A detailed introduction to how to use XML data source objects in web design
黄舟
Release： 2017-03-07 16:14:28
Original
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The xml data source object is an ActiveX control that allows you to manipulate data between XML files and HTML pages. This article will show you how to extract data from various XML data sources and how to display this data using JavaScript.
XML Data Source Object DSO is a Microsoft ActiveX control, built on Microsoft IE4 and later versions. This object allows you to extract the content of an external XML file or embedded HTML file into an HTML page.
You can use XML in a Web page - DSO selects content from an external XML file, extracts XML data from the XML embedded in the Web page, and then uses Javascript to manipulate the data. However, it is not recommended to use this object on the Internet, because DSO can only work in browsers above MSIE 4, so this may cause some compatibility issues. Therefore, it is very appropriate to use XML-DSO in the intranet.
Start
To initialize the XML-DSO object, we use the
CLSID:550dda30-0541-11d2-9ca9-0060b0ec3d39
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This ID uniquely identifies XML-DSO. Use the following code to initialize this control in a Web page:
Although most objects require many parameters to be associated with them, XML-DSO does not require any parameters.
Extracting data using an XML data island
First, include an XML data island by using the tag. Second, assign it an ID, xmldb -- for later use. The data is actually extracted using HTML tags: , ,
, etc. The code in Listing 1 uses the tag. The datasrc attribute specifies the data island from which you want to extract data. The datafld attribute specifies the XML markup of the data you want. So, the first extracts the name, and the second extracts the gender.
Note that this code does not initialize an XML-DSO object. This is because the use of XML data islands has implicitly created one. The output should be:
Premshree Pillai
male
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Note that there are two and tags in the XML data island. Using this method, you can only extract the first instance of these tags. The code in Listing 2 uses the
Message URL
JavaScript Ticker using XML DSO http://someURL.com
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上面的脚本非常特殊化。下面给出一个更一般的脚本：
＜script language="JavaScript"＞
var xmlDso;
function load(xmlFile, objName) {
eval('xmlDso='+objName+'.XMLDocument');
xmlDso.load(xmlFile);
}
＜/script＞
Now, to load any XML file use:
load("SomeXMLFile.xml","anyXmlDsoObject");
＜!-- example4.htm --＞
＜html＞
＜head＞
＜title＞XML DSO-example4.htm＜/title＞
＜script language="JavaScript"＞
function load() {
var xmlDso=myDB.XMLDocument;
xmlDso.load("example4.xml");
/* Get the complete record set */
var memberSet=myDB.recordset;
/* Go to next data */
memberSet.moveNext();
}
＜/script＞
＜/head＞
＜body bgcolor="#FFFFFF" onLoad="load()"＞
＜object id="myDB" CLASSID="clsid:550dda30-0541-11d2-9ca9-0060b0ec3d39"
width="0" height="0"＞＜/object＞
＜span datasrc="#myDB" datafld="name"＞＜/span＞
＜/body＞
＜/html＞
＜!-- example4.htm --＞
＜html＞
＜head＞
＜title＞XML DSO-example4.htm＜/title＞
＜script language="JavaScript"＞
function load() {
var xmlDso=myDB.XMLDocument;
xmlDso.load("example4.xml");
/* Get the complete record set */
var memberSet=myDB.recordset;
/* Go to next data */
memberSet.moveNext();
}
＜/script＞
＜/head＞
＜body bgcolor="#FFFFFF" onLoad="load()"＞
＜object id="myDB" CLASSID="clsid:550dda30-0541-11d2-9ca9-0060b0ec3d39"
width="0" height="0"＞＜/object＞
＜span datasrc="#myDB" datafld="name"＞＜/span＞
＜/body＞
＜/html＞
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