The Art of SQL Server FILESTREAM - Red Gate Software

Chapter 5: FILESTREAM with ASP.NET and Silverlightthe project, select Add | New Item… | Interface) with the name IItemData. At the topof the code file, import the System.IO and System.ServiceModel namespaces. Thedefinition of the IItemData interface is shown in Listing 5-17.[ServiceContract()]Public interface IItemData{[OperationContract()]MemoryStream GetItemImage(string itemID);}Listing 5-17:IItemData interface definition.We now need to modify the DataAccess.ItemData class to implement this newinterface. First, add a reference to the new ServiceInterfaces project in the DataAccessproject. Then, modify the definition of the ItemData class as shown in Listing 5-18. Nochange is required, other than to write the interface name, because the ItemData classalready implicitly has a GetItemImage() method with the correct signature.Public class ItemData : ServiceInterfaces.IItemData{/* Other code ommitted for brevity */}Listing 5-18:ItemData class implements IItemData interface.Creating the WCF service hostFor this basic lab, we will self-host a WCF service in a console application. In a real-worldscenario, you might consider creating a Windows Service or hosting the WCF serviceunder IIS.212