Windows8WinRT XML数据API

Windows8WinRT XML数据API

(2013-01-15 13:24:19)

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//添加CDATA节点数据至XML文件

<?xml version="1.0" encoding="UTF-8" ?>

<rss version="2.0">

    <channel>

        <title>Pay Less For More</title>

        <link>http://paylessformore</link>

        <description>Pay Less For More Homepage</description>

        <content>

        </content>

    </channel>

</rss>

        public async Task<XmlDocument> LoadXmlFile(String folder, String file)

        {

            StorageFolder storageFolder = await Package.Current.InstalledLocation.GetFolderAsync(folder);

            StorageFile storageFile = await storageFolder.GetFileAsync(file);

            XmlLoadSettings loadSettings = new XmlLoadSettings();

            loadSettings.ProhibitDtd = false;

            loadSettings.ResolveExternals = false;

            return await XmlDocument.LoadFromFileAsync(storageFile, loadSettings);

        }

                try

                {

                    var xmlDoc = new XmlDocument();

                    xmlDoc.LoadXml(xml);

                    var element = xmlDoc.getElementsByTagName_r("content").Item(0);

                    String rss = scenario1RssInput.Text;

                    var cdata = xmlDoc.CreateCDataSection(rss);// create a rss CDataSection and insert into DOM tree

                    element.A(cdata);

                }

                catch (Exception exp)

                {

   Debug.WriteLine(exp.Message);

                }

//Mark HotProducts

<?xml version="1.0" encoding="utf-8"?>

<products>

    <product id="DVD-001" title="Toy story 3" hot="0">

        <price>12.99</price>

        <InStore>35</InStore>

        <Sell10day>33</Sell10day>

    </product>

    <product id="DVD-002" title="The Blind Side" hot="0">

        <price>15.99</price>

        <InStore>12</InStore>

        <Sell10day>48</Sell10day>

    </product>

</products>

            try

            {

                var doc = new XmlDocument();

                doc.LoadXml(xml);

                // Mark 'hot' attribute to '1' if 'Sell10day' is greater than 'InStore'

                var xpath = "/products/product[Sell10day>InStore]/@hot";

                var hotAttributes = doc.SelectNodes(xpath);

                for (uint index = 0; index < hotAttributes.Length; index++)

                {

                    hotAttributes.Item(index).NodeValue = "1";

                }

            }

            catch (Exception exp)

            {

   Debug.WriteLine(exp.Message);

            }

//XPath Query

<?xml version="1.0" encoding="utf-8"?>

<employees>

    <employee>

        <name>Micheal Jackson</name>

        <department>Customer Support</department>

        <startyear>2004</startyear>

    </employee>

    <employee>

        <name>Anni Wang</name>

        <department>Business Partner</department>

        <startyear>2009</startyear>

    </employee>

    <employee>

        <name>Sail Young</name>

        <department>Consulting</department>

        <startyear>2000</startyear>

    </employee>

</employees>

            var doc = new XmlDocument();

            doc.LoadXml(xml);

            var thisYear = 2012;

            var previousOneYear = thisYear - 1;

            var previousFiveYear = thisYear - 5;

            var previousTenYear = thisYear - 10;

            //方式一

            var xpath = new String[3];

            // select >= 1 year and < 5 years

            xpath[0] = "descendant::employee[startyear <= " + previousOneYear + " and startyear > " + previousFiveYear + "]";

            // select >= 5 years and < 10 years

            xpath[1] = "descendant::employee[startyear <= " + previousFiveYear + " and startyear > " + previousTenYear + "]";

            // select >= 10 years

            xpath[2] = "descendant::employee[startyear <= " + previousTenYear + "]";

            var Gifts = new String[3] { "Gift Card", "XBOX", "Windows Phone" };

            var output = new StringBuilder();

            for (uint i = 0; i < 3; i++)

            {

                var employees = doc.SelectNodes(xpath[i]);

                for (uint index = 0; index < employees.Length; index++)

                {

                    var employeeName = employees.Item(index).SelectSingleNode("descendant::name");

                    var department = employees.Item(index).SelectSingleNode("descendant::department");

                    output.AppendFormat("[{0}]/[{1}]/[{2}]\n", employeeName.FirstChild.NodeValue, department.FirstChild.NodeValue, Gifts[i]);

                }

            }

            //方式二

            //var xpath = new String[3];

            //// select >= 1 year and < 5 years

            //xpath[0] = "/employees/employee[startyear <= " + previousOneYear + " and startyear > " + previousFiveYear + "]";

            //// select >= 5 years and < 10 years

            //xpath[1] = "/employees/employee[startyear <= " + previousFiveYear + " and startyear > " + previousTenYear + "]";

            //// select >= 10 years

            //xpath[2] = "/employees/employee[startyear <= " + previousTenYear + "]";

            //var Gifts = new String[3] { "Gift Card", "XBOX", "Windows Phone" };

            //var output = new StringBuilder();

            //for (uint i = 0; i < 3; i++)

            //{

            //    var employees = doc.SelectNodes(xpath[i]);

            //    for (uint index = 0; index < employees.Length; index++)

            //    {

            //        var employeeName = employees.Item(index).SelectSingleNode("name");

            //        var department = employees.Item(index).SelectSingleNode("department");

            //        output.AppendFormat("[{0}]/[{1}]/[{2}]\n", employeeName.FirstChild.NodeValue, department.FirstChild.NodeValue, Gifts[i]);

            //    }

            //}