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Html file:
Copy codeThe Code is as follows:
<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Title> add, delete, modify, and query js operations in Xml (under IE) </title>
<Script type = "text/javascript"> <! --
/* And other issues solved:
1. What layer does xpath locate? For example, root level or person or name level.
*/
Var xmlDoc;
Var rootNode; // Root Node
// Load the Xml document
Function loadXml (){
Try {
XmlDoc = new ActiveXObject ("Microsoft. XMLDOM ");
XmlDoc. async = false; // disable asynchronous loading
XmlDoc. load ("XmlFile. xml"); // load is from file, loadXML is from string.
RootNode = xmlDoc.doc umentElement;
} Catch (e) {alert (e. message )}
}
// Display Xml documents in memory
Function outXml (){
Var divXml = document. getElementById ("divXml ");
DivXml. innerHTML = xmlDoc. xml; // display xml content. The trick is to add an xml suffix .?
Alert (xmlDoc. xml );
}
// Add
Function addXml (){
// Set the text value for the leaf node
Var newName = xmlDoc. createElement ("name ");
NewName. text = "crane ";
Var newGender = xmlDoc. createElement ("gender ");
NewGender. text = "female ";
// Parent node, with appendChild (childNode );
Var newPerson = xmlDoc. createElement ("person ");
// Set the property id
NewPerson. setAttribute ("id", "2 ");
NewPerson. appendChild (newName );
NewPerson. appendChild (newGender );
// Add to the root node
RootNode. appendChild (newPerson );
Alert (xmlDoc. xml );
}
// Delete
Function deleteXml (){
// Locate the node first
Var singleNode = xmlDoc. selectSingleNode ("/root/person [name = 'tree']");
// Find the parent and delete it.
SingleNode. parentNode. removeChild (singleNode );
Alert (xmlDoc. xml );
}
// Modify
Function updateXml (){
Var singleNode = xmlDoc. selectSingleNode ("/root/person [name = 'crane ']");
SingleNode. childNodes [0]. text = "updated ";
Alert (xmlDoc. xml );
}
// Query
Function queryXml (){
// Alert (rootNode. nodeName); // node name
// Alert (rootNode. text); // all content in the node
// Select the node Array Using xPath
// Var nodes = xmlDoc. selectNodes ("/root/person ");
// Alert (nodes [0]. text );
// Select a single node
/* Summary
1. "/root/person [name = 'tree ']" is equivalent to "/root [person/name = 'tree']", that is, the person node is found.
*/
Var singleNode = xmlDoc. selectSingleNode ("/root/person [gender = 'female']"); // The value must be enclosed in quotation marks.
Alert (singleNode. text );
Alert (singleNode. getAttribute ("id "));
// Test xpath Positioning
Var sglNode = xmlDoc. selectSingleNode ("/root [person/gender = 'male']"); // The location is not clear here. study again.
Alert (sglNode. text );
// Display all xml documents
// Alert (xmlDoc. xml );
}
// --> </Script>
</Head>
<Body>
<Div id = "divXml"> </div>
<Input type = "button" value = "load" onclick = "loadXml ();"/>
<Input type = "button" value = "show" onclick = "outXml ();"/>
<Input type = "button" value = "add" onclick = "addXml ();"/>
<Input type = "button" value = "delete" onclick = "deleteXml ();"/>
<Input type = "button" value = "update" onclick = "updateXml ();"/>
<Input type = "button" value = "query" onclick = "queryXml ();"/>
</Body>
</Html>
Xml file:
Copy codeThe Code is as follows:
<? Xml version = "1.0" encoding = "UTF-8"?>
<Root>
<Person id = "1">
<Name> tree </name>
<Gender> male </gender>
</Person>
</Root>
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