OpenSearch:Basic search

Download dependency packages at https://www.nuget.org/packages.

dotnet add package AlibabaCloud.TeaUtil --version  0.1.5
dotnet add package AlibabaCloud.OpenSearchUtil --version 1.0.2
dotnet add package Aliyun.Credentials --version  1.2.1
dotnet add package Tea --version 0.4.0

The following sample code shows how to search for documents using the SDK for C#:

using System;
using System.Collections.Generic;
using AlibabaCloud.TeaUtil.Models;
using Tea;

namespace ConsoleApp
{
    internal class Program
    {
        public static Dictionary<string, object> searchDoc(Client opensearchClient, string appName,
            Dictionary<string, object> queryParams, Dictionary<string, string> header, RuntimeOptions runTime)
        {
            string pathName = "/v3/openapi/apps/" + appName + "/search";

            try
            {
                return opensearchClient._request("GET", pathName, queryParams, header, null, runTime);
            }
            catch (TeaException e)
            {
                Console.WriteLine(e);
                throw;
            }
        }


        private static void Main(string[] args)
        {
            var runtime = new RuntimeOptions
            {
                ConnectTimeout = 5000,
                ReadTimeout = 10000,
                MaxAttempts = 0,
                Autoretry = false,
                IgnoreSSL = false,
                MaxIdleConns = 50
            };

            var config = new Config
            {
                // Specify the endpoint of the OpenSearch API. You can obtain the endpoint from the OpenSearch console.
                Endpoint = "opensearch-cn-hangzhou.aliyuncs.com",

                // Specify the request protocol. Valid values: HTTPS and HTTP.
                Protocol = "HTTPS",

                /* Specify your user credentials.
                Obtain the AccessKey ID and AccessKey secret from environment variables.
                Before you run this code, you must configure the environment variables. For more information, see the "Configure environment variables" section in this topic. */
                AccessKeyId =  System.Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_ID"),
                AccessKeySecret = System.Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_SECRET"),

                // Specify the authentication method. The default value is access_key. A value of sts indicates authentication based on RAM and Security Token Service (STS).
                // Valid values: sts and access_key.
                Type = "access_key",

                // If you use authentication based on RAM and STS, you must specify the security_token parameter. You can call the AssumeRole operation of Alibaba Cloud to obtain an STS token.
                SecurityToken = "",
            };

            // Create an OpenSearch client instance.
            var openSearch = new Client(config);

            // The name of the app to search.
            var appName = "appName";

            // Customize HTTP headers.
            var header = new Dictionary<string, string>();

            // The structure of the query request.
            // The format parameter in the config clause supports only json and fulljson. 
            var docQuery = new Dictionary<string, object>
            {
                {
                    "query",
                    "config=start:0,hit:10,format:fulljson&&query=(default:\"Search\" AND default:\"OpenSearch\") OR (default:\"search engine\" AND default:\"policy\")"
                },
                {"second_rank_name", "att"}, {"first_rank_name", "sdfrsdfs"}, {"fetch", "qp:profile"},
                {"fetch_fields", "title"}
            };


            
            try
            {
                Dictionary<string, object> ops = searchDoc(openSearch, appName, docQuery, header, runtime);
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
                throw;
            }
        }
    }
}