如何使用.net SDK（C＃）創建Azure搜索索引器以從Azure Blob存儲中提取數據

Question

我閱讀了有關Indexer的文檔，並在下面找到了一種方法

public Indexer (string name, string dataSourceName, string targetIndexName, string description = null, string skillsetName = null, Microsoft.Azure.Search.Models.IndexingSchedule schedule = null, Microsoft.Azure.Search.Models.IndexingParameters parameters = null, System.Collections.Generic.IList<Microsoft.Azure.Search.Models.FieldMapping> fieldMappings = null, System.Collections.Generic.IList<Microsoft.Azure.Search.Models.FieldMapping> outputFieldMappings = null, Nullable<bool> isDisabled = null, string eTag = null);

誰能告訴我如何在方法中指定fieldMappings參數？ 還是給我其他代碼示例，以使用給定的數據源和索引創建索引器？

我創建了索引和數據源，但是在Azure搜索中為創建Blob存儲數據而苦苦掙扎。 我希望使用c＃.NET SDK創建索引器。

Answer 1

此樣本有幫助嗎？ 它正在為SQL數據庫建立索引，實際上並未顯示FieldMapping的示例，但希望它將有助於顯示您需要的部分。

Answer 2

您可以如下創建字段映射：

//this creates a field mapping for they key assigned to the blob in blob storage
 var keyMapping = new FieldMapping("metadata_storage_name", "key", new FieldMappingFunction { Name = "base64Encode", Parameters = null });
 var mappings = new List<FieldMapping>();
 mappings.Add(keyMapping);

我還編寫了以下函數來創建可能對修改有用的Blob索引器：

private static void CreateBlobIndexer(SearchServiceClient serviceClient
            , string IndexerName
            , string Description
            , string SourceName
            , string IndexName
            , IndexingSchedule Schedule
            , List<FieldMapping> Mappings)
        {
            var indexingParams = new IndexingParameters();

            indexingParams.MaxFailedItems = Convert.ToInt32(ConfigurationManager.AppSettings["MaxFailures"]);
            indexingParams.MaxFailedItemsPerBatch = Convert.ToInt32(ConfigurationManager.AppSettings["MaxFailures"]);
            indexingParams.DoNotFailOnUnsupportedContentType();
            indexingParams.IndexFileNameExtensions(new string[] { ".pdf" });

            var definition = new Indexer()
            {
                Name = IndexerName,
                Description = Description,
                DataSourceName = SourceName,
                TargetIndexName = IndexName,
                Schedule = Schedule,
                FieldMappings = Mappings,
                Parameters = indexingParams
            };

            serviceClient.Indexers.Create(definition);
        }