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什么是MSXML

浏览量：作者：阿牛来源：博客园

MSXML是微软非托管代码栈中最为核心的XML服务集合，不但适合基于COM的开发应用，更是微软AJAX解决方案和客户端XSLT解决方案的核心组件。

安装后会在c:\windows\system32\目录下,如:msxml6.dll

测试代码:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<HTML><HEAD><META content="IE=5.0000" http-equiv="X-UA-Compatible">

<TITLE>XML Evaluator</TITLE>

<META content="text/html; charset=utf-8" http-equiv=Content-Type>

<STYLE type=text/css>.xml_source {

    FONT-FAMILY: "Lucida Console"; FONT-WEIGHT: bold

}

.output {

    BACKGROUND-COLOR: #ffffff; FONT-FAMILY: "Lucida Console", font-weight: bold; COLOR: #000000; FONT-SIZE: 16px

}

</STYLE>

<SCRIPT language=JavaScript>

var area_obj;

var timer_enabled = false;

var xml;

var xinput;

var output;

var htmloutput;

var old_xml = "";

var old_xinput = "";

var old_type = "";

var old_parser = "";

var old_nsdef = "";

var saved_xpath = "";

var saved_xsl = "";

var saved_xsd = "";

var saved_xdr = "";

var xmldoc;

var xinputdoc;

var schemas;

function init()

{

  xml = document.getElementById("xml");

  xinput= document.getElementById("xinput");

  output = document.getElementById("output");

  htmloutput = document.getElementById("htmloutput");

  nsdef =  document.getElementById("nsdef")

  document.getElementById("default_xpath").style.visibility = 'hidden';

  document.getElementById("default_xsl").style.visibility = 'hidden';

  document.getElementById("default_xsd").style.visibility = 'hidden';

  document.getElementById("default_xdr").style.visibility = 'hidden';

  saved_xpath = document.getElementById("default_xpath").value;

  saved_xsl = document.getElementById("default_xsl").value;

  saved_xsd = document.getElementById("default_xsd").value;

  saved_xdr = document.getElementById("default_xdr").value;

  eval_xml();

}

function get_type()

{

  for (var i=0; i < document.main_form.type.length; i++)

  {

    if (document.main_form.type[i].checked)

      {

        return document.main_form.type[i].value;

      }

  }

  return "XPath";

}

function get_parser()

{

  for (var i=0; i < document.main_form.parser.length; i++)

  {

    if (document.main_form.parser[i].checked)

      {

        return document.main_form.parser[i].value;

      }

  }

  return "MSXML6";

}

function loadComponents()

{

  var parser = get_parser();

  switch(parser)

  {

  case "MSXML3":

    xmldoc = new ActiveXObject("MSXML2.DOMDocument.3.0");

    xinputdoc = new ActiveXObject("MSXML2.DOMDocument.3.0");

    xmldoc.schemas = new ActiveXObject("MSXML2.XMLSchemaCache.3.0");

    break;

  case "MSXML4":

    xmldoc = new ActiveXObject("MSXML2.DOMDocument.4.0");

    xinputdoc = new ActiveXObject("MSXML2.DOMDocument.4.0");

    xmldoc.schemas = new ActiveXObject("MSXML2.XMLSchemaCache.4.0");

    break;

  default:

    xmldoc = new ActiveXObject("MSXML2.DOMDocument.6.0");

    xinputdoc = new ActiveXObject("MSXML2.DOMDocument.6.0");

    xmldoc.schemas = new ActiveXObject("MSXML2.XMLSchemaCache.6.0");

  }

}

function eval_xml()

{

  if (old_xml == xml.value && old_xinput == xinput.value && old_type == get_type() && old_parser == get_parser() && old_nsdef == nsdef.value)

  {

    return; // do not evaluate if both xml and xsl are not changed at all

  }

  loadComponents();

  switch(old_type)

  {

  case "XPath":

      saved_xpath = xinput.value;

      break;

  case "XSLT":

      saved_xsl = xinput.value;

      break;

  case "Schema":

      saved_xsd = xinput.value;

      break;

  case "XDR":

      saved_xdr = xinput.value;

      break;

