ASP.NET XML/XSL Transforms(转载www.aspalliance.com)

新客网 XKER.COM 2003-07-12 来源： 收藏本文

Transforming an XML document using XSL/T and outputting the results to the browser is a fairly simple task in ASP.NET. The following user control demonstrates the ease with which this can be accomplished. This user control has a parameter for the XML source(xmlSource), and a parameter for the XSL source(xslSource). When placing this user control on a page, simply specify both values (using relative paths, since they are Server.MapPath'ed within the user control) and you're done! The transformed result will be output to Response.Output and sent to the user's browser. You can use this to create a two line ASPX file that simply uses this user control to render its output. By using Output and/or Fragment caching, you can ensure that the CPU load required to transform the XML is minimized.

<%@ Control Language="c#" %>
<%@ Import Namespace="System.Xml" %>
<%@ Import Namespace="System.Xml.Xsl" %>
<%@ Import Namespace="System.Xml.XPath" %>
<script runat="server" language="c#">
public string xmlSource, xslSource;
void Page_Load(){
    XmlDocument docXml = new XmlDocument();
    docXml.Load(Server.MapPath(xmlSource));
    XslTransform docXsl = new XslTransform();
    docXsl.Load(Server.MapPath(xslSource));
    docXsl.Transform(docXml,null,Response.Output);
//    chapter.Text = docXml.TransformNode(docXsl);
}
</script>

An example of a page using this user control, Output Caching for 1 minute:

<%@Page%>
<%@ Register TagPrefix="authors" tagname="chapters" src="/controls/chapters.ascx"%>
<%@ OutputCache Duration="60" VaryByParam="none" %>
<authors:chapters id="chapters" runat="server"
    xmlSource="chapter.xml" xslSource="chapter.xsl" />

To test this out, you can use the following two files:

chapter.xml
<chapter>
    <!-- Chapter Name -->
    <name>Chapter Name</name>
    
    <!-- Author -->
    <author>
        <name>Steven Smith</name>
        <email>ssmith@aspalliance.com</email>
        <website>http://aspalliance.com/stevesmith/</website>
    </author>
    
    <!-- Examples from Chapter -->
    <examples>
    
        <example>
            <!-- The number from the book, e.g. 2.3 -->
            <reference>2.1</reference>
            
            <!-- Link to working example -->
            <demo>
                <url>hellovb.asp</url>
                <link_text>HelloVB.asp</link_text>
            </demo>
            
            <!-- Link to source code -->
            <source>
                <url>hellovb.txt</url>
                <link_text>HelloVB.asp source</link_text>
            </source>
            
            <!-- Description of the example -->
            <description>Hello World using Classic ASP.</description>
        </example>
        
    </examples>

</chapter>


chapter.xsl
<?xml version="1.0" ?>
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

<xsl:output method="xml" />

<xsl:template match="/">
    <p>
   <xsl:apply-templates select="chapter" />
   </p>
</xsl:template>

<xsl:template match="/chapter" >
    <b><xsl:value-of select="name"/></b>
   <br/>
   by <xsl:apply-templates select="author" />
   <br/><br/>
   <xsl:apply-templates select="examples" />
</xsl:template>

<xsl:template match="author" >
    <i><xsl:value-of select="name"/></i>
</xsl:template>

<xsl:template match="examples" >
    <table bgcolor="#000033">
        <tr bgcolor="#CCCCFF">
            <th>Reference</th>
            <th>Demo</th>
            <th>Source</th>
            <th>Description</th>
        </tr>
        <xsl:apply-templates select="example" />
    </table>
</xsl:template>

<xsl:template match="example" >
    <tr bgcolor="#DDDDDD">
        <td><xsl:value-of select="reference"/></td>
        <td>
            <a>
                <xsl:attribute name="href">
                    <xsl:value-of select="demo/url"/>
                </xsl:attribute>
                <xsl:value-of select="demo/link_text"/>
            </a>
        </td>
        <td>
            <a>
                <xsl:attribute name="href">
                    <xsl:value-of select="source/url"/>
                </xsl:attribute>
                <xsl:value-of select="source/link_text"/>
            </a>
        </td>
        <td><xsl:value-of select="description"/></td>
    </tr>
</xsl:template>



</xsl:transform>

• ·身份证函数 查看身份证地区信息
• ·VS2008 第一次安装心得及使用
• ·ASP.NET 2.0跨网页提交的三法
• ·编程实例 WebGroupBox(Aspx控件)
• ·asp.net mvc脚手架代码生成工具
• ·用独立的DLL来存储图片(资源文件)
• ·ASP.NET中多国语言的实现方法
• ·实例 .net生成静态页方法总结
• ·ASP.NET控件学习笔记之ViewState
• ·用递归在TreeView价节点
• ·经验总结 关于.NET 中的Event机制
• ·.NET应用程序开发标准化(z)
• ·在DataTable中查询应该注意的问题
• ·LINQ 中调用存储过程自动绑定列名
• ·如何用.NET技术在线生成网站LOGO
• ·对于访问IIS元数据库失败的解决