lucene.net

Dim qp1 As New QueryParser("filename", New StandardAnalyzer()) Dim qp2 As New QueryParser("filetext", New StandardAnalyzer()) . . I am using the 'Lucene.Net' library and have the following question. Instead of creating two separate QueryParser objects and using them to obtain two Hits objects, is it possible perform a search on both fields using a single QueryParser object, so that I have only one Hits object which gives me the overall score of each Document? There are 3 ways to do this. The first way is to construct a query manually, this is what QueryParser is doing internally. This is the

I havent used lucene. Last time i ask (many months ago, maybe a year) people suggested lucene. If i shouldnt use lucene what should i use? As am example say there are items tagged like this apples carrots apples carrots apple banana if a user search apples i dont care if there is any preference from 1,2 and 4. However i seen many forums do this which i HATED is when a user search apple carrots 2 and 3 have high results while 1 is hard to find even though it matches my search more closely. Also i would like the ability to do search carrots -apples which will only get me 3. I am not sure what

What are the various ways of optimizing Lucene performance? Shall I use caching API to store my lucene search query so that I save on the overhead of building the query again? Mitch Wheat Have you looked at Lucene Optimization Tip: Reuse Searcher Advanced Text Indexing with Lucene Should an index be optimised after incremental indexes in Lucene? Quick tips: Keep the size of the index small. Eliminate norms, Term vectors when not needed. Set Store flag for a field only if it a must. Obvious, but oft-repeated mistake. Create only one instance of Searcher and reuse. Keep in the index on fast

I use Lucene.Net to index some documents. I want to show the user a couple of lines as to why that document is in the result set. just like when you use google to search and it shows the link and followed by the link there are a few lines with the keywords highlighted. any ideas? When you have a result you can get the indexed text pass it along with your query through a method similar to this: public string GeneratePreviewText(Query q, string text) { QueryScorer scorer = new QueryScorer(q); Formatter formatter = new SimpleHTMLFormatter(highlightStartTag, highlightEndTag); Highlighter

If the search query contains a leading wildcard character ( * or ? ), the QueryParser 's Parse function throws an error. Dim q As String = "*abc" Dim qp As New QueryParser("text", New StandardAnalyzer()) Dim query As Query = qp.Parse(q) Is there any way to solve this problem in Lucene.NET v2.0.0.4? Set QueryParser.SetAllowLeadingWildcard Method to true. The API page states that "this can produce very slow queries on big indexes" though. Maybe you have to use a WildcardQuery , but ...In order to prevent extremely slow WildcardQueries, a Wildcard term should not start with one of the wildcards..