elasticsearch在C#中的使用

elsticsearch中安装了x-pack后，查询时就需要用户名和密码了。
无账号密码，不可访问
curl http://192.168.0.2:9200/testindex/_count?pretty=true
Authentication Required

访问basic认证的页面
（1）通过user选项带上账号密码，返回正常数据
curl –user elastic:changeme http://192.168.0.2:9200/testindex/_count?pretty=true

（2）在url中添加用户名和密码来访问：
http://elastic:changeme@192.168.0.2:9200/testindex/_count?pretty=true

（3）在请求头中添加Authorization来访问：
Authorization: “Basic 用户名和密码的base64加密字符串”

//HTTP Basic 验证客户端 C#实现:HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);request.Method = "GET";request.ContentType = "application/x-www-form-urlencoded";request.Credentials = CredentialCache.DefaultCredentials;//获得用户名密码的Base64编码string code= Convert.ToBase64String(Encoding.ASCII.GetBytes(string.Format("{0}:{1}", "username", "password")));//添加Authorization到HTTP头request.Headers.Add("Authorization", "Basic " + code);HttpWebResponse response = (HttpWebResponse)request.GetResponse();StreamReader reader = new StreamReader(response.GetResponseStream());string content= reader.ReadToEnd();

常用C#查询组件

官方组件Elasticsearch.Net & NEST

NEST手册

--//建立映射类    [ElasticsearchType(Name = "user", IdProperty = "Ncid")]    public class User    {        [Number(Name = "ncid")]        public int Ncid { get; set; }        [Text(Name = "name")]        public string Name { get; set; }        [Text(Name = "webclass")]        public string Webclass { get; set; }        [Date(Name = "birthday", Format = "yyyy-MM-dd", IgnoreMalformed = true, Coerce = true)]        public DateTime? Birthday { get; set; }        [Text(Name = "eduname")]        public string Eduname { get; set; }        [Number(Name = "sex", IgnoreMalformed = true, Coerce = true)]        public int Sex { get; set; }        [Text(Name = "selfment")]        public string Selfment { get; set; }        [Date(Name = "refreshtime", IgnoreMalformed = true, Coerce = true)]        public DateTime? Refreshtime { get; set; }    }//链接：        private ElasticClient Client()        {            var nodes = new Uri[]            {                new Uri("http://192.168.0.2:9200")            };            var pool = new StaticConnectionPool(nodes);            var settings = new ConnectionSettings(pool)                .DefaultIndex("testindex")                .BasicAuthentication("elastic", "changeme");            return new ElasticClient(settings);        }//添加记录            var client = Client();            var modUser4 = new User            {                Ncid = 4,                Name = "mygod4",                Sex = 1,                Eduname = "硕士",                Birthday = DateTime.Now.AddYears(-20),                Selfment = "中国长春市长春药店",                Webclass = "www.b.com",                Refreshtime = DateTime.Now,            };            client.Create(modUser4); //删除记录            var client = Client();            //删除单条记录            var rtnDel = client.Delete<User>(new DocumentPath<User>(2));            //删除多条记录            var delIds = new List<int>() { 4, 5 };            var bulkDel = new BulkRequest() { Operations = new List<IBulkOperation>() };            foreach (var id in delIds)            {                bulkDel.Operations.Add(new BulkDeleteOperation<User>(id));            }            var resultDel = client.Bulk(bulkDel);//更新记录            var client = Client();    //更新单条记录            IUpdateRequest<User, User> request = new UpdateRequest<User, User>(new DocumentPath<User>(2))            {                Doc = new User()                {                    Name = "胡三刀",                    Selfment = "test4update........"                }            };            var resp = client.Update<User, User>(request);            //更新多条记录            var insIds = new List<int>() { 4, 5 };            var bulkUpdate = new BulkRequest() { Operations = new List<IBulkOperation>() };            foreach (var id in insIds)            {                var operation = new BulkUpdateOperation<User, object>(id);                operation.Doc = new User{ Name = "胡一刀" };                bulkUpdate.Operations.Add(operation);            }            var result = client.Bulk(bulkUpdate);//查询            //查询一条数据            var modUser = client.Get<User>(3);             var tweet = JsonConvert.SerializeObject(modUser.Source);        //查询多条数据            var modList = client.Search<User>( s => s            .From(0)            .Size(10)            .Query(q =>                    q.Term(t => t.Webclass, "www.b.com")                    || q.Match(mq => mq.Field(f => f.Selfment).Query("中国"))                )            );

NEST使用方法
http://www.cnblogs.com/huhangfei/p/5726650.html

其他组件
plainElastic.net

参考：

http://www.cnblogs.com/eggTwo/p/4425269.html

http://blog.csdn.net/wulex/article/details/52138564

http://www.cnblogs.com/hyl8218/archive/2011/07/04/2097394.html
http://blog.csdn.net/kingson88/article/details/51252606