TextSummarizationAPISample.Models.TextSummarizationModel.cs

        private static readonly string AccessKey = "<<your Key>>";
        private static readonly string Resouce = "<<your resourcename>>";
        private HttpClient SendClient = null;

        // Example method for summarizing text
        internal async Task<List<string>> TextSummarization(string document)
        {
            var result = new List<String>();
            var body = new TRequest.TRootobject()
            {
                analysisInput = new TRequest.TAnalysisinput()
                {
                    documents = new TRequest.TDocument[]
                    {
                        new TRequest.TDocument()
                        {
                            id = "1",
                            text = document,
                        }
                    }
                },
                tasks = new TRequest.TTasks()
                {
                    extractiveSummarizationTasks = new TRequest.TExtractivesummarizationtask[]
                    {
                        new TRequest.TExtractivesummarizationtask()
                        {
                            parameters = new TRequest.TParameters
                            {
                                sentenceCount = 3,
                                sortBy = "rank",
                            }
                        }
                    }
                }
            };

            try
            {
                if (this.SendClient == null)
                {
                    this.SendClient = new HttpClient();
                }
                if (this.SendClient != null)
                {
                    var requestBody = "";
                    var jobLocation = "";

                    using (var ms = new MemoryStream())
                    {
                        var serializer = new DataContractJsonSerializer(typeof(TRequest.TRootobject));
                        using (var sr = new StreamReader(ms))
                        {
                            serializer.WriteObject(ms, body);
                            ms.Position = 0;
                            requestBody = sr.ReadToEnd();
                        }
                    }

                    using (var request = new HttpRequestMessage())
                    {
                        request.Method = HttpMethod.Post;
                        request.RequestUri = new Uri($"https://{Resouce}.cognitiveservices.azure.com/text/analytics/v3.2-preview.2/analyze");
                        request.Content = new StringContent(requestBody, Encoding.UTF8, "application/json");
                        request.Headers.Add("Ocp-Apim-Subscription-Key", AccessKey);

                        using (var response = await this.SendClient.SendAsync(request))
                        {
                            response.EnsureSuccessStatusCode();

                            // 返却用ロケーションを取得する
                            jobLocation = response.Headers.GetValues("operation-location").ToList()[0];
                        }
                    }

                    if (!string.IsNullOrEmpty(jobLocation))
                    {
                        while (true)
                        {
                            using (var request = new HttpRequestMessage())
                            {
                                request.Method = HttpMethod.Get;
                                request.RequestUri = new Uri(jobLocation);
                                request.Headers.Add("Ocp-Apim-Subscription-Key", AccessKey);

                                using (var response = await this.SendClient.SendAsync(request))
                                {
                                    response.EnsureSuccessStatusCode();
                                    var jsonString = await response.Content.ReadAsStringAsync();
                                    using (var json = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(jsonString)))
                                    {
                                        var ser = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(TResult.TRootobject));
                                        {
                                            var summaryResults = ser.ReadObject(json) as TResult.TRootobject;
                                            if (summaryResults != null && summaryResults.tasks.completed == 1)
                                            {
                                                foreach (var item in summaryResults.tasks.extractiveSummarizationTasks[0].results.documents[0].sentences)
                                                {
                                                    result.Add(item.text);
                                                }
                                                json.Close();
                                                break;
                                            }
                                        }
                                    }
                                }
                                await Task.Delay(1000);
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                this.SendClient = null;
                throw;
            }
            return result;
        }