C#配合大数据开发,nest.dll的使用

一，添加Nest.dll引用

结果如下多了如下DLL：

Elasticsearch.Net.dll,Nest.dll

二，上代码：

using Common.EsModel;
using Elasticsearch.Net;
using Nest;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Common.Es
{
    /// <summary>
    /// Nest(ES)开发：
    /// 1，需要大数据提供节点地址，和账号密码
    /// 2，需要大数据提供表名和字段名
    /// 3，需要大数据提供一个可以查询数据的地址（这个地址是大数据搭建的）（需要大数据那边提供账号密码登陆），可以测试查询返回值，和测试查询语句是否正确
    /// </summary>
    public class EasticSearchUtil
    {
        /// <summary>
        /// ES查询上限
        /// </summary>
        public const int limitcount = 10000;
        public static string ElasticSearchAccount = "demo";
        public static string ElasticSearchPassword = "123456";
        /// <summary>
        /// 配置链接：
        /// </summary>
        /// <param name="data">查询的表名</param>
        /// <returns></returns>
        private ElasticClient GetClient(string data)
        {
            ////一个节点
            var nodes = new Uri[]
            {
                ///节点地址
                new Uri("http://192.168.0.1:1001"),
                new Uri("http://192.168.0.2:1001"),
                new Uri("http://192.168.0.3:1001"),
            };

            var pool = new StaticConnectionPool(nodes);
            var settings = new ConnectionSettings(pool).DefaultIndex(data).DefaultFieldNameInferrer((name) => name);
            settings.BasicAuthentication(ElasticSearchAccount, ElasticSearchPassword);
            return new ElasticClient(settings);
        }
        /// <summary>
        /// 查询 
        /// Term这个是查询映射实体不存在的字段（PS）
        /// </summary>
        /// <param name="province">省份名称</param>
        /// <param name="id">id</param>
        public IEnumerable<demo> search(string province, int id)
        {
            var searchResults = GetClient("demo").Search<demo>((s => s.From(0).Size(limitcount).Query(q => q.Term("Id", id) && q.Term("province", province)).Sort(st => st.Descending(ds => ds.Num))));
            return searchResults.Documents;
        }
        /// <summary>
        /// 新增
        /// </summary>
        /// <returns></returns>
        public bool create()
        {
            var model = new demo
            {
                Id = 4,
                Num = 1,
                city = "123",
            };

            var searchResults = GetClient("demo").Create<demo>(model, null);
            return searchResults.IsValid;
        }
        /// <summary>
        /// 删除
        /// </summary>
        /// <returns></returns>
        public bool del()
        {
            var client = GetClient("demo");
            var model = new demo { Id = 2, Num = 111 };
            //删除文档
            var response2 = client.Delete<demo>(model.Id);
            return response2.IsValid;
        }
        /// <summary>
        /// 更新
        /// </summary>
        /// <returns></returns>
        public bool update()
        {
            var  model = new demo { Id = 2, Num = 111 };
            //根据demoID来修改文档，如果存储里存在一个CompanyID等于2的文档，他就会用新的替换旧的，否则就创建一个。
            var response = GetClient("demo").Index(model, i => i.Id(model.Id));
            return response.IsValid;
        }
    }
}