This method is provides the Developer with a simple means of controlling data flow between client and server without fully implementing their own MarkupImageDataProvider. This method can be overridden in a derivation of either of the 2 provided MarkupImageDataProvider implementations (File and Sql) to retain all of the functionality of that MarkupImageDataProvider while giving the Developer the opportunity to intercept, reject, process, and alter the Markup Layer List returned by any request.

If markupLayerList is set to null or this method thows an exception, an empty Markup Layer List will be returned to the client.

MarkupArtDataConnection.List

'Declaration
 
Public Overridable Sub OnList( _
   ByRef markupLayerList As List(Of MarkupLayerInfo), _
   ByVal documentIdentifier As String, _
   ByVal connectionContextData As NameValueCollection _
) 

'Usage
 
Dim instance As MarkupArtMiddleware
Dim markupLayerList As List(Of MarkupLayerInfo)
Dim documentIdentifier As String
Dim connectionContextData As NameValueCollection
 
instance.OnList(markupLayerList, documentIdentifier, connectionContextData)

public virtual void OnList( 
   ref List<MarkupLayerInfo> markupLayerList,
   string documentIdentifier,
   NameValueCollection connectionContextData
)

public: virtual void OnList( 
   ref List<MarkupLayerInfo*>* markupLayerList,
   string* documentIdentifier,
   NameValueCollection* connectionContextData
) 

public:
virtual void OnList( 
   List<MarkupLayerInfo^>^% markupLayerList,
   String^ documentIdentifier,
   NameValueCollection^ connectionContextData
)