Nest客户端的基本使用方法

通过Nuget安装好Nest的相关Dll，之后我们就可以开始了，

1.初始化Nest客户端

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string indexName = "customer"; Uri uri = new Uri("http://localhost:9200"); ConnectionSettings settings = new ConnectionSettings(uri); settings.DisableDirectStreaming().DefaultIndex(indexName); ElasticClient client = new ElasticClient(settings);

 

 2.创建一个Customer索引

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dynamic response = client.GetIndex(indexName);  if(!response.IsValid)   {      response = client.CreateIndex("customer");      Console.WriteLine(response);    }

 3.创建文档

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var company = new Company { CompanyID=2, Name="IBM" };              //创建文档并指定索引，和文档ID              response = client.Index(company, i => i.Index(indexName).Id(company.CompanyID));              //创建文档并指定索引，文档类型，未指定文档ID,ElasticSearch会帮你生成一个随机的ID              response = client.Index(company, i => i.Index(indexName));              //这里没有显示指定索引，所以使用的客户端初始化默认索引，如果没有默认索引，就会发生错误              response = client.Index(company);

 4.修改文档1

根据CompanyID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。

所以叫创建式修改比较合适

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company = new Company { CompanyID = 2, Name = "联想" };  //修改文档  response = client.Index(company, i => i.Id(company.CompanyID));

 5.修改指定版本号的文档（对乐观锁的实现）

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company = new Company { CompanyID = 2, Name = "联想" };               //修改指定版本的文档               response = client.Index(company, i => i.Id(company.CompanyID).Version(1));

6.删除文档

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//根据特定的条件来删除文档   response = client.Delete<Company>(company.CompanyID, d => d.Index(indexName));  //删除文档  response = client.Delete<Company>(company.CompanyID);

 

7.删除索引

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1 2	//根据名称删除索引 response=client.DeleteIndex(indexName);

 8.批量创建文档

这里是指定了相应的索引，如果没有显示指定索引，都是用的默认索引，

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//批量创建文档 BulkDescriptor descriptor = new BulkDescriptor(); descriptor.Index<Company>(op => op.Document(new Company { CompanyID = 1, Name = "IBM" }).Index("a")); descriptor.Index<Company>(op => op.Document(new Company { CompanyID = 2, Name = "IBM" }).Index("b")); descriptor.Index<Company>(op => op.Document(new Company { CompanyID = 3, Name = "IBM" }).Index("c"));   response = client.Bulk(descriptor);