functions-bindings-storage-blob-input-dotnet-isolated-types.md

author	mattchenderson
ms.service	azure-functions
ms.topic	include
ms.date	07/10/2023
ms.author	mahender

When you want the function to process a single blob, the blob input binding can bind to the following types:

Type	Description
string	The blob content as a string. Use when the blob content is simple text.
byte[]	The bytes of the blob content.
JSON serializable types	When a blob contains JSON data, Functions tries to deserialize the JSON data into a plain-old CLR object (POCO) type.
Stream1	An input stream of the blob content.
BlobClient1, BlockBlobClient1, PageBlobClient1, AppendBlobClient1, BlobBaseClient1	A client connected to the blob. This set of types offers the most control for processing the blob and can be used to write back to it if the connection has sufficient permission.

When you want the function to process multiple blobs from a container, the blob input binding can bind to the following types:

Type	Description
T[] or List<T> where T is one of the single blob input binding types	An array or list of multiple blobs. Each entry represents one blob from the container. You can also bind to any interfaces implemented by these types, such as IEnumerable<T>.
BlobContainerClient1	A client connected to the container. This type offers the most control for processing the container and can be used to write to it if the connection has sufficient permission.

¹ To use these types, you need to reference Microsoft.Azure.Functions.Worker.Extensions.Storage.Blobs 6.0.0 or later and the common dependencies for SDK type bindings.