зеркало из https://github.com/xamarin/ios-samples.git
81 строка
3.2 KiB
C#
81 строка
3.2 KiB
C#
//
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// RssParser.cs
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//
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// Author:
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// Alan McGovern <alan@xamarin.com>
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//
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// Copyright 2011, Xamarin Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System;
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using System.Linq;
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using System.Xml.Linq;
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using System.Collections.Generic;
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namespace LazyTableImages {
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public static class RssParser {
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// These are used to select the correct nodes and attributes from the Rss feed
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static readonly XName FeedElement = XName.Get ("feed", "http://www.w3.org/2005/Atom");
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static readonly XName EntryElement = XName.Get ("entry", "http://www.w3.org/2005/Atom");
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static readonly XName AppUrlElement = XName.Get ("id", "http://www.w3.org/2005/Atom");
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static readonly XName AppNameElement = XName.Get ("name", "http://itunes.apple.com/rss");
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static readonly XName ArtistElement = XName.Get ("artist", "http://itunes.apple.com/rss");
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static readonly XName ImageUrlElement = XName.Get ("image", "http://itunes.apple.com/rss");
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static readonly XName HeightAttribute = XName.Get ("height", "");
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public static List<App> Parse (string xml)
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{
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// Open the xml
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var doc = XDocument.Parse (xml);
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// We want to convert all the raw Xml nodes called 'entry' which
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// are in that namespace into instances of the 'App' class so they
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// can be displayed easily in the table.
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return doc.Element (FeedElement) // Select the 'feed' node.
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.Elements (EntryElement) // Select all children with the name 'entry'.
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.Select (XmlElementToApp) // Convert the 'entry' nodes to instances of the App class.
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.ToList (); // Return as a List<App>.
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}
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static App XmlElementToApp (XElement entry)
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{
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// The document may contain many image nodes. Select the one with
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// the largest resolution.
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var imageUrlNode = entry.Elements (ImageUrlElement)
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.Where (n => n.Attribute (HeightAttribute) != null)
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.OrderBy (node => int.Parse (node.Attribute (HeightAttribute).Value))
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.LastOrDefault ();
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// Parse the rest of the apps information from the XElement and
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// return the App instance.
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return new App {
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Name = entry.Element (AppNameElement).Value,
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Url = new Uri (entry.Element (AppUrlElement).Value),
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Artist = entry.Element (ArtistElement).Value,
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ImageUrl = new Uri (imageUrlNode.Value)
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};
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}
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}
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}
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