  }

  old_xml = xml.value;

  old_xinput = xinput.value;

  old_parser = get_parser();

  if(old_type != get_type())

  {

    old_type = get_type();

    switch(old_type)

    {

    case "XPath":

      xinput.value = saved_xpath;

      break;

    case "XSLT":

      xinput.value = saved_xsl;

      break;

    case "Schema":

      xinput.value = saved_xsd;

      break;

    case "XDR":

      xinput.value = saved_xdr;

      break;

    }

  }

  if(old_type == "Schema" && old_parser == "MSXML3")

  {

    output.style.color = "#000000";

    output.value = "";

    htmloutput.style.color = "#FF0000"

    htmloutput.innerHTML = "(error):MSXML3 doesn't support Schema, use XDR instead.";

    return;

  } else if(old_type == "XDR" && old_parser != "MSXML3") {

    output.style.color = "#000000";

    output.value = "";

    htmloutput.style.color = "#FF0000"

    htmloutput.innerHTML = "(error):XDR is only supported in MSXML3.";

    return;

  }

  htmloutput.innerHTML = "Processing " + old_type + " on " + old_parser + " ";

  xmldoc.validateOnParse=false;

  xmldoc.setProperty("ProhibitDTD",false);

  xmldoc.loadXML(xml.value);

  if (xmldoc.parseError != 0)

  {

    xml.style.color = "#FF0000";

    output.value = "";

    htmloutput.style.color = "#FF0000"

    htmloutput.innerHTML = "(xml error):" + xmldoc.parseError.reason;

    return;

  }

  if(nsdef.value != "")

  {

    xmldoc.setProperty("SelectionNamespaces", nsdef.value.replace("\n", " "));

//  xmldoc.setProperty("SelectionLanguage", "XPath"); //break MSXML3

  }

  xml.style.color = "#000000";

  xinput.style.color = "#000000";

  output.style.color = "#000000";

  htmloutput.style.color = "#000000";

  switch(old_type)

  {

  case "XPath":

    evaluate_xpath(xmldoc, xinput, output, htmloutput);

    break;

  case "XSLT":

    evaluate_xsl(xmldoc, xinput, output, htmloutput);

    break;

  case "Schema":

  case "XDR":

    evaluate_xsd(xml, xinput, output, htmloutput);

    break;

  }

}

function evaluate_xpath(doc, x, o, h)

{

  try

  {

    o.value = "";

    var elements = doc.selectNodes(x.value);

    if (elements.length>0)

    {

      h.style.color = "#000000";

      var s = "";

      for (var i=0; i<elements.length; i++)

      {

        o.value += get_node_value(elements.item(i)) + "\n";

        ss = s + "<p class='output'>" + get_node_path(elements.item(i)) + "</p>";

      }

      h.innerHTML = s;

    }

    else

    {

      o.value = "";

      h.style.color = "#C0C0C0"

      h.innerHTML = "(no ouput)";

    }

  }

  catch (e)

  {

    o.value = "";

    h.style.color = "#FF0000";

    h.innerHTML = "(xpath error):" + e.message;

  }

}

function evaluate_xsl(doc, x, o, h)

{

  xinputdoc.loadXML(x.value);

  o.value = "";

  if (xinputdoc.parseError != 0)

  {

    x.style.color = "#FF0000";

    h.style.color = "#FF0000"

    h.innerHTML = "(xsl error):" + xinputdoc.parseError.reason;

    return;

  }

  try

  {

    var outstr = doc.transformNode(xinputdoc);

    if (outstr.length>0)

    {

      o.value = outstr;

      h.innerHTML = outstr;

    }

    else

    {

      o.value = "";

      h.style.color = "#C0C0C0";

      h.innerHTML = "(no output)";

    }

  }

  catch (e)

  {

    o.value = "";

    h.style.color = "#FF0000";

    h.innerHTML = "(xslt error):" + e.message;;

