Question

I have an array of strings, and a Linq query:

/// <summary>
/// Return all the search results
/// </summary>
public static GenericTagEntity[] getSearchResults(int SectionID, string[] Words)
{
    GenericTagEntity[] Recs;

    using (MainContext db = new MainContext())
    {
        var q = (
            from c in db.tblArticles
            join a in db.tblForumAuthors on c.AuthorID equals a.Author_ID
            join u in db.tblProfiles on c.AuthorID equals u.UserID
            where c.IsDeleted == false
            && c.SectionID == SectionID
            select new
            {
                c.Title,
                c.ID,
                c.Anchor,
                c.Date,
                c.Description,
                u.EmailAddress,
                u.UserID,
                a.Username,
                c.Body,
                comments = (from f in db.tblComments where f.IsDeleted == false && f.Anchor == c.Anchor select new { f.ID }).Count()
            });

What I would like to do is modify the where so that it returns results where c.Title OR c.Body contain one or more of the words. I then need it ordered by total matches (most relevant first)!

This seems really difficult to me, any help is greatly appreciated.

I found this but it’s only partially helpful, also a SO search didn’t yield many results.
http://msdn.microsoft.com/en-us/library/bb546166.aspx#Y200

Answer 1

Sad to break it to you but you’re using wrong tool to solve this problem. Either create a full text index in db and invoke full text search from LINQ via a custom function or use 3rd party full text search system line Lucene.

If you really want to do it in sql then counting no. of instances of a word in a document would require you to change your db schema.

You need a words table (id, word) and a occurences table (wordid, articleid) and then you can do a query on the occurences table to get the results you want.