如何使用.net SDK（C＃）创建Azure搜索索引器以从Azure Blob存储中提取数据

Question

我阅读了有关Indexer的文档，并在下面找到了一种方法

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);

谁能告诉我如何在方法中指定fieldMappings参数？ 还是给我其他代码示例，以使用给定的数据源和索引创建索引器？

我创建了索引和数据源，但是在Azure搜索中为创建Blob存储数据而苦苦挣扎。 我希望使用c＃.NET SDK创建索引器。

Answer 1

此样本有帮助吗？ 它正在为SQL数据库建立索引，实际上并未显示FieldMapping的示例，但希望它将有助于显示您需要的部分。

Answer 2

您可以如下创建字段映射：

//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);

我还编写了以下函数来创建可能对修改有用的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);
        }