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

Consider the following attribute value, in which the entity character
denotes alinefeed character:Let's try to read the AuthorDisplayName attribute using the XmlTextReader parserwhen the normalization is off. The following code shows how:reader.Normalization = false;reader.Read();Console.WriteLine(reader["AuthorDisplayName"]);In the resulting string, the linefeed is preserved, and the output in the console windowlooks like this:DinoEspositoConversely, if you read the attribute when Normalization is set to true, the line-feed isreplaced with a blank, and the output looks like this:Dino EspositoHandling XML ExceptionsThe XML reader throws an exception whenever it encounters a parsing error in theXML source. The reader makes use of the XmlException class to return detailedinformation about the last parsing error. Ad hoc information includes the line number,the character position, and a text description. LinePosition and LineNumber, shownhere, are the members that differentiate the XmlException class from the basic .NETException class:public class XmlException : SystemException{int LinePosition;int LineNumber;}Although you can still catch XML parsing and validation exceptions through the basicException class, catching them through XmlException gives you more information andthe certainty that the error relates only to the code handling XML data.NoteIf you have multiple XML documents in a single stream to parse insequence, you can still use the same instance of the reader.However, prior to attacking a new stream, you must reset theinternal state of the reader. The XmlTextReader class specificallydefines a method, named ResetState, that simply resets the state ofthe reader to ReadState.Initial.ResetState resets all the properties to their default values, with afew exceptions. Normalization, XmlResolver, andWhitespaceHandling are not affected by the state reset.Handling White SpacesIn XML, white spaces are a special type of node. White spaces found in the body of anXML document can be classified in two groups: significant and insignificant. A white35