将子条目添加到vbscipt中xml文件中的特定节点

Question

我有一个带有此条目的xml文件DataConfiguration.xml

<DataSource>
 <localdata>
    <add context="Localization">
       <parameter name="timeout" type="int" defaultvalue="60"/>
       <parameter name="address" type="string" defaultvalue="192.168.9.45" />
       <parameter name="port" type="int" defaultvalue="6789"/>
    </add>
</localdata>
</DataSource>

我需要在"localdata"中添加另一个条目,这样就可以了

 <DataSource>
     <localdata>
        <add context="Localization">
           <parameter name="timeout" type="int" defaultvalue="60"/>
           <parameter name="address" type="string" defaultvalue="192.168.9.45" />
           <parameter name="port" type="int" defaultvalue="6789"/>
        </add>
       <add context="General">
           <parameter name="timeout" type="int" defaultvalue="60"/>
           <parameter name="address" type="string" defaultvalue="192.168.9.478" />
           <parameter name="port" type="int" defaultvalue="5674"/>
        </add>
    </localdata>
    </DataSource>

我如何在vbscript中添加它？

我的当前代码

'created xml file object
Set xmlDoc = CreateObject("Msxml2.DOMDocument")

xmlDoc.async = False  
xmlDoc.preserveWhiteSpace= True 
xmlDoc.load("DataConfiguration.xml")

Dim entry

entry = "<add context=""General"">" & _
               <parameter name=""timeout"" type=""int"" defaultvalue=""60""/>" & _ 
               <parameter name=""address"" type=""string"" defaultvalue=""192.168.9.478"" />" & _
               <parameter name=""port"" type=""int"" defaultvalue=""5674""/>"& _
            </add>"

Set NewNode = xmlDoc.createElement(entry)
Set ElemList = xmlDoc.getElementsByTagName("localdata")
ElemList.appendChild(NewNode)

但这会给出错误

此名称在"Set NewNode = xmlDoc.createElement(entry)"中不能包含<character"

此外,ElemList.appendChild(NewNode)不起作用.

Answer 1

XmlDocument.CreateElement接受三个参数:节点类型,节点名称和命名空间.在您的示例中,由于您的子元素名为"add",因此它是一个元素(type == 1),它是您调用的全局xml命名空间的一部分xmlDoc.CreateElement(1, "add", "").

这给了你一个空元素.要插入所需的数据(Context="General"属性和所有子元素),您需要连续调用DOM操作方法,添加每个子元素,每个属性等等.非常费力.

但是您已经将xml片段作为字符串.因此,您可以使用DOM方法创建第二个XmlDocument,并告诉它从字符串中获取其内容,而不是使用DOM方法创建元素.然后从第二个doc获取documentElement.然后在第一个doc中的相应节点上调用appendChild,从第二个doc传递documentElement.

这样的事情:

Function GetElementFromXmlString(xmlString)
    Dim doc
    set doc = CreateObject("Msxml2.DOMDocument.6.0")
    doc.async = False
    doc.preserveWhiteSpace= False
    doc.loadXML(xmlString)
    Set GetElementFromXmlString = doc.documentElement
End Function

Sub Main()
    Set doc1 = CreateObject("Msxml2.DOMDocument.6.0")
    doc1.async = False
    doc1.preserveWhiteSpace= False ' True
    doc1.load("DataConfiguration.xml")

    ' generate an Element from an XML string
    Dim xmlString
    xmlString = "<add context=""General"">" & _
                  " <parameter name=""timeout"" type=""int"" defaultvalue=""60""/>" & _
                  " <parameter name=""address"" type=""string"" defaultvalue=""192.168.9.478"" />" & _
                  " <parameter name=""port"" type=""int"" defaultvalue=""5674""/>"& _
              "</add>"
    Dim newElt
    Set newElt = GetElementFromXmlString(xmlString)

    ' get the first child node of type=Element under the document root element in
    ' doc1.  This is not the same as  doc1.documentElement.firstChild.  There can
    ' be text nodes, etc.
    Dim node1
    Set node1 = doc1.documentElement.selectSingleNode("./*[position()=1]")

    ' append the element to the node
    node1.appendChild(newElt)

    WScript.echo (PrettyPrintXml (doc1))
End Sub

Main()

...其中PrettyPrintXml函数的定义如下:

Function PrettyPrintXml(xmldoc)
    Dim reader
    set reader = CreateObject("Msxml2.SAXXMLReader.6.0")
    Dim writer
    set writer = CreateObject("Msxml2.MXXMLWriter.6.0")
    writer.indent = True
    writer.omitXMLDeclaration = True
    reader.contentHandler = writer
    reader.putProperty "http://xml.org/sax/properties/lexical-handler", writer
    reader.parse(xmldoc)
    PrettyPrintXml = writer.output
End Function

对我来说,这个输出是:

<DataSource>
  <localdata>
    <add context="Localization">
      <parameter name="timeout" type="int" defaultvalue="60"/>
      <parameter name="address" type="string" defaultvalue="192.168.9.45"/>
      <parameter name="port" type="int" defaultvalue="6789"/>
    </add>
    <add context="General">
      <parameter name="timeout" type="int" defaultvalue="60"/>
      <parameter name="address" type="string" defaultvalue="192.168.9.478"/>
      <parameter name="port" type="int" defaultvalue="5674"/>
    </add>
  </localdata>
</DataSource>