IDataServiceStreamProvider.GetStreamETag Method
Definition
Important
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Returns the eTag of the media resource that belongs to the specified media link entry.
public:
System::String ^ GetStreamETag(System::Object ^ entity, System::Data::Services::DataServiceOperationContext ^ operationContext);public string GetStreamETag (object entity, System.Data.Services.DataServiceOperationContext operationContext);abstract member GetStreamETag : obj * System.Data.Services.DataServiceOperationContext -> stringPublic Function GetStreamETag (entity As Object, operationContext As DataServiceOperationContext) As StringParameters
- entity
- Object
The entity that is a media link entry with a related media resource.
- operationContext
- DataServiceOperationContext
The DataServiceOperationContext instance used by the data service to process the request.
Returns
eTag of the media resource associated with the entity.
Remarks
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.
