C#(5):XSLT可扩展样式表语言转换 System.Xml.Xsl、XslCompiledTransform类
XML文件
books.xml:
xml version="1.0" encoding="utf-8" ?>
<bookstore>
<book genre="autobiography" publicationdate="1991" ISBN="1-861003-11-0">
<title>The Autobiography of Benjamin Franklin</title>
<author>
<first-name>Benjamin</first-name>
<last-name>Franklin</last-name>
</author>
<price>8.99</price>
</book>
<book genre="novel" publicationdate="1967" ISBN="0-201-63361-2">
<title>The Confidence Man</title>
<author>
<first-name>Herman</first-name>
<last-name>Melville</last-name>
</author>
<price>11.99</price>
</book>
<book genre="philosophy" publicationdate="1991" ISBN="1-861001-57-6">
<title>The Gorgias</title>
<author>
<name>Plato</name>
</author>
<price>9.99</price>
</book>
</bookstore>
一、转为html文档
1、xsl文件
books.xsl:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/"> <HTML> <head> <title>Price List</title> </head> <body> <table> <xsl:apply-templates/> </table> </body> </HTML> </xsl:template> <xsl:template match="bookstore"> <xsl:apply-templates select="book"/> </xsl:template> <xsl:template match="book"> <tr> <td> <xsl:value-of select="title"/> </td> <td> <xsl:value-of select="price"/> </td> </tr> </xsl:template> </xsl:stylesheet>
2、转换
将books.xml按照books.xsl定义的格式转换成out.html
XslCompiledTransform trans = new XslCompiledTransform(); trans.Load(@"..\..\books.xsl"); trans.Transform(@"..\..\books.xml", "out.html");
3、结果
out.html:
<HTML> <head> <META http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Price List</title> </head> <body> <table> <tr> <td>The Autobiography of Benjamin Franklin</td> <td>8.99</td> </tr> <tr> <td>The Confidence Man</td> <td>11.99</td> </tr> <tr> <td>The Gorgias</td> <td>9.99</td> </tr> </table> </body> </HTML>
二、转为xml文档
1、prices.xsl
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:myObj="urn:price-conv"> Price conversion factor <xsl:param name="conv" select="1.15"/> <xsl:template match="bookstore"> <bookstore> <xsl:for-each select="book"> <book> <xsl:copy-of select="node()"/> <new-price> <xsl:value-of select="myObj:NewPriceFunc(./price, $conv)"/> </new-price> </book> </xsl:for-each> </bookstore> </xsl:template> </xsl:stylesheet>
2、转换XsltArgumentList.AddExtensionObject
在以下示例中,样式表使用 XSLT 扩展对象要转换的书籍价格。
using System; using System.IO; using System.Xml; using System.Xml.XPath; using System.Xml.Xsl; public class Sample { public static void Main() { // Create the XslCompiledTransform and load the stylesheet. XslCompiledTransform xslt = new XslCompiledTransform(); xslt.Load("prices.xsl"); // Create an XsltArgumentList. XsltArgumentList xslArg = new XsltArgumentList(); // Add an object to calculate the new book price. BookPrice obj = new BookPrice(); xslArg.AddExtensionObject("urn:price-conv", obj); using (XmlWriter w = XmlWriter.Create("output.xml")) { // Transform the file. xslt.Transform("books.xml", xslArg, w); } } // Convert the book price to a new price using the conversion factor. public class BookPrice{ private decimal newprice = 0; public decimal NewPriceFunc(decimal price, decimal conv){ decimal tmp = price*conv; newprice = decimal.Round(tmp, 2); return newprice; } } }
3、结果
output.xml
三 、调用XSL参数
1、xml文件
order.xml
Represents a customer order <order> <book ISBN='10-861003-324'> <title>The Handmaid's Tale</title> <price>19.95</price> </book> <cd ISBN='2-3631-4'> <title>Americana</title> <price>16.95</price> </cd> </order>
2、order.xsl
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:param name="date"/> <xsl:template match="/"> <order> <date><xsl:value-of select="$date"/></date> <total><xsl:value-of select="sum(//price)"/>total> </order> </xsl:template> </xsl:stylesheet>
3、转换
下面的示例使用AddParam方法来创建表示当前日期和时间的参数。
using System; using System.IO; using System.Xml; using System.Xml.Xsl; public class Sample { public static void Main() { // Create the XslCompiledTransform and load the stylesheet. XslCompiledTransform xslt = new XslCompiledTransform(); xslt.Load("order.xsl"); // Create the XsltArgumentList. XsltArgumentList xslArg = new XsltArgumentList(); // Create a parameter which represents the current date and time. DateTime d = DateTime.Now; xslArg.AddParam("date", "", d.ToString()); // Transform the file. using (XmlWriter w = XmlWriter.Create("output.xml")) { xslt.Transform("order.xml", xslArg, w); } } }
四、使用 XML 控件
有时候你可能希望把带有其他内容的转换后的 HTML 输出和 Web 控件组合在一起,XML 控件在页面独立的部分显示 XSL 转换后的结果:
ID="Xml1" runat="server" DocumentSource="DvdList.xml" TransformSource="DvdList.xslt">
注意: 你也可以用编码中XmlDocument 对象赋给 Document 属性,或者把一个包含 XML 内容的字符串赋给 DocumentContent 属性,而不是使用 DocumentSource 属性。类似的,你可以一个 XslTransform 对象值赋给 Transform 属性来提供 XSLT 信息。
posted on 2020-05-14 16:40 springsnow 阅读(361) 评论(0) 编辑 收藏 举报