I've been looking at your project to implement highlighting in my search results. But I'm using multiple search fields via dropdownlists and a keyword field. So I'm creating a ISearchCriteria filter using the fluent api to filter based on fields, ie using groupedor etc..., instead of converting a string (RawQuery).

So far, I haven't found any way to convert the filter into a string for using the GetHighlight method. Have you come across this issue?

Cheers