ComplexMoreLikeThisSample.cs

using System;
using PlainElastic.Net;
using PlainElastic.Net.Queries;
using PlainElastic.Net.Serialization;

namespace ComplexMoreLikeThisSample
{

    class Program
    {
        static void Main()
        {
            var connection = new ElasticConnection("localhost", 9200);
            var serializer = new JsonNetSerializer();


            // Add a sample document to index.
            var noteToIndex = new Note { Caption = "Test Note", Text = "Note to test MoreLikeThis query" };
            string noteJson = serializer.ToJson(noteToIndex);
            connection.Put(Commands.Index("notes", "note", "1"), noteJson);

            // Create Complex MoreLikeThis query.
            /*
            {
                "query": {
                    "bool": {
                        "must": [
                            { "match_all": { } }
                        ],
                        "should": [
                            {
                                "more_like_this": {
                                    "fields": [ "Caption" ],
                                    "like_text": "Test",
                                    "min_term_freq": 1,
                                    "min_doc_freq": 1
                                }
                            },
                            {
                                "more_like_this": {
                                    "fields": [ "Text" ],
                                    "like_text": "Note",
                                    "min_term_freq": 1,
                                    "min_doc_freq": 1
                                }
                            }
                        ],
                        "minimum_number_should_match": 1
                    }
                }
            }
            */
            string query = new QueryBuilder<Note>()
                .Query(q => q
                    .Bool(b => b
                        .Must(m => m
                            .MatchAll()
                        )
                        .Should(s => s
                            .MoreLikeThis(mlt => mlt
                                .Fields(note => note.Caption)
                                .LikText("Test")
                                .MinTermFreq(1)
                                .MinDocFreq(1)
                            )
                            .MoreLikeThis(mlt => mlt
                                .Fields(note => note.Text)
                                .LikText("Note")
                                .MinTermFreq(1)
                                .MinDocFreq(1)
                            )
                        )
                    )                    
                 )
                .BuildBeautified();

            Console.WriteLine("QUERY: \r\n" + query);

            // Execute query and deserialize results.
            string results = connection.Post(Commands.Search("notes", "note"), query);
            var noteResults = serializer.ToSearchResult<Note>(results);


            // Print results
            Console.WriteLine("\r\nFOUND NOTES: \r\n");
            foreach (var note in noteResults.Documents)
            {
                Console.WriteLine(note.Caption + ":  " + note.Text);
            }

            Console.ReadKey();
        }
    }


    public class Note
    {
        public string Caption { get; set; }
        public string Text { get; set; }
    }

}