XmlDataSource.XPath Property
Assembly: System.Web (in system.web.dll)
/** @property */ public String get_XPath () /** @property */ public void set_XPath (String value)
public function get XPath () : String public function set XPath (value : String)
Property Value
A string that represents an XPath expression that can be used to filter the data contained by the Data property or by the XML file indicated by the DataFile property. The default value is String.Empty.For more information on XPath data-binding expressions, see Binding a Tabular Control to the XmlDataSource Control.
| Topic | Location |
|---|---|
| Walkthrough: Creating a Web Page to Display XML Data | Building ASP .NET Web Applications in Visual Studio |
| Walkthrough: Displaying an XML Document in a Web Forms Page Using Transformations | Building ASP .NET Web Applications in Visual Studio |
The following code example demonstrates how to use an XmlDataSource control with a templated Repeater control to display XML data that has been filtered using an XPath expression. In this example, XPath syntax is used to filter the XML data when the XPath property of the data source control is set, and also binds elements of the Repeater control template to the XML data.
<%@ Page Language="VJ#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<HTML>
<BODY>
<form runat="server">
<asp:XmlDataSource
id="XmlSource"
DataFile="bookstore.xml"
runat="server"
XPath="bookstore/genre[@name='fiction']"/>
<asp:Repeater
DataSourceID="XmlSource"
runat="server">
<ItemTemplate>
<h1><%# XPath ("book/title") %></h1>
<b>Price:</b>
<%# XPath ("book/price") %>
</ItemTemplate>
</asp:Repeater>
</form>
</BODY>
</HTML>
The XML file in the code example has the following data:
<bookstore>
<genre name="fiction">
<book ISBN="0000000000">
<title>Secrets of Silicon Valley</title>
<price>12.95</price>
<chapters>
<chapter num="1" name="Introduction" />
<chapter num="2" name="Body" />
<chapter num="3" name="Conclusion" />
</chapters>
</book>
</genre>
<genre name="novel">
<book genre="novel" ISBN="1111111111">
<title>Straight Talk About Computers</title>
<price>24.95</price>
<chapters>
<chapter num="1" name="Introduction" />
<chapter num="2" name="Body" />
<chapter num="3" name="Conclusion" />
</chapters>
</book>
</genre>
</bookstore>
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.