使用特定的内部文本 vb.net 将子节点添加到父 xml

问题描述

我可以添加一个新的子“CharacterDevelopmentID”和一个增量 ID 作为“Characterdevelpments”的内文 - 没问题。这让我：

  <S2SProject>
   <CharacterDevelopments>
    <CharacterDevelopmentID>1</CharacterDevelopmentID>
    <CharacterDevelopmentID>2</CharacterDevelopmentID>
  </CharacterDevelopments>
 </S2SProject>

添加 CharacterDevelopmentID 后，我需要添加一个额外的子“CharacterDevelopmentName”，但仅限于刚刚创建的 CharacterDevelopmentID 所以新的 XML 应该是这样的：

<S2SProject>
 <CharacterDevelopments>
  <CharacterDevelopmentID>1
   <CharacterDevelopmentName>another test</CharacterDevelopmentName>
  </CharacterDevelopmentID>
  <CharacterDevelopmentID>2
   <CharacterDevelopmentName>yet another test</CharacterDevelopmentName>
  </CharacterDevelopmentID>
 </CharacterDevelopments>
</S2SProject>

我不知道如何以编程方式选择节点。 每当我尝试根据 ID nr 选择节点时，什么都没有发生

        fullPath = TSProjectProjectLocation.Text & "\" & TSProjectProjectName.Text

        xmlDoc.Load(fullPath)
        Dim elemList As XmlNodeList = xmlDoc.GetElementsByTagName("CharacterDevelopmentID")
        Dim i As Integer = elemList.Count + 1

        newChild = CType(xmlDoc.CreateNode(Xml.XmlNodeType.Element,"CharacterDevelopment",""),XmlElement)
        newChild.SetAttribute("CharacterDevelopmentID",i)
        childnode = xmlDoc.CreateElement("CharacterDevelopmentID",i)

        Dim elem1 As XmlElement
        elem1 = xmlDoc.CreateElement("CharacterDevelopmentID")
        elem1.InnerText = i
        parNode = xmlDoc.SelectSingleNode("/S2SProject/CharacterDevelopments")
        parNode.AppendChild(elem1)
        xmlDoc.Save(fullPath) ' --- up to here it works!

        elem1 = xmlDoc.CreateElement("CharacterDevelopmentName")
        elem1.InnerText = NewCharacterDevelopmentName
        parNode = xmlDoc.SelectSingleNode("/S2SProject/CharacterDevelopments/CharacterDevelopmentID[last()]/]") '-- this gives an error XpathException
        parNode.AppendChild(elem1)
        xmlDoc.Save(fullPath)

我尝试了很多方法来让程序选择正确的节点，但无济于事。 任何人都可以指出我正确的方向吗？ 任何能帮助我解决这个问题的东西都将不胜感激！

解决方法

我正准备下班，但我会留下一些代码让你思考。

    Dim xe As XElement
    ' for production use
    '  xe = XElement.Load("path here")
    'for testing use literal
    xe = <S2SProject>
             <CharacterDevelopments>
             </CharacterDevelopments>
         </S2SProject>

    'add some CharacterDevelopmentID
    For x As Integer = 1 To 9
        xe.<CharacterDevelopments>.FirstOrDefault.Add(<CharacterDevelopmentID><%= x %></CharacterDevelopmentID>)
    Next

    'select a particular CharacterDevelopmentID
    Dim sel As IEnumerable(Of XElement)
    sel = From el In xe.<CharacterDevelopments>.<CharacterDevelopmentID>
          Where el.FirstNode.ToString = "7"
           Select el Take 1

    If sel.Count = 1 Then
        sel(0).LastNode.AddAfterSelf(<CharacterDevelopmentName>another test</CharacterDevelopmentName>)
    End If