Lucene.NET 实时更新索引

最新推荐文章于 2021-09-05 20:29:03 发布

原创最新推荐文章于 2021-09-05 20:29:03 发布 · 3k 阅读

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本文详细介绍了如何使用Lucene进行文件操作整合的技术实践，包括文件读取、索引创建、更新及删除操作。

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更新（添加）

protected void btnUpdate_Click(object sender, EventArgs e)
{
Boolean EnableCreate = true;

            if (System.IO.File.Exists(index + "\\segments.gen"))
            {
                EnableCreate = false;
            }

IndexWriter writer = new IndexWriter(FSDirectory.Open(new System.IO.FileInfo(index)), new StandardAnalyzer(Version.LUCENE_CURRENT), EnableCreate);

// System.IO.FileInfo file = new System.IO.FileInfo(txtID.Text.Trim().Replace("\\", "\\\\"));

System.IO.FileInfo file = new System.IO.FileInfo(@"E:\Demo\Document\ksp.txt");
Term term = new Term("path", txtID.Text.Trim());

Lucene.Net.Documents.Document document = FileDocument.Document(file);

writer.UpdateDocument(term, document);

writer.Close();
}

删除

protected void btnDel_Click(object sender, EventArgs e)
        {
            try
            {
                Directory directory = FSDirectory.Open(new System.IO.FileInfo(index));
                IndexReader reader = IndexReader.Open(directory, false);

                //// 删除所有记录
                for (int i = 0; i < reader.MaxDoc(); i++)
                {
                    reader.DeleteDocument(i);
                }

                //if (rdlDel.SelectedValue == "1") //根据ID删除记录
                //{
                //    Int32 i = Convert.ToInt32(txtID.Text);
                //    reader.DeleteDocument(i);
                //    ltrResult.Text = "删除成功";
                //}
                //else if (rdlDel.SelectedValue == "2") // 根据路径删除记录
                //{
                //    Term term = new Term("path", txtID.Text.Trim());
                //    Int32 num = reader.DeleteDocuments(term);
                //    ltrResult.Text = "删除" + num.ToString() + "条记录成功";
                //}

                Response.Write(reader.MaxDoc().ToString());
                reader.Close();
                directory.Close();

            }
            catch (System.Exception ex)
            {
                ltrResult.Text = " caught a " + e.GetType() + "\n with message: " + ex.Message;
            }
        }