Applied XML Programming for Microsoft .NET.pdf - Csbdu.in

however, the verbosity of XML patently wins over the compactness of binary data. As aresult, the size of the final stream is often unacceptably large. You must resort to trickssuch as the ghost class discussed in Chapter 9 to overcome this difficulty.As for the data format, you can choose between the stateless ADO.NET normal form,the DiffGram format, and the DiffGram with a schema. In the first case, you take asnapshot of the current data, disregarding original values, ongoing changes, andpending row errors. The DiffGram format is stateful and maintains a history of thechanges and pending errors. Unfortunately, the DiffGram format does not includeschema information. Schema information is fundamental for constructing a DataSetobject from XML data. By using the XML serializer class, you obtain a new XML formatin which schema and DiffGram data are grouped under a common umbrella.Incidentally, XML serializers are the topic of Chapter 11.Further ReadingIn my book Building Web Solutions with ASP.NET and ADO.NET (Microsoft Press,2002), I devoted Chapter 7 to disconnected applications and batch updates. In thatchapter, I discuss save-and-resume applications from the Web perspective. A widercoverage of disconnected ADO.NET can be found in Francesco Balena's ProgrammingVisual Basic .NET (Microsoft Press, 2002) and David Sceppa's Microsoft ADO.NETCore Reference (Microsoft Press, 2002). Both books will more than get you started, sodeciding which works better for you is more of a matter of personal preference. If youwant to focus on ADO.NET, go for Sceppa's book; if you want to look at ADO.NET as apart of the larger .NET Framework, pick up Balena's book.Data binding is a key enhancement in the .NET Framework. Although based on ashared model such as ADO.NET, data binding is implemented in radically differentways in Windows Forms and Web Forms applications. Insights into Windows Formsdata binding can be found in the following Microsoft Developer Network (MSDN)articles: http://msdn.microsoft.com/library/en-us/dndive/html/data06132002.asp andhttp://msdn.microsoft.com/msdnmag/issues/02/02/cutting/cutting0202.asp.386