在使用C# NEST HighLevel客户端过滤Elasticsearch中的多个字段和值时,你可以使用Bool
查询来组合多个条件。以下是一个示例代码,展示了如何实现这一点:
using Nest;
using System.Collections.Generic;
public class ElasticsearchFilterExample
{
public static void Main(string[] args)
{
var settings = new ConnectionSettings(new Uri("http://localhost:9200"))
.DefaultIndex("your_index_name");
var client = new ElasticClient(settings);
var filterFields = new List<string> { "field1", "field2" };
var filterValues = new Dictionary<string, List<string>>
{
{ "field1", new List<string> { "value1", "value2" } },
{ "field2", new List<string> { "value3", "value4" } }
};
var boolQuery = new BoolQuery
{
Must = new List<QueryContainer>
{
new TermsQuery
{
Field = "field1.keyword",
Terms = filterValues["field1"]
},
new TermsQuery
{
Field = "field2.keyword",
Terms = filterValues["field2"]
}
}
};
var searchResponse = client.Search<dynamic>(s => s
.Query(q => boolQuery)
);
foreach (var hit in searchResponse.Hits)
{
Console.WriteLine(hit.Source);
}
}
}
must
, should
, must_not
, filter
等子句。filter
子句可以提高查询性能,因为filter
子句不会计算得分。keyword
类型进行精确匹配。filter
子句可以提高查询性能,避免不必要的评分计算。通过以上示例代码和解释,你应该能够使用C# NEST HighLevel客户端过滤Elasticsearch中的多个字段和值。
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