Why is filter not working with text/string values in Lucene.Net?

Question

I have made a filter in Lucene.Net to limit the result of the search. I am encountering a very strange issue. The filter is not working with Text Values but working with num

Answer 1

StandardAnalyzer will lowercase all the characters in your TokenStream.

Try this:

Filter LE = new QueryWrapperFilter(new TermQuery(new Term(field, "ZZZOCB9X9Y".ToLowerInvariant())));