1.新建一個(gè)vs2003的web工程,取名為XMLTest
2.將工程目錄下的WebForm1.aspx中內(nèi)容全部刪除，只留下頂部的一條語句：
<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="XMLTest.WebForm1" %>
3.修改WebForm1.aspx.cs中內(nèi)容，在Page_Load中加入:
XmlDocument doc=new XmlDocument();
String xmlfile=string.Empty;
xmlfile=Context.Request.PhysicalApplicationPath+(Request.QueryString["sel"].ToString()=="xml"?"\\hello.xml":"\\hello.xsl");
doc.Load(xmlfile);
Response.Write(doc.InnerXml);
4.在工程根目錄下新增test.htm,并設(shè)為工程首頁:
<html>
<head>
<title></title>
</head>
<body>
<div id="resTree"></div>
<FONT face="宋體"></FONT><input type="button" value="執(zhí)行" onclick="GetXml()"><BR>
<script language="JScript">
var srcTree,xsltTree,xt;
var http_request = false;
function GetXml()
{
srcTree = new ActiveXObject("Msxml2.FreeThreadedDOMDocument");
srcTree.async=false;
xsltTree= new ActiveXObject("Msxml2.FreeThreadedDOMDocument");
xsltTree.async = false;
xt=new ActiveXObject("MSXML2.XSLTemplate");
resTree.innerHTML="";
makeRequest("WebForm1.aspx?sel=xml",GetXml_CB);
}
function makeRequest(url,callback) {
http_request = false;
if (window.XMLHttpRequest) { // Mozilla, Safari,...
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) {
http_request.overrideMimeType('text/xml');
}
} else if (window.ActiveXObject) { // IE
try {
http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!http_request) {
alert('Giving up :( Cannot create an XMLHTTP instance');
return false;
}
http_request.onreadystatechange = callback;
http_request.open('GET', url, true);
http_request.send(null);
}
function GetXml_CB() {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
srcTree.loadXML(http_request.responseText);
makeRequest("WebForm1.aspx?sel=xsl",GetXsl_CB);
} else {
alert('There was a problem with the request.');
}
}
}
function GetXsl_CB(){
if (http_request.readyState == 4) {
if (http_request.status == 200) {
xsltTree.loadXML(http_request.responseText);
xt.stylesheet=xsltTree;
var proc=xt.createProcessor();
proc.input=srcTree;
proc.transform();
resTree.innerHTML=proc.output;
} else {
alert('There was a problem with the request.');
}
}
}
function makeRequest(url,callback) {
http_request = false;
if (window.XMLHttpRequest) { // Mozilla, Safari,...
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) {
http_request.overrideMimeType('text/xml');
}
} else if (window.ActiveXObject) { // IE
try {
http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!http_request) {
alert('Giving up :( Cannot create an XMLHTTP instance');
return false;
}
http_request.onreadystatechange = callback;
http_request.open('GET', url, true);
http_request.send(null);
}
</script>
</body>
</html>
5.運(yùn)行工程，看看效果吧!
hello.xml(注意:我的xml文檔中并沒有指定對(duì)應(yīng)的xsl解析文件名)
<?xml version='1.0'?>
<breakfast-menu>
<food>
<name>Belgian Waffles</name>
<price>5.95</price>
<description>Two of our famous Belgian Waffles
with plenty of real maple syrup.</description>
<calories>650</calories>
</food>
<food>
<name>Strawberry Belgian Waffles</name>
<price>7.95</price>
<description>Light Belgian waffles covered with
strawberries and whipped cream.</description>
<calories>900</calories>
</food>
<food>
<name>Berry-Berry Belgian Waffles</name>
<price>8.95</price>
<description>Light Belgian waffles covered
with an assortment of fresh berries
and whipped cream.</description>
<calories>900</calories>
</food>
<food>
<name>French Toast</name>
<price>4.50</price>
<description>Thick slices made from our homemade
sourdough bread.</description>
<calories>600</calories>
</food>
<food>
<name>Homestyle Breakfast</name>
<price>6.95</price>
<description>Two eggs, bacon or sausage, toast,
and our ever-popular hash browns.</description>
<calories>950</calories>
</food>
</breakfast-menu>
hello.xsl
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/breakfast-menu">
<xsl:for-each select="food">
<DIV STYLE="background-color:teal; color:white; padding:4px">
<SPAN STYLE="font-weight:bold; color:white"><xsl:value-of select="name"/></SPAN>
至 <xsl:value-of select="price"/>
</DIV>
<DIV STYLE="margin-left:20px; margin-bottom:1em; font-size:10pt">
<xsl:value-of select="description"/>
<SPAN STYLE="font-style:italic">
<xsl:value-of select="calories"/> 嘿嘿
</SPAN>
</DIV>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
xml文檔只有純粹的數(shù)據(jù)，如果需要顯示到html頁面中的話，一般需要使用定制的xsl文檔來解析，或者手工通過js來讀取xml中的值顯示到html中的dom樹中，當(dāng)使用xsl文檔來解析時(shí)，相應(yīng)的xml文檔中必須指定對(duì)應(yīng)的xsl文檔才能正常顯示，但當(dāng)有些程序動(dòng)態(tài)輸出xml文檔時(shí)，并沒有指定相應(yīng)的xsl文檔，這時(shí)就必須通過其它途徑來加載相應(yīng)的xsl文檔來解析，當(dāng)然，在服務(wù)器端輸出xml文檔時(shí)，通過一些xml api也可以實(shí)現(xiàn)，我這兒描述的是通過js來實(shí)現(xiàn)的一種方式。用這種方式的話，就拋開了服務(wù)器平臺(tái)的限制，服務(wù)器端只需要輸出相應(yīng)的xml文檔(.net/j2ee都可以)，并且將對(duì)應(yīng)的xsl文檔輸出給客戶端（可以輸出流或直接在客戶端加載xsl文檔)。
這里有幾個(gè)需要注意的地方，我們一般是使用Msxml2.Document組件來加載xml文檔的，但當(dāng)動(dòng)態(tài)使用xsl解析xml文檔時(shí)，必須使用Msxml2.FreeThreadedDOMDocument這種自由線程的組件，同時(shí)使用MSXML2.XSLTemplate模板組件來加載xml,xsl數(shù)據(jù)，通過MSXML2.XSLTemplate的transform方法，就可以動(dòng)態(tài)的用xsl來解析xml數(shù)據(jù)了,另外，IE5開始，系統(tǒng)默認(rèn)的xml組件是msxml2，如果需要使用更新的msxml組件需要安裝更新的msxml組件包，并指定新的名稱，例如Msxml2.FreeThreadedDOMDocument.4.0，現(xiàn)在最新的msxml組件是6.0beta，可在M網(wǎng)站下載。
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