ImageDataProvider is a base class derived from the System.Configuration.Provider.ProviderBase class ( System.Configuration.Provider.ProviderBase ). It is an abstract class which forms the foundation of a mechanism by which image/document and annotation data can be requested by the client viewer given a Data Provider Name (optional, can use default data provider), a Document Identifier, and/or a Markup Layer Record ID. Any implementation of a Data Provider must create derivations of all 5 abstract data provider base classes.

The structure of a MarkupImageDataProvider is heirarchical such that a MarkupImageDataProvider derives from Microsoft's ProviderBase and is instantiated from settings specified in Web.confg. Through the OpenImageData() and OpenArtData() methods, the MarkupImageDataProvider opens a MarkupImageDataConnection or MarkupArtDataConnection. This is done so that the connection classes may store contextual information pertinent to that particular provider, ex. (and SQL Data Provider which requires a connection to an SQL database, or an FTP data provider, also requiring a connection). From the connection, a Document Data Connection is opened for a document with a particular identifier. The Document Data Connection classes contain methods that facilitate file operations. Both the Data Connection and Document Data Connection classes implement the IDisposable interface.

ImageGear.Web.DataProviders.MarkupImageDataConnectionT:ImageGear.Web.DataProviders.MarkupArtDataConnectionMarkupArtDocumentDataConnection

'Declaration
 
Public MustInherit Class MarkupImageDataProvider 
   Inherits System.Configuration.Provider.ProviderBase

'Usage
 
Dim instance As MarkupImageDataProvider

public abstract class MarkupImageDataProvider : System.Configuration.Provider.ProviderBase 

public __gc abstract class MarkupImageDataProvider : public System.Configuration.Provider.ProviderBase 

public ref class MarkupImageDataProvider abstract : public System.Configuration.Provider.ProviderBase