tailieunhanh - XML Features in ADO.NET

XML and some of its related technologies, including XPath, XSL Transformation, and XML Schema, are unquestionably at the foundation of . As a matter of fact, XML constitutes the key element for the greatly improved interoperability of the object model when compared to ADO. In ADO, XML was merely an (nondefault) I/O format used to persist the content of a disconnected recordset. The participation of XML in the building and in the inter -workings of is much deeper. The aspects of where the interaction and the. | XML Features in Page 1 of 8 XML Features in Dino Esposito Wintellect December 13 2001 XML and some of its related technologies including XPath XSL Transformation and XML Schema are unquestionably at the foundation of . As a matter of fact XML constitutes the key element for the greatly improved interoperability of the object model when compared to ADO. In ADO XML was merely an nondefault I O format used to persist the content of a disconnected recordset. The participation of XML in the building and in the inter-workings of is much deeper. The aspects of where the interaction and the integration with XML is stronger can be summarized in the following points Objects serialization and remoting A dual programming interface XML-driven batch update for SQL Server 2000 only In you have several options to save objects to and restore objects from XML documents. To say it all this ability belongs to one object only the DataSet but can be extended to other container objects with minimal coding. Saving objects like DataTable and DataView to XML is substantially seen as a special case of the DataSet serialization. Furthermore and XML classes provide for a sort of unified intermediate API that is made available to programmers through a dual and synchronized programming interface. You can access and update data using either the hierarchical and node-based approach of XML or the relational approach of column-based tabular data sets. At any time you can switch from a DataSet representation of the data to XMLDOM and vice versa. Data is synchronized and any change you enter in either model is immediately reflected and visible in the other. In this article I ll cover serialization and XML data access that is the first two points in the list above. Next month I ll attack XML-driven batch update one of the coolest features you get from SQL Server 2000 XML Extensions SQLXML . DataSet and XML Just like any .