Question

I have Cusom collection object containing a collection of objects. I then have two UI elements (a grid and chart) bound to this single object. The grid shows all the objects and the chart shows a subset of the same collection.

What I want to be able to do is register a filter in the collection (Func<>?) and conditionally execute the filter to create the subset collection.

Really not sure how to approach this. Any pointers would be really helpful.

Answer 1

You can just pass in the Func<> into the Where() static method. The output will be a new IEnumerable collection you can bind to your UI elements. The function you register must be of type Func<ItemInYourCollection, Boolean>.

If you want to switch between using the filter and not using the filter, it may be easiest to use a “non-filtering” function:

Func<ItemInYourCollection, Boolean> filter = (a) => true;
if(filtering) filter = registeredFilter;
UI.Data = rawData.Where(filter);