c#使用nest

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:[email protected]: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(new DocumentPath(2)); //删除多条记录 var delIds = new List<int>() { 4, 5 }; var bulkDel = new BulkRequest() { Operations = new List() }; foreach (var id in delIds) { bulkDel.Operations.Add(new BulkDeleteOperation(id)); } var resultDel = client.Bulk(bulkDel); //更新记录 var client = Client(); //更新单条记录 IUpdateRequest request = new UpdateRequest(new DocumentPath(2)) { Doc = new User() { Name = "胡三刀", Selfment = "test4update........" } }; var resp = client.Update(request); //更新多条记录 var insIds = new List<int>() { 4, 5 }; var bulkUpdate = new BulkRequest() { Operations = new List() }; foreach (var id in insIds) { var operation = new BulkUpdateOperationobject>(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(3); var tweet = JsonConvert.SerializeObject(modUser.Source); //查询多条数据 var modList = client.Search( 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

原文

https://blog.csdn.net/manimanihome/article/details/55682494