Mega Code Archive
Querying XML with XPathDocument and XPathNodeIterator (C#)
<![CDATA[
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Xml;
using System.Xml.XPath;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string booksFile = Path.Combine(Request.PhysicalApplicationPath, "Data.xml");
XPathDocument document = new XPathDocument(booksFile);
XPathNavigator nav = document.CreateNavigator();
XmlNamespaceManager namespaceMgr = new XmlNamespaceManager(nav.NameTable);
namespaceMgr.AddNamespace("b", "http://example.books.com");
foreach (XPathNavigator node in nav.Select("//b:book[not(b:price[. > 10.00])]/b:price",namespaceMgr))
{
Decimal price = (decimal)node.ValueAs(typeof(decimal));
Response.Write(String.Format("Price is {0}<BR/>", price));
}
}
}
File: Data.xml
<?xml version='1.0'?>
<bookstore xmlns="http://example.books.com"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<book genre="A"
publicationdate="1981"
ISBN="1-11111-11-0">
<title>title 1</title>
<author>
<first-name>A</first-name>
<last-name>B</last-name>
</author>
<price>8</price>
</book>
<book genre="B"
publicationdate="1999"
ISBN="0-222-22222-2">
<title>title 2</title>
<author>
<first-name>C</first-name>
<last-name>D</last-name>
</author>
<price>11.99</price>
</book>
</bookstore>
]]>