VBA Word CustomXMLPart 中在指定的Node"前添加Node

网上我看见有人想用InsertNodeBefore来实现这个想法。代码如下：

Sub HowDoesInsertNodeBeforeWork()
Dim oCXPart As CustomXMLPart
Dim oCXNode As CustomXMLNode
Dim strXML As String
strXML = "<?xml version='1.0' ?><invoice xmlns='http://abc...xyz'>" _
         & "<items>" _
         & "<item ><name supplier='Home Depot'>Hammer</name><price>12</price></item>" _
         & "<item ><name supplier='Lowes'>Hammer</name><price>12</price></item>" _
         & "<item ><name supplier='Contoso'>Hammer</name><price>11</price></item>" _
         & "</items>" _
         & "</invoice>"
    On Error Resume Next
    ActiveDocument.CustomXMLParts(4).Delete
    On Error GoTo 0
    'Add the part.
    Set oCXPart = ActiveDocument.CustomXMLParts.Add
    'Load the XML
    oCXPart.LoadXML strXML
    'Define a node.
    Set oCXNode = oCXPart.SelectSingleNode("//*[@supplier='Contoso']")
    Debug.Print oCXNode.BaseName
    'Attempt to insert a node before the defined node.
    oCXNode.InsertNodeBefore "Test", , msoCustomXMLNodeElement, "Test Node Text"
    Debug.Print oCXNode.ParentNode.XML
    'Seems the XML should look like this:
    Debug.Print "<item xmlns=""http://abc...xyz""><Test xmlns="""">Test Node Text</Test><name supplier=""Contoso"">Hammer</name><price>11</price></item>"
    'With the new node "Test" inserted before the defined node "name"
    'What am I missing?
End Sub

可是结果是错误的。原因有2：
1. 所先的结点不对，上面代码所先的节点是要插入节点的兄弟节点。实际上应该选这个节点的父节点。
2. 方法不对InsertNodeBefore会将要插入的内容插入到所选节点的未尾。http://msdn.microsoft.com/en-us/library/office/microsoft.office.core.customxmlnode.insertnodebefore(v=office.14).aspx


解决方案是用InsertSubtreeBefore代码如下：

Sub HowDoesInsertNodeBeforeWork()
Dim oCXPart As CustomXMLPart
Dim oCXNode As CustomXMLNode
Dim strXML As String
strXML = "<?xml version='1.0' ?><invoice xmlns='http://abc...xyz'>" _
         & "<items>" _
         & "<item ><name supplier='Home Depot'>Hammer</name><price>12</price></item>" _
         & "<item ><name supplier='Lowes'>Hammer</name><price>12</price></item>" _
         & "<item ><name supplier='Contoso'>Hammer</name><price>11</price></item>" _
         & "</items>" _
         & "</invoice>"
    On Error Resume Next
    ActiveDocument.CustomXMLParts(4).Delete
    On Error GoTo 0
    'Add the part.
    Set oCXPart = ActiveDocument.CustomXMLParts.Add
    'Load the XML
    oCXPart.LoadXML strXML
    'Define a node.
    Set oCXNode = oCXPart.SelectSingleNode("/ns0:invoice[1]/ns0:items[1]/ns0:item[3][ns0:name[@supplier='Contoso']]")
    Set xt = oCXPart.SelectSingleNode("/ns0:invoice[1]/ns0:items[1]/ns0:item[3]/ns0:name[@supplier='Contoso']")
    Debug.Print oCXNode.BaseName
    Debug.Print oCXNode.XPath
    'Attempt to insert a node before the defined node.
    'oCXNode.InsertNodeBefore "Test", , msoCustomXMLNodeElement, "Test Node Text"
    oCXNode.InsertSubtreeBefore "<test>Test Node Text</test>", xt
    Debug.Print oCXPart.SelectSingleNode("/ns0:invoice[1]/ns0:items[1]/ns0:item[3][ns0:name[@supplier='Contoso']]").XML
    'Seems the XML should look like this:
    Debug.Print "<item xmlns=""http://abc...xyz""><Test xmlns="""">Test Node Text</Test><name supplier=""Contoso"">Hammer</name><price>11</price></item>"
    'With the new node "Test" inserted before the defined node "name"
    'What am I missing?
End Sub