使用C# Nest在ElasticSearch中按短语聚合

var settings = new ConnectionSettings(new Uri("http://localhost:9200"))
    .DefaultIndex("your_index_name")
    .BasicAuthentication("username", "password");

var client = new ElasticClient(settings);

var searchRequest = new SearchRequest
{
    Size = 0,
    Aggregations = new TermsAggregation("phrase_agg")
    {
        Field = new Field("your_field_name"),
        Size = 10 // 指定返回的分组数量
    }
};

var searchResponse = client.Search<Document>(searchRequest);

var phraseAggregation = searchResponse.Aggregations.Terms("phrase_agg");
foreach (var bucket in phraseAggregation.Buckets)
{
    var phrase = bucket.Key;
    var docCount = bucket.DocCount;
    
    // 处理每个分组的结果
}