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)
Syntax
'Declaration
Function GetStreamETag ( _
entity As Object, _
operationContext As DataServiceOperationContext _
) As String
'Usage
Dim instance As IDataServiceStreamProvider
Dim entity As Object
Dim operationContext As DataServiceOperationContext
Dim returnValue As String
returnValue = instance.GetStreamETag(entity, _
operationContext)
string GetStreamETag(
Object entity,
DataServiceOperationContext operationContext
)
String^ GetStreamETag(
Object^ entity,
DataServiceOperationContext^ operationContext
)
abstract GetStreamETag :
entity:Object *
operationContext:DataServiceOperationContext -> string
function GetStreamETag(
entity : Object,
operationContext : DataServiceOperationContext
) : String
Parameters
- entity
Type: System.Object
The entity that is a media link entry with a related media resource.
- operationContext
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.
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.