ImageGear for .NET
Enabling Annotation within a Custom Image Data Provider
| ImageGear for .NET User Guide > Using ImageGear for .NET > Using ImageGear.Web.DataProviders Namespace > Implementing Annotations in an Image Data Provider > Enabling Annotation within a Custom Image Data Provider |
Implementing a Custom Image Data Provider that supports annotation requires an understanding of Transactional Programming (see Background Information on Transactions).
Most modern database engines are transactional and obey the semantics of the System.Transactions.TransactionScope object. Creating a custom data provider for a transactional system is fairly straightforward (see Using a Transactional Resource).
Creation of a custom image data provider for a non-transactional system (such as the file system) is also supported by ImageGear, but requires some additional steps to handle and manage the transactional resources (see Using a Non-Transactional Resource).
To assist the programmer in creating custom image data providers that support annotations, two abstract helper classes are provided within the ImageGear21.Web.Services assembly (see Helper Abstract Classes in ImageGear21.Web.Services Assembly).