在解析其他节点的数据时，如何为可能并不总是属于其父节点的节点创建循环？
假设您有一个非常大的文件，其中包含其中几个项目，但为了简单起见，我们使用此 XML（请注意，第一个“book id”没有我们想要的节点，因此我们的循环已经失败）：
<?xml version="1.0"?>
<catalog>
<book id="Adventure" ISBN="00113" version="13">
<author>Ralls, Kim</author>
<title>XML Developer's Guide</title>
<price>44.95</price>
<misc>
<editor id="9B">
<editorBrand>Partial Edit</editorBrand>
<editorEmphasis>Minimal</editorEmphasis>
</editor>
</misc>
</book>
<book id="Adventure" ISBN="00114" version="14">
<author>Ralls, Kim</author>
<title>Midnight Rain</title>
<price>5.95</price>
<misc>
<Publisher id="5691">
<PublisherLocation>Los Angeles</PublisherLocation>
</Publisher>
<PublishedAuthor id="Ralls">
<StoreLocation>Store A/8</StoreLocation>
<seriesTitle>AAA</seriesTitle>
<store id="8">
<copies>26</copies>
</store>
</misc>
</book>
<book id="Adventure" ISBN="00115" version="14">
<author>Ralls, Kim</author>
<title>Mist</title>
<price>15.95</price>
<misc>
<Publisher id="8101">
<PublisherLocation>New Mexico</PublisherLocation>
</Publisher>
<PublishedAuthor id="Ralls">
<StoreLocation>Market C/13</StoreLocation>
<seriesTitle>BBB</seriesTitle>
<store id="9">
<copies>150</copies>
</store>
<store id="13">
<copies>60</copies>
</store>
</PublishedAuthor>
</misc>
</book>
<book id="Mystery" ISBN="00116" version="13">
<author>Bill, Simmons</author>
<title>NBA Insider</title>
<price>16.99</price>
<misc>
<editor id="11N">
<editorBrand>Full Edit</editorBrand>
<editorEmphasis>Full</editorEmphasis>
</editor>
</misc>
</book>
</catalog>
我们的VBA代码：
Sub mySub()
Dim XMLFile As Variant
Dim seriesTitle As Variant
Dim series As String, Author As String, Title As String, StoreLocation As String
Dim ISBN As String, copies As String, storelc As String
Dim seriesArray() As String, AuthorArray() As String, BookTypeArray() As String, TitleArray() As String
Dim StoreLocationArray() As String, ISBNArray() As String, copiesArray() As String
Dim i As Long, x As Long, j As Long, pn As Object, loc As Object, arr, ln As String, loc2 As Object
Dim mainWorkBook As Workbook
Dim n As IXMLDOMNode
Set mainWorkBook = ActiveWorkbook
Set XMLFile = CreateObject("Microsoft.XMLDOM")
XMLFile.Load ("C:\Books.xml")
XMLFile.setProperty "SelectionLanguage", "XPath"
x = 1
j = 0
Set seriesTitle = XMLFile.SelectNodes("/catalog/book/misc/PublishedAuthor/seriesTitle")
For i = 0 To (seriesTitle.Length - 1)
series = seriesTitle(i).Text
storelc = seriesTitle(i).SelectSingleNode("store/copies").Text
If series = "AAA" Or series = "BBB" Then
Set pn = seriesTitle(i).ParentNode
StoreLocation = pn.getElementsByTagName("StoreLocation").Item(0).nodeTypedValue
Author = pn.ParentNode.ParentNode.getElementsByTagName("author").Item(0).nodeTypedValue
Title = pn.ParentNode.ParentNode.getElementsByTagName("title").Item(0).nodeTypedValue
ISBN = pn.ParentNode.ParentNode.getAttribute("ISBN")
Set loc = pn.SelectSingleNode("seriesTitle/store[@id='" & storelc & "']/copies")
If loc Is Nothing Then
arr = Split(storelc, "/")
ln = Trim(arr(UBound(arr)))
Set loc = pn.SelectSingleNode("seriesTitle/store[@id='" & ln & "']/copies")
End If
If Not loc Is Nothing Then
copies = loc.Text
Else
copies = "?"
End If
AddValue seriesArray, series
AddValue AuthorArray, Author
AddValue TitleArray, Title
AddValue StoreLocationArray, StoreLocation
AddValue ISBNArray, ISBN
AddValue copiesArray, copies
j = j + 1
x = x + 1
End If
Next
Range("A3").Resize(j, 1).Value = WorksheetFunction.Transpose(AuthorArray)
Range("B3").Resize(j, 1).Value = WorksheetFunction.Transpose(TitleArray)
Range("C3").Resize(j, 1).Value = WorksheetFunction.Transpose(ISBNArray)
Range("D3").Resize(j, 1).Value = WorksheetFunction.Transpose(seriesArray)
Range("E3").Resize(j, 1).Value = WorksheetFunction.Transpose(StoreLocationArray)
Range("F3").Resize(j, 1).Value = WorksheetFunction.Transpose(copiesArray)
End Sub
'Utility method - resize an array as needed, and add a new value
Sub AddValue(arr, v)
Dim i As Long
i = -1
On Error Resume Next
i = UBound(arr) + 1
On Error GoTo 0
If i = -1 Then i = 0
ReDim Preserve arr(0 To i)
arr(i) = v
End Sub
我的目标是搜索“seriesTitle”。因此，我将专门创建一个 For 循环，搜索找到的项目的长度，然后解析“seriesTitle”以及 ISBN、StoreLocation、作者、书名和副本。
- 如果seriesTitle存在——那么它是版本14——我想打印seriesTitle、ISBN、StoreLocation、作者、书名和副本。
- 如果 seriesTitle 不存在 - 它是版本 13 - 我只想打印 ISBN、作者和书名。
但问题是，对于每个存在的“book id”，不一定有“seriesTitle”——我们可以绘制的唯一关系是，当“version=13”时，没有 seriesTitle。
- 如果没有用于创建 For 循环搜索的对象，您将如何循环遍历整个文档？当“seriesTitle”不存在时，如何继续向 ISBN、作者和书名数组添加项目？
感谢您对我的教导和任何有用的意见和建议！
