如何从具有多个子节点的 XML 文件填充树视图？

Question

我正在尝试从 XML 文件填充 VB.NET 中的 TreeView 组件。这是一个很大的 XML 文件，我把它切碎了，以便让你们了解它的结构。我是 VB.NET 的新手，所以我很难弄清楚这一点。下面是我希望这些数据在 TreeView 中显示的顺序的图像，并且我添加了一些箭头，以便您了解数据在 XML 结构中应该来自哪里。

我找到并尝试修改从 Microsoft 教程中获得的代码，但它基于更简单的 XML 结构，并且不适用于我的文件。

图像中的箭头与 XML 标记和节点显示不同步，但我的目标是避免箭头和矩形相互重叠，使图片不可读。

当我们有一个名为“Cutter”的节点时，它是一种不同类型的组件，当前的“Cutter”或“Holder”节点中可能包含多个组件，因此它们由“Reference”标签分隔。如果它被命名为“Holder”，则它是工具堆栈上的另一种组件类型......每个新工具都以一个名为“Tool”的元素开头。

在图片下面我想在代码中做什么：

Tree View Explanation

Private Sub btnSearchTLS_Click(sender As Object, e As EventArgs) Handles btnSearchTLS.Click

        Try
            ' SECTION 1. Create a DOM Document and load the XML data into it.
            Dim dom As New XmlDocument()
            dom.Load(txtFileOpenTLS_2.Text)

            ' SECTION 2. Initialize the treeview control.
            tviewToolIDs.Nodes.Clear()
            tviewToolIDs.Nodes.Add(New TreeNode(dom.DocumentElement.Name))
            Dim tNode As New TreeNode()
            tNode = tviewToolIDs.Nodes(0)

            ' SECTION 3. Populate the TreeView with the DOM nodes.
            AddNode(dom.DocumentElement, tNode)
            tviewToolIDs.ExpandAll()

        Catch xmlEx As XmlException
            MessageBox.Show(xmlEx.Message)
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub

    Private Sub AddNode(ByRef inXmlNode As XmlNode, ByRef inTreeNode As TreeNode)
        Dim xNode As XmlNode
        Dim tNode As TreeNode
        Dim nodeList As XmlNodeList
        Dim i As Integer

        ' Loop through the XML nodes until the leaf is reached.
        ' Add the nodes to the TreeView during the looping process.
        If inXmlNode.HasChildNodes() Then
            nodeList = inXmlNode.ChildNodes
            For i = 0 To nodeList.Count - 1
                xNode = inXmlNode.(i)
                inTreeNode.Nodes.Add(New TreeNode(xNode.Name))
                tNode = inTreeNode.Nodes(i)
                AddNode(xNode, tNode)
            Next
        Else
            ' Here you need to pull the data from the XmlNode based on the
            ' type of node, whether attribute values are required, and so forth.
            inTreeNode.Text = (inXmlNode.OuterXml).Trim
        End If
    End Sub