  }

}

function evaluate_xsd(xml, x, o, h)

{

  o.value="";

  xinputdoc.setProperty("ProhibitDTD",false);

  xinputdoc.resolveExternals = true;

  xinputdoc.loadXML(x.value);

  if (xinputdoc.parseError != 0)

  {

    x.style.color = "#FF0000";

    h.style.color = "#FF0000";

    h.innerHTML = "(xsd error):" + xinputdoc.parseError.reason;

    return;

  }

  try{

    var targetNS = xmldoc.childNodes[0].namespaceURI;

    xmldoc.schemas.add(targetNS, xinputdoc);

  }catch(se){

    h.style.color = "#FF0000";

    h.innerHTML = "(schema error):" + se.description;

    return;

  }

  var vError = xmldoc.validate();

  if (vError.reason == "")

  {

    h.style.color = "#000000";

    h.innerHTML = "Validation success";

  }

  else

  {

    h.style.color = "#FF0000";

    h.innerHTML = "(validation error):" + vError.reason;

  }

}

function get_node_path(n)

{

  var s = "/";

  var pn = n.parentNode;

  while (pn!=null && pn.nodeName!="#document")

  {

    s = "/" + pn.nodeName + s;

    pnpn = pn.parentNode;

  }

  s = "<b>" + n.nodeTypeString + "</b>: " + s + "<b>" + get_node_string(n) + " = " + get_node_value(n) + "</b>";

  return s;

}

function get_node_string(n)

{

  var t = n.nodeType;

  if (t == 2)

    return "@" + n.nodeName;

  else

    return n.nodeName;

}

function get_node_value(n)

{

  var t = n.nodeType;

  var s;

  if (t == 1)

  {

    s = n.text;

  }

  else

  {

    s = n.nodeValue;

  }

  if (s==null || s=="")

    s = "[empty]";

  return s;

}

function enable_area_timer(o)

{

  timer_enabled = true;

  setTimeout("timer_handler()", 500);

}

function disable_area_timer(o)

{

  timer_enabled = false;

}

function timer_handler()

{

  if (timer_enabled)

  {

    eval_xml();

    setTimeout("timer_handler()", 500);

  }

}

</SCRIPT>

</HEAD>

<BODY onload=init()>

<FORM name="main_form" action=#>

<TABLE border=0 cellSpacing=0 cellPadding=2 cols=3 rows="4">

  <TBODY>

  <TR>

  <TD>

    <H2>MSXML Evaluator</H2>

  </TD>

  <TD valign="top">Functinality

      <input type="radio" name="type" value="XPath" onclick="javascript:eval_xml()" checked>XPath 1.0</input>

      <input type="radio" name="type" value="XSLT" onclick="javascript:eval_xml()">XSLT 1.0</input>

      <input type="radio" name="type" value="Schema" onclick="javascript:eval_xml()">Schema 1.0</input>

      <input type="radio" name="type" value="XDR" onclick="javascript:eval_xml()">XDR</input>

      <BR/>Component

      <input type="radio" name="parser" value="MSXML3" onclick="javascript:eval_xml()">MSXML 3.0</input>

      <input type="radio" name="parser" value="MSXML4" onclick="javascript:eval_xml()">MSXML 4.0</input>

      <input type="radio" name="parser" value="MSXML6" checked onclick="javascript:eval_xml()">MSXML 6.0</input>

  </TD>

  <TD valign="top">

    <B>Namespaces for XPath</B><BR/><TEXTAREA style="COLOR: #000000" id="nsdef" class=xml_source onfocus=enable_area_timer() onblur=disable_area_timer() onchange=eval_xml() rows=3 cols=40 name="ns_def">

xmlns:ms='http://www.microsoft.com'</TEXTAREA>

  </TD>

  </TR>

  <TR>

    <TD vAlign=top width="25%">

      <H3>XML Content</H3><TEXTAREA onblur=disable_area_timer() style="COLOR: #000000" id=xml class=xml_source onfocus=enable_area_timer() rows=45 onchange=eval_xml() cols=40 name=xml_data>

<library xmlns="http://www.microsoft.com">

  <book>

    <chapter></chapter>

    <chapter>

      <section>

        <paragraph a="b">1</paragraph>

        <paragraph a="b">2</paragraph>

      </section>

    </chapter>

  </book>

</library></TEXTAREA>

      <BR/>

      Used for all functions.

