/// <summary> /// Loads this <see cref="FeedHistoryLinkRelation"/> using the supplied <see cref="XPathNavigator"/>. /// </summary> /// <param name="source">The <see cref="XPathNavigator"/> to extract information from.</param> /// <returns><b>true</b> if the <see cref="FeedHistoryLinkRelation"/> was initialized using the supplied <paramref name="source"/>, otherwise <b>false</b>.</returns> /// <remarks> /// This method expects the supplied <paramref name="source"/> to be positioned on the XML element that represents a <see cref="FeedHistoryLinkRelation"/>. /// </remarks> /// <exception cref="ArgumentNullException">The <paramref name="source"/> is a null reference (Nothing in Visual Basic).</exception> public bool Load(XPathNavigator source) { bool wasLoaded = false; Guard.ArgumentNotNull(source, "source"); if (source.HasAttributes) { string hrefAttribute = source.GetAttribute("href", String.Empty); string relAttribute = source.GetAttribute("rel", String.Empty); if (!String.IsNullOrEmpty(hrefAttribute)) { Uri href; if (Uri.TryCreate(hrefAttribute, UriKind.RelativeOrAbsolute, out href)) { this.Uri = href; wasLoaded = true; } } if (!String.IsNullOrEmpty(relAttribute)) { FeedHistoryLinkRelationType relationType = FeedHistorySyndicationExtension.LinkRelationTypeByName(relAttribute); if (relationType != FeedHistoryLinkRelationType.None) { this.RelationType = relationType; wasLoaded = true; } } } return(wasLoaded); }
/// <summary> /// Initializes the syndication extension context using the supplied <see cref="XPathNavigator"/>. /// </summary> /// <param name="source">The <b>XPathNavigator</b> used to load this <see cref="FeedHistorySyndicationExtensionContext"/>.</param> /// <param name="manager">The <see cref="XmlNamespaceManager"/> object used to resolve prefixed syndication extension elements and attributes.</param> /// <returns><b>true</b> if the <see cref="FeedHistorySyndicationExtensionContext"/> was able to be initialized using the supplied <paramref name="source"/>; otherwise <b>false</b>.</returns> /// <exception cref="ArgumentNullException">The <paramref name="source"/> is a null reference (Nothing in Visual Basic).</exception> /// <exception cref="ArgumentNullException">The <paramref name="manager"/> is a null reference (Nothing in Visual Basic).</exception> public bool Load(XPathNavigator source, XmlNamespaceManager manager) { bool wasLoaded = false; Guard.ArgumentNotNull(source, "source"); Guard.ArgumentNotNull(manager, "manager"); if (String.IsNullOrEmpty(manager.LookupNamespace("atom"))) { manager.AddNamespace("atom", "http://www.w3.org/2005/Atom"); } if (source.HasChildren) { XPathNavigator archiveNavigator = source.SelectSingleNode("fh:archive", manager); XPathNavigator completeNavigator = source.SelectSingleNode("fh:complete", manager); XPathNodeIterator linkIterator = source.Select("atom:link", manager); if (archiveNavigator != null) { this.IsArchive = true; wasLoaded = true; } if (completeNavigator != null) { this.IsComplete = true; wasLoaded = true; } if (linkIterator != null && linkIterator.Count > 0) { while (linkIterator.MoveNext()) { string relAttribute = linkIterator.Current.GetAttribute("rel", String.Empty); if (!String.IsNullOrEmpty(relAttribute) && FeedHistorySyndicationExtension.LinkRelationTypeByName(relAttribute) != FeedHistoryLinkRelationType.None) { FeedHistoryLinkRelation relation = new FeedHistoryLinkRelation(); if (relation.Load(linkIterator.Current)) { this.Relations.Add(relation); wasLoaded = true; } } } } } return(wasLoaded); }