这是 XML 文件：

    <?xml version="1.0"?>
<ToolLibrary Version="7.3">
    <Tools>
    <Tool ID="100004" Units="Millimeter">
      <Description>100004</Description>
      <Teeth>1</Teeth>
      <Type>Turning</Type>
      <Cutter>
        <Reference ID="12140 - N123G2-0318-0008">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Torneamento - Insertos paramétricos</ToolID>
          <EntityName>12140 - N123G2-0318-0008</EntityName>
          <Origin>
            <X>34.2</X>
            <Y>0</Y>
            <Z>-82.3</Z>
          </Origin>
          <Rotation>
            <X>0</X>
            <Y>-90</Y>
            <Z>0</Z>
          </Rotation>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
      </Cutter>
      <Holder>
        <Reference ID="12135 - C5-570-32-LF">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>12135 - C5-570-32-LF</EntityName>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="12139 - 570-32L123G18B130A">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>12139 - 570-32L123G18B130A</EntityName>
          <Origin>
            <X>21</X>
            <Y>0</Y>
            <Z>-42</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
      </Holder>
      <DrivenPoint ID="1">
        <Type>-1</Type>
        <Radius>0</Radius>
        <X>35</X>
        <Y>0</Y>
        <Z>-83.1</Z>
      </DrivenPoint>
      <DrivenPoint ID="2">
        <Type>-1</Type>
        <Radius>0</Radius>
        <X>31.82</X>
        <Y>0</Y>
        <Z>-83.1</Z>
      </DrivenPoint>
      <CutterCompensation ID="1">0.8</CutterCompensation>
      <CutterCompensation ID="2">0.8</CutterCompensation>
    </Tool>
    <Tool ID="100171" Units="Millimeter">
      <Description>100171</Description>
      <Teeth>1</Teeth>
      <Type>Turning</Type>
      <Cutter>
        <Reference ID="12349 - CNMG120412">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Torneamento - Insertos paramétricos</ToolID>
          <EntityName>12349 - CNMG120412</EntityName>
          <Origin>
            <X>-35.8</X>
            <Y>0</Y>
            <Z>-291.8</Z>
          </Origin>
          <Rotation>
            <X>0</X>
            <Y>-5</Y>
            <Z>0</Z>
          </Rotation>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
      </Cutter>
      <Holder>
        <Reference ID="11977 - C6-390.410-100-110A">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>11977 - C6-390.410-100-110A</EntityName>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="11978 - C6-570-2C-60-148-40L">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>11978 - C6-570-2C-60-148-40L</EntityName>
          <Origin>
            <X>0</X>
            <Y>0</Y>
            <Z>-110</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="11979 - SL-PCLNL-40-12HP">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>11979 - SL-PCLNL-40-12HP</EntityName>
          <Origin>
            <X>-10</X>
            <Y>0</Y>
            <Z>-258</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
      </Holder>
      <DrivenPoint ID="1">
        <Type>-1</Type>
        <Radius>0</Radius>
        <X>-37</X>
        <Y>0</Y>
        <Z>-293</Z>
      </DrivenPoint>
      <DrivenPoint ID="2">
        <Type>-1</Type>
        <Radius>0</Radius>
        <X>-37</X>
        <Y>0</Y>
        <Z>-293</Z>
      </DrivenPoint>
      <CutterCompensation ID="1">1.2</CutterCompensation>
      <CutterCompensation ID="2">1.2</CutterCompensation>
    </Tool>
    <Tool ID="100178" Units="Millimeter">
      <Description>100178</Description>
      <Teeth>8</Teeth>
      <Type>Milling</Type>
      <Cutter>
        <Reference ID="10084 - R90MT-12-05-RM">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Rotativas - Insertos Paramétricos</ToolID>
          <EntityName>10084 - R90MT-12-05-RM</EntityName>
          <Origin>
            <X>44</X>
            <Y>0</Y>
            <Z>-614</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="10084 - R90MT-12-05-RM1">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Rotativas - Insertos Paramétricos</ToolID>
          <EntityName>10084 - R90MT-12-05-RM</EntityName>
          <Origin>
            <X>31.112698</X>
            <Y>-31.112698</Y>
            <Z>-614</Z>
          </Origin>
          <Rotation>
            <X>0</X>
            <Y>0</Y>
            <Z>-45</Z>
          </Rotation>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="10084 - R90MT-12-05-RM11">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Rotativas - Insertos Paramétricos</ToolID>
          <EntityName>10084 - R90MT-12-05-RM</EntityName>
          <Origin>
            <X>31.112698</X>
            <Y>31.112698</Y>
            <Z>-614</Z>
          </Origin>
          <Rotation>
            <X>0</X>
            <Y>0</Y>
            <Z>45</Z>
          </Rotation>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="10084 - R90MT-12-05-RM12">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Rotativas - Insertos Paramétricos</ToolID>
          <EntityName>10084 - R90MT-12-05-RM</EntityName>
          <Origin>
            <X>0</X>
            <Y>-44</Y>
            <Z>-614</Z>
          </Origin>
          <Rotation>
