在SolrNet中突出显示

时间:2013-11-20 13:29:51

标签: c# asp.net-mvc solr highlighting solrnet

我有一个问题需要突出显示工作。我使用带有WCF服务的ASP.Net MVC应用程序。 WCF服务将结果返回到视图。我的代码是:

public IEnumerable<Dictionary<string, string>> SolrQuery(string searchString)
    {
        SolrInitialSetup(); 

        var solr = ServiceLocator.Current.GetInstance<ISolrOperations<SolrPDFDocument>>();

        var results = solr.Query(new SolrQueryByField("author", searchString),
            new QueryOptions
            {
                Highlight = new HighlightingParameters
                {
                    Fields = new[] { "search_snippet" },
                }
            });

        var returnedResults = new List<Dictionary<string, string>>();

        if (results.Count > 0)
        {
            foreach (var pdfDoc in results)
            {
                var docBuffer = new Dictionary<string, string>();
                docBuffer.Add("Id", ""+pdfDoc.Id.GetHashCode());
                docBuffer.Add("Content", "" + pdfDoc.Content.ElementAt(0));
                docBuffer.Add("Version", "" + pdfDoc.Version);

                foreach (var h in results.Highlights[results[0].Id])
                {
                    docBuffer.Add("search_snippet", String.Format("{0}", string.Join(", ", h.Value.ToArray())));
                    Debug.WriteLine("search_snippet", String.Format("{0}", string.Join(", ", h.Value.ToArray())));
                }
                returnedResults.Add(docBuffer);
            }
        }
        return returnedResults;
    }

@ Line foreach (var h in results.Highlights[results[0].Id])我在浏览器中遇到错误The given key was not present in the dictionary.我不知道什么是错的。

我的schema.xml:

    <field name="id" type="string" indexed="true" stored="true" required="true" multiValued="false" /> 
    <field name="content" type="text_general" indexed="true" stored="true" multiValued="true" termVectors="true" termPositions="true" termOffsets="true"/>
    <field name="author" type="text_general" indexed="true" stored="true" termVectors="true" termPositions="true" termOffsets="true"/>
    <field name="_version_" type="long" indexed="true" stored="true"/>
    <field name="search_snippet" type="text_general" indexed="true" stored="true" termVectors="true" termPositions="true" termOffsets="true" />

我的SolrPDFDocument.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using SolrNet.Attributes;

namespace WcfSearchService
{
    class SolrPDFDocument
    {
        [SolrUniqueKey("id")]
        public string Id { get; set; }

        [SolrField("author")]
        public string Author { get; set; }

        [SolrField("content")]
        public ICollection<string> Content { get; set; }

        [SolrField("search_snippet")]
        public ICollection<string> SearchSnippet { get; set; }

        [SolrField("_version_")]
        public long Version { get; set; }
    }
}

我的solrconfig.xml

<requestHandler name="/select" class="solr.SearchHandler">
    <!-- default values for query parameters can be specified, these
         will be overridden by parameters in the request
      -->
     <lst name="defaults">
       <str name="echoParams">explicit</str>
       <int name="rows">10</int>
       <str name="df">text</str>

     <!-- Highlighting defaults -->
       <str name="hl">on</str>
       <str name="hl.fl">search_snippet author content</str>
     </lst>
</requestHandler>

3 个答案:

答案 0 :(得分:2)

好的,我已经解决了我的问题。

而不是像那样使用示例代码:

var results = solr.Query(new SolrQueryByField("author", searchString),
        new QueryOptions
        {
            Highlight = new HighlightingParameters
            {
                Fields = new[] { "author" },
            }
        });

我像这样设置新字段的参数:

var results = solr.Query(new SolrQueryByField("text", searchString),
        new QueryOptions
        {
            Highlight = new HighlightingParameters
            {
                Fields = new[] { "*" },
            }
        });

所以我得到了所有结果的所有片段。谢谢你的帮助!!!!

答案 1 :(得分:0)

您可能根本没有获得任何突出显示结果。您可以调试代码并验证是否填充了results.Highlights。同时检查突出显示的默认值设置,因为我认为你需要设置hl = true。

 <str name="hl">true</str>

答案 2 :(得分:0)

这很有趣。对我来说,这不起作用(我没有得到任何结果):

var results = solr.Query(new SolrQueryByField("text", searchString),
        new QueryOptions
        {
            Highlight = new HighlightingParameters
            {
                Fields = new[] { "*" },
            }
        });

但是,这对我有用:

 var results = solr.Query(string.Format("{0}:{1}", "text", searchString),
            new QueryOptions
            {
                Highlight = new HighlightingParameters
                {
                    Fields = new[] { "*" },
                }
            });

我正在使用solr 4.6.0和SolrNet build#173(10月13日00:32)