IDataServiceStreamProvider.GetStreamETag Method

Returns the eTag of the media resource that belongs to the specified media link entry.

Namespace:  System.Data.Services.Providers
Assembly:  Microsoft.Data.Services (in Microsoft.Data.Services.dll)

string GetStreamETag(
	Object entity,
	DataServiceOperationContext operationContext


Type: System.Object
The entity that is a media link entry with a related media resource.
Type: System.Data.Services.DataServiceOperationContext
The DataServiceOperationContext instance used by the data service to process the request.

Return Value

Type: System.String
eTag of the media resource associated with the entity.

The GetStreamETag method is called by the data service runtime to retrieve the eTag of the media resource that is associated with the entity.

You must implement the GetStreamETag method to enable the data service to manage concurrency for the media resource.