XML : 在特定节点之间添加节点

Question

这是我的 xml 文档：

<FolderSettings>
<quantity>0</quantity>
<FolderList>
   <Folder>
    <FolderName>E:\05.09.2016</FolderName>
    <Checked>true</Checked>
  </Folder>

  <Folder>
    <FolderName>E:\100CANON</FolderName>
    <Checked>true</Checked>
  </Folder>

  <Folder>
    <FolderName>G:\Sony</FolderName>
    <Checked>true</Checked>
  </Folder>

</FolderList>

我想将带有 2 个注释的文件夹节点添加到 FolderList 节点中。

<Folder>
   <FolderName>E:\Nikon</FolderName>
    <Checked>true</Checked>
  </Folder>

每次我选择/添加一个文件夹时，哪个文件夹会作为节点添加到 FolderList 中？

我该怎么做？我尝试了一些几乎失败的方法。

这是我在 FolderList 节点中添加注释的代码

        Dim xmlFile = XDocument.Load(PXmlFileName)
        Dim element = <Folder>
                          <FolderName><%= _folderPath$ %></FolderName>
                          <Checked><%= "true" %></Checked>
                      </Folder>
        Dim parent = xmlFile...<FolderList>.FirstOrDefault()
        parent.Add(element)
        xmlFile.Save(PXmlFileName)

谢谢

Public Function UpdateFolderListsIntoXML(_folderPath$) As Boolean
    Dim _xdoc As New XDocument()
    Try
    'Loading: 
        _xdoc = XDocument.Load(PXmlFileName)
        Dim _lamIsElementExists = Function(_elementName$)
                                      Dim _folderlistElement As XElement
                                      Try
                                          _folderlistElement = _xdoc.Root.Element(_elementName$)
                                          If Not IsNothing(_folderlistElement) Then
                                              Return True
                                          Else
                                              Return False
                                          End If
                                      Catch ex As Exception
                                          Return False
                                      Finally
                                          _folderlistElement = Nothing
                                      End Try
                                  End Function
        If _lamIsElementExists("FolderList") = False Then
            'create FolderList element
            _xdoc.Root.Element("FolderSettings").Add(<FolderList>
                                                     </FolderList>)
            _xdoc.Save(PXmlFileName)
            'After Create "FolderList" Element loading xml file again
            _xdoc = XDocument.Load(PXmlFileName)
        End If
        'Add New Path into FolderList Element
        Dim element = <Folder>
                          <FolderName><%= _folderPath$ %></FolderName>
                          <Checked><%= "true" %></Checked>
                      </Folder>
        Dim parent = _xdoc...<FolderList>.FirstOrDefault()
        parent.Add(element)
        _xdoc.Save(PXmlFileName)
        Return True
    Catch ex As Exception
        PeX = ex
        Return False
    Finally
        _xdoc = Nothing
    End Try
End Function

这对我来说很好......我感谢任何建议谢谢

Answer 1

我建议你使用 Append 而不是 Add.. 就像我在网上找到的这个例子一样：

' create new instance of XmlDocument
Dim doc As New XmlDocument()

' load from file 
doc.Load(filename)

' create node and add value 
Dim node As XmlNode = doc.CreateNode(XmlNodeType.Element, "FolderList", Nothing)
'node.InnerText = "this is new node";

' create title node 
Dim nodeTitle As XmlNode = doc.CreateElement("FolderName")
'add value for it
nodeTitle.InnerText = "G:\Sony"

' create Url node 
Dim nodeUrl As XmlNode = doc.CreateElement("Checked")
nodeUrl.InnerText = "True"

' add to parent node 
node.AppendChild(nodeTitle)
node.AppendChild(nodeUrl)

' add to elements collection 
doc.DocumentElement.AppendChild(node)

' save back 
doc.Save(filename)