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<h1>ASP .NET - XML Files</h1>
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<p class="intro">We can bind an XML file to a list control.</p>
<hr />
<h2>Examples</h2>
<p><a target="_blank" href="showasp.asp@filename=demo_xml_radio1">Example 1 -
XML RadiobuttonList</a></p>
<hr />
<h2>An XML File</h2>
<p>Here is an XML file named "countries.xml":</p>
<table class="ex" border="1" width="100%">
<tr><td>
<pre><?xml version="1.0" encoding="ISO-8859-1"?></pre>
<pre><countries></pre>
<pre><country>
<text>Norway</text>
<value>N</value>
</country></pre>
<pre><country>
<text>Sweden</text>
<value>S</value>
</country></pre>
<pre><country>
<text>France</text>
<value>F</value>
</country></pre>
<pre><country>
<text>Italy</text>
<value>I</value>
</country></pre>
<pre></countries></pre>
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<p>Take a look at the XML file: <a target="_blank" href="countries.xml">countries.xml</a></p>
<hr />
<h2>Bind a DataSet to a List Control</h2>
<p>First, import the "System.Data"
namespace. We need this namespace to work with DataSet objects. Include the
following directive at the top of an .aspx page:</p>
<table class="ex" border="1" width="100%">
<tr><td>
<pre><%@ Import Namespace="System.Data" %></pre>
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<p>Next, create a DataSet for the XML file and load the XML file into the DataSet when the page is first loaded:</p>
<table class="ex" border="1" width="100%">
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<pre><script runat="server">
sub Page_Load
if Not Page.IsPostBack then
dim mycountries=New DataSet
mycountries.ReadXml(MapPath("countries.xml"))
end if
end sub</pre>
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<p>To bind the DataSet to a RadioButtonList control, first create a RadioButtonList control (without
any asp:ListItem elements) in an .aspx page:</p>
<table class="ex" border="1" width="100%">
<tr><td>
<pre><html>
<body></pre>
<pre><form runat="server">
<asp:RadioButtonList id="rb" runat="server"
AutoPostBack="True" /><br /></form></pre>
<pre></body>
</html></pre>
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<p>Then add the script that builds the XML DataSet:</p>
<table class="ex" border="1" width="100%">
<tr><td>
<pre><%@ Import Namespace="System.Data" %></pre>
<pre><script runat="server">
sub Page_Load
if Not Page.IsPostBack then
dim mycountries=New DataSet
mycountries.ReadXml(MapPath("countries.xml"))
rb.DataSource=mycountries
rb.DataValueField="value"
rb.DataTextField="text"
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