Lucene中对document的CURD操作:为分布式全文检索设计

作者：用户投稿来源：网络发布时间： 13/01/12

更新操作事实上就是先把记录删除，再追加一条新的记录即可，而IndexWriter为我们提供的UpdateDocuments感觉更向是在复制一个，所以不建议使用它，

而是手动删除和追加来完成这个update操作。

[WebMethod]  
         public int UpdateLuceneDocument(string primaryKey, string id, string name, string info, string categoryName, string propertyName, string module, string passKey)  
         {  
             int flag = 0;  
             try 
             {  
                 dirInfo = Directory.CreateDirectory(this.GetIndexPath(ConfigurationManager.AppSettings[module]));  
                 directory = LuceneIO.FSDirectory.Open(dirInfo);  
                 IndexWriter writer = new IndexWriter(directory, new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29), false, IndexWriter.MaxFieldLength.UNLIMITED);  
                 Document doc = new Document();  
                 doc.Add(new Field("PrimaryKey", primaryKey, Field.Store.YES, Field.Index.ANALYZED));  
                 doc.Add(new Field("ID", id, Field.Store.YES, Field.Index.NO));  
                 doc.Add(new Field("Name", name, Field.Store.YES, Field.Index.ANALYZED));  
                 doc.Add(new Field("Info", info, Field.Store.YES, Field.Index.ANALYZED));  
                 doc.Add(new Field("CategoryName", categoryName, Field.Store.YES, Field.Index.ANALYZED));  
                 doc.Add(new Field("PropertyName", propertyName, Field.Store.YES, Field.Index.ANALYZED));  
                 QueryParser parser = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "PrimaryKey", new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29));  
                 Query query = parser.Parse(primaryKey);  
                 writer.DeleteDocuments(query);  
                 writer.Commit();  
                 writer.AddDocument(doc);  
                 writer.Optimize();  
                 writer.Close();  
                 flag = 1;  
             }  
             catch (Exception)  
             {  
   
                 throw;  
             }  
   
             return flag;  
         }