如何使用 dotnet lucene 从单个文档搜索中检索字段和相应的值？

Question

我有一个|分隔的 txt 文档，其中我有 ScenarioId、输入值、数据库值等字段我正在为这些值编制索引。

doc.Add(new Field("Database value", List.Databasevalue, Field.Store.YES, Field.Index.ANALYZED));
 var parser = new QueryParser(Lucene.Net.Util.Version.LUCENE_30, "Database value", analyzer);
 Console.WriteLine("Text found: {0}" + Environment.NewLine, document.Get("Database value"));

由于我输入的只是一份文件。我不在乎文档编号。如果有任何匹配项，我需要从输入文件和相应的分数中检索相应的数据库值。我如何实现它？ Document里面有个Get函数不知道是怎么用的！有人可以帮助我吗，因为 dotnet lucene

可用的资源有限

Answer 1

我仍然不太清楚你需要什么，但这里有一些示例代码（以 xUnit 测试的形式）用于索引文档、执行搜索然后在 [=13= 中读取文档] 4.8.

[Fact]
        public void StandardAnalyzerExample() {

            Directory indexDir = new RAMDirectory();

            Analyzer standardAnalyzer = new StandardAnalyzer(LuceneVersion.LUCENE_48);

            IndexWriterConfig indexConfig = new IndexWriterConfig(LuceneVersion.LUCENE_48, standardAnalyzer);
            indexConfig.UseCompoundFile = true;

            IndexWriter writer = new IndexWriter(indexDir, indexConfig);


            SearcherManager searcherManager = new SearcherManager(writer, applyAllDeletes: true, new SearchWarmer());

            Document doc = new Document();
            doc.Add(new StringField("examplePrimaryKey", "001", Field.Store.YES));
            doc.Add(new TextField("exampleField", "Unique gifts are great gifts.", Field.Store.YES));
            writer.AddDocument(doc);

            doc = new Document();
            doc.Add(new StringField("examplePrimaryKey", "002", Field.Store.YES));
            doc.Add(new TextField("exampleField", "Everyone is gifted.", Field.Store.YES));
            writer.AddDocument(doc);

            doc = new Document();
            doc.Add(new StringField("examplePrimaryKey", "003", Field.Store.YES));
            doc.Add(new TextField("exampleField", "Gifts are meant to be shared.", Field.Store.YES));
            writer.AddDocument(doc);

            writer.Commit();

            searcherManager.MaybeRefreshBlocking();
            IndexSearcher indexSearcher = searcherManager.Acquire();
            try {
                QueryParser parser = new QueryParser(LuceneVersion.LUCENE_48, "exampleField", standardAnalyzer);
                Query query = parser.Parse("everyone");

                TopDocs topDocs = indexSearcher.Search(query, int.MaxValue);

                int numMatchingDocs = topDocs.ScoreDocs.Length;
                Assert.Equal(1, numMatchingDocs);


                Document docRead = indexSearcher.Doc(topDocs.ScoreDocs[0].Doc);     //this is how you read back a doc
                string primaryKey = docRead.Get("examplePrimaryKey");
                Assert.Equal("002", primaryKey);

            } finally {
                searcherManager.Release(indexSearcher);
            }

        }

    }

如何使用 dotnet lucene 从单个文档搜索中检索字段和相应的值？

How to retrieve the fields and respective values from a single document search using dotnet lucene?

lucene.net