Instead of IReadOnlyDictionary and it doesn't work. I also tried to see what the definition looks like after the compilation of component takes place and the method signature looks like Windows.Foundation.Collections.IMap<string, string> but I don't know how to create such an object in javascript — Avi
– Avi, Commented Jan 5, 2013 at 0:08

Colin Pear · Accepted Answer · 2013-01-05 00:59:23Z

1

I think this is your answer.

var ps = new Windows.Foundation.Collections.PropertySet();
ps['aaa'] = "bbb";

var x = new MyNamespace.MyClass();
x.MyFunction(ps);

"Your WinRT component will need to expose (or reuse) a concrete class implementing the specific instantiation of IMap that you need..."

answered Jan 5, 2013 at 0:59

Colin Pear

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2 Comments

Avi Over a year ago

I think this works but it is quite inconvenient since I just have to re-implement all the dictionary methods again :( (marked your answer as answer since it at least works)

Colin Pear Over a year ago

Well you might be able to overload the methods to accept the javascript compatable object, reformat it, then pass it to the original method.

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