asp.net core集成ElasticSearch+实现全文检索功能

public class ElasticSearchService
{
    private readonly ElasticClient _elasticClient;
 
    public ElasticSearchService(IOptions<ElasticSearchOptions> options)
    {
        var settings = new ConnectionSettings(new Uri(options.Value.Uri))
            .DefaultIndex(options.Value.DefaultIndex);
 
        if (!string.IsNullOrEmpty(options.Value.Username))
        {
            settings.BasicAuthentication(options.Value.Username, options.Value.Password);
        }
 
        _elasticClient = new ElasticClient(settings);
    }
 
    public async Task<IReadOnlyCollection<TDocument>> SearchAsync<TDocument>(string query, int size = 10)
        where TDocument : class
    {
        var searchResponse = await _elasticClient.SearchAsync<TDocument>(s => s
            .Query(q => q
                .MultiMatch(m => m
                    .Query(query)
                    .Fields(f => f
                        .Field(ff => ff.Title)
                        .Field(ff => ff.Content)
                    )
                )
            )
            .Size(size)
        );
 
        return searchResponse.Documents;
    }
}
 
public class ElasticSearchOptions
{
    public string Uri { get; set; }
    public string DefaultIndex { get; set; }
    public string Username { get; set; }
    public string Password { get; set; }
}

这个代码示例展示了如何在ASP.NET Core应用程序中集成ElasticSearch，并实现了一个搜索方法，该方法可以接受一个查询字符串并返回与之匹配的文档集合。这个简化的例子使用了NEST库来与ElasticSearch交互，并展示了如何执行基本的全文搜索查询。在实际应用中，你可能需要添加更多的配置和错误处理。