Comments on: WikiBench: Persistence http://www.chrishowie.com/2007/05/25/wikibench-persistence/ Trading social skills for technical prowess since 1994 Tue, 06 Jan 2009 10:59:02 +0000 http://wordpress.org/?v=2.7 hourly 1 By: Jonathan Pryor http://www.chrishowie.com/2007/05/25/wikibench-persistence/comment-page-1/#comment-740 Jonathan Pryor Sat, 26 May 2007 02:21:38 +0000 http://www.chrishowie.com/2007/05/25/wikibench-persistence/#comment-740 IXPathNavigable.CreateNavigator() returns a System.Xml.XPath.XPathNavigator instance. Under .NET 2.0, you can use XPathNavigator's InnerXml and OuterXml properties, as well as obtain access to an XmlWriter for inserting arbitrary XML via the AppendChild(), AppendChildElement(), CreateAttribute(), ReplaceRange(), InsertAfter(), InsertBefore(), PrependChild(), etc. methods. The XPathNavigator.CanEdit property lets you know if editing is supported. It is by XmlDocument-backed XPathNavigators, but is not by XPathDocument-backed XPathNavigators. IXPathNavigable.CreateNavigator() returns a System.Xml.XPath.XPathNavigator instance. Under .NET 2.0, you can use XPathNavigator’s InnerXml and OuterXml properties, as well as obtain access to an XmlWriter for inserting arbitrary XML via the AppendChild(), AppendChildElement(), CreateAttribute(), ReplaceRange(), InsertAfter(), InsertBefore(), PrependChild(), etc. methods.

The XPathNavigator.CanEdit property lets you know if editing is supported. It is by XmlDocument-backed XPathNavigators, but is not by XPathDocument-backed XPathNavigators.

]]> By: Chris http://www.chrishowie.com/2007/05/25/wikibench-persistence/comment-page-1/#comment-739 Chris Fri, 25 May 2007 22:32:55 +0000 http://www.chrishowie.com/2007/05/25/wikibench-persistence/#comment-739 For read access I can see this, but how would this design allow an addin to modify the tree when saving state? For read access I can see this, but how would this design allow an addin to modify the tree when saving state?

]]> By: Jonathan Pryor http://www.chrishowie.com/2007/05/25/wikibench-persistence/comment-page-1/#comment-736 Jonathan Pryor Fri, 25 May 2007 15:14:12 +0000 http://www.chrishowie.com/2007/05/25/wikibench-persistence/#comment-736 Just a point worth mentioning... The .NET Framework Design Guidelines suggest _not_ exposting XmlDocument/etc. from public members (e.g. property types, method parameters). Instead, use System.Xml.XPath.IXPathNavigable. This is implemented by XmlDocument, so you can still use XmlDocument as the backing store, but it doesn't _require_ XmlDocument as the backing store; any other data structure could be used in the future. This permits more flexibility for versioning purposes and future changes. Just a point worth mentioning…

The .NET Framework Design Guidelines suggest _not_ exposting XmlDocument/etc. from public members (e.g. property types, method parameters). Instead, use System.Xml.XPath.IXPathNavigable. This is implemented by XmlDocument, so you can still use XmlDocument as the backing store, but it doesn’t _require_ XmlDocument as the backing store; any other data structure could be used in the future.

This permits more flexibility for versioning purposes and future changes.

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