通过 VB6 读取多个 XML 文件 [英] Reading multiple XML Files via VB6

问题描述

我必须将多个巨大的 xml 数据文件导入 Excel.我不能使用简单的 loadXML() 函数，因为 Excel 没有足够的可用 RAM.(一些 xml 文件约为 100mb)

I gotta import multiple huge xml data files into Excel. I cannot use the simple loadXML() function since Excel doesn't have enough RAM available. (some of the xml files are ~100mb)

现在我真的尝试了很多......但根本无法真正实现它.示例 XML 文件:

Now I've really tried out a lot... But couldn't really make it happen at all. Example XML File:

<OMDS xmlns="urn:omds20" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:omds20 ./omds24-00.xsd">
   <PAKET VUNr="1" MaklerID="2" PaketZpktErstell="x" PaketZpktLetztErstell="y">
      <PROVISION ProvisionsID="123" Polizzennr="321" Vermnr="5" BuchDat="2013-02-27"/>
      <PROVISION ProvisionsID="456" Polizzennr="321" Vermnr="5" BuchDat="2013-02-27"/>
      <PROVISION ProvisionsID="789" Polizzennr="321" Vermnr="5" BuchDat="2013-02-27"/>
   </PAKET>
</OMDS>

所以我在 VBA 中的内容是这样的:

So what I have in VBA is something like that:

Sub ParseXmlDocument()
 Dim doc As New MSXML2.DOMDocument
 Dim success As Boolean

 success = doc.Load(App.Path & "	est.xml")
 If success = False Then
    MsgBox doc.parseError.reason
 Else
   Dim nodeList As MSXML2.IXMLDOMNodeList

   Set nodeList = doc.selectNodes("/OMDS/PAKET/PROVISION")

   If Not nodeList Is Nothing Then
     Dim node As MSXML2.IXMLDOMNode
     Dim idAs String
     Dim value As String

     For Each node In nodeList
        id= node.selectSingleNode("ProvisionsID").Text
     Next node
   End If
  End If
End Sub

之后我只是想在 MsgBox 中打印 ID，但由于 nodeList 总是显示为空，我无法实现.

After that I'm just trying to Print the ID within a MsgBox, but since the nodeList always appears to be empty, I can't make it happen.

希望有人可以帮助我.

感谢 GSerg，我能够解决问题.解决方案

Thanks to GSerg i was able to solve the problem. Here the Solution

Sub ParseXmlDocument()
    Dim doc As New MSXML2.DOMDocument
    Dim success As Boolean

  With doc
    .async = False
    .setProperty "SelectionLanguage", "XPath"
    .setProperty "SelectionNamespaces", "xmlns:t='urn:omds20'"
  End With

  success = doc.Load("C:...demo.xml")

 If success = False Then
    MsgBox doc.parseError.reason
 Else

 Dim nodeList As MSXML2.IXMLDOMNodeList
 Set nodeList = doc.SelectNodes("/t:OMDS/t:PAKET/t:PROVISION")

   If Not nodeList Is Nothing Then
     Dim node As MSXML2.IXMLDOMNode
     Dim id As String
     Dim value As String

   For Each node In nodeList


    id = node.SelectSingleNode("@ProvisionsID").Text
   Next node
  End If
 End If
End Sub

推荐答案

您的源 XML 包含命名空间，但您的 xPath 查询不包含.因此，xPath 将寻找具有空命名空间的节点，而您没有任何命名空间.

Your source XML contains namespaces, but your xPath query does not. So the xPath will be looking for nodes with empty namespace, and you don't have any.

为了修复它，您需要在 xPath 查询中提供命名空间.执行此操作的方法因使用的 XML 库而异.对于 MSXML，您需要在 DOMDocument设置 SelectionNamespaces 属性> 对象以包含您的命名空间和前缀:

In order to fix it you need to provide a namespace in your xPath query. Ways to do that differ based on the XML library used. For MSXML, you need to set the SelectionNamespaces property on the DOMDocument object to include your namespace with a prefix:

doc.setProperty("SelectionNamespaces", "xmlns:t='urn:omds20'")

然后更改您的查询以使用该前缀:

And then change your query to use that prefix:

Set nodeList = doc.selectNodes("/t:OMDS/t:PAKET/t:PROVISION")

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