    </TD>

    <TD vAlign=top width="30%" align=left>

        <H3>XPath/XSL/Schema</H3>

        <TEXTAREA onblur=disable_area_timer() style="COLOR: #000000" id=xinput class=xml_source onfocus=enable_area_timer() rows=45 onchange=eval_xml() cols=50 name=x_data></TEXTAREA>

        <BR/>

        Change will be remembered in memory when you switch to another function.

    </TD>

    <TD vAlign=top width="30%" align=left>

    <table>

    <tr><td>

        <H3>Result</H3>

        <TEXTAREA onblur=disable_area_timer() style="COLOR: #000000" id=output class=xml_source onfocus=enable_area_timer() rows=25 onchange=eval_xml() cols=40 name=output_data>

        </TEXTAREA>

        </td></tr>

        <tr><td>

  <h3>HTML Output</h3>

  <div id="htmloutput"></div>

        </td></tr>

    </table>

    </TD>

  </TR>

</TBODY></TABLE></FORM>

<TEXTAREA id="default_xpath">

/ms:library/ms:book/ms:chapter/ms:section/ms:paragraph/@a</TEXTAREA>

<TEXTAREA id="default_xsl">

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0" xmlns:m="http://www.microsoft.com">

<xsl:template match="/">

<html><body><table>

    <tr>

    <td>Attribute</td>

    <td>Value</td>

    </tr>

    <xsl:for-each select="m:library/m:book/m:chapter/m:section/m:paragraph">

    <tr>

    <td><xsl:value-of select="@a"/></td>

    <td><xsl:value-of select="."/></td>

    </tr>

    </xsl:for-each>

</table></body></html>

</xsl:template>

</xsl:stylesheet></TEXTAREA>

<TEXTAREA id="default_xsd">

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.microsoft.com" elementFormDefault="qualified">

<xs:element name="library">

<xs:complexType>

<xs:sequence maxOccurs="unbounded">

<xs:element name="book">

  <xs:complexType>

  <xs:sequence maxOccurs="unbounded">

  <xs:element name="chapter">

    <xs:complexType>

    <xs:sequence minOccurs="0" maxOccurs="unbounded">

    <xs:element name="section">

      <xs:complexType>

      <xs:sequence maxOccurs="unbounded">

      <xs:element name="paragraph">

        <xs:complexType>

        <xs:simpleContent>

        <xs:extension base="xs:integer">

          <xs:attribute name="a" type="xs:string" />

        </xs:extension>

        </xs:simpleContent>

        </xs:complexType>

      </xs:element>

      </xs:sequence>

      </xs:complexType>

    </xs:element>

    </xs:sequence>

    </xs:complexType>

  </xs:element>

  </xs:sequence>

  </xs:complexType>

</xs:element>

</xs:sequence>

</xs:complexType>

</xs:element>

</xs:schema></TEXTAREA>

<TEXTAREA id="default_xdr">

<Schema xmlns="urn:schemas-microsoft-com:xml-data">

  

  <AttributeType name="a"/>

  <ElementType name="paragraph">

    <attribute type="a"/>

  </ElementType>

  <ElementType name="section" model="closed">

    <element type="paragraph"/>

  </ElementType>

  <ElementType name="chapter" model="closed">

    <element type="section"/>

  </ElementType>

  <ElementType name="book" model="closed">

    <element type="chapter"/>

  </ElementType>

  <ElementType name="library" model="closed">

    <element type="book"/>

  </ElementType>

</Schema></TEXTAREA>

<TABLE align="center">

<TR>

<TD>

    <B>Created by: MSXML Team. All rights reserved. © 2009 Microsoft. </B>

</TD>

</TR>

</TABLE>

</BODY></HTML>

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