            <X>0</X>
            <Y>0</Y>
            <Z>-90</Z>
          </Rotation>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="10084 - R90MT-12-05-RM13">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Rotativas - Insertos Paramétricos</ToolID>
          <EntityName>10084 - R90MT-12-05-RM</EntityName>
          <Origin>
            <X>0</X>
            <Y>44</Y>
            <Z>-614</Z>
          </Origin>
          <Rotation>
            <X>0</X>
            <Y>0</Y>
            <Z>90</Z>
          </Rotation>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="10084 - R90MT-12-05-RM14">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Rotativas - Insertos Paramétricos</ToolID>
          <EntityName>10084 - R90MT-12-05-RM</EntityName>
          <Origin>
            <X>-31.112698</X>
            <Y>31.112698</Y>
            <Z>-614</Z>
          </Origin>
          <Rotation>
            <X>0</X>
            <Y>0</Y>
            <Z>135</Z>
          </Rotation>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="10084 - R90MT-12-05-RM15">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Rotativas - Insertos Paramétricos</ToolID>
          <EntityName>10084 - R90MT-12-05-RM</EntityName>
          <Origin>
            <X>-44</X>
            <Y>0</Y>
            <Z>-614</Z>
          </Origin>
          <Rotation>
            <X>0</X>
            <Y>0</Y>
            <Z>180</Z>
          </Rotation>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="10084 - R90MT-12-05-RM">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Rotativas - Insertos Paramétricos</ToolID>
          <EntityName>10084 - R90MT-12-05-RM</EntityName>
          <Origin>
            <X>-31.1127</X>
            <Y>-31.1127</Y>
            <Z>-614</Z>
          </Origin>
          <Rotation>
            <X>0</X>
            <Y>0</Y>
            <Z>-135</Z>
          </Rotation>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
      </Cutter>
      <Holder>
        <Reference ID="11974 - C8-390.410-100 120A">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>11974 - C8-390.410-100 120A</EntityName>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="12001 - C8-391.01-80 065">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>12001 - C8-391.01-80 065</EntityName>
          <Origin>
            <X>0</X>
            <Y>0</Y>
            <Z>-120</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="12001 - C8-391.01-80 065">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>12001 - C8-391.01-80 065</EntityName>
          <Origin>
            <X>0</X>
            <Y>0</Y>
            <Z>-185</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="12002 - C8-391.05-CD-32-320">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>12002 - C8-391.05-CD-32-320</EntityName>
          <Origin>
            <X>0</X>
            <Y>0</Y>
            <Z>-250</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="10707 - FCM-D100-32-11">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>10707 - FCM-D100-32-11</EntityName>
          <Origin>
            <X>0</X>
            <Y>0</Y>
            <Z>-570</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
      </Holder>
      <DrivenPoint ID="1">
        <Type>-1</Type>
        <Radius>0</Radius>
        <X>0</X>
        <Y>0</Y>
        <Z>-620</Z>
      </DrivenPoint>
      <DrivenPoint ID="2">
        <Type>-1</Type>
        <Radius>0</Radius>
        <X>0</X>
        <Y>0</Y>
        <Z>-620</Z>
      </DrivenPoint>
      <CutterCompensation ID="1">50</CutterCompensation>
      <CutterCompensation ID="2">50</CutterCompensation>
    </Tool>
    <Tool ID="100192" Units="Millimeter">
      <Description>100192</Description>
      <Teeth>1</Teeth>
      <Type>Milling</Type>
      <Cutter>
        <Reference ID="10087 - 880-05-03-05H-C-GM">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Rotativas - Insertos Paramétricos</ToolID>
          <EntityName>10087 - 880-05-03-05H-C-GM</EntityName>
          <Origin>
            <X>-7.9</X>
            <Y>0</Y>
            <Z>-233.5</Z>
          </Origin>
          <Rotation>
            <X>0</X>
            <Y>0</Y>
            <Z>180</Z>
          </Rotation>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="10088 - 880-05 03 W05H-P-GM">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Rotativas - Insertos Paramétricos</ToolID>
          <EntityName>10088 - 880-05 03 W05H-P-GM</EntityName>
          <Origin>
            <X>12</X>
            <Y>0</Y>
            <Z>-233.5</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
      </Cutter>
      <Holder>
        <Reference ID="12007 - C4-390.410-100-090A">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>12007 - C4-390.410-100-090A</EntityName>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="12033 - 880-D2500C4-04">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>12033 - 880-D2500C4-04</EntityName>
          <Origin>
            <X>0</X>
            <Y>0</Y>
            <Z>-90</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
      </Holder>
      <DrivenPoint ID="1">
        <Type>-1</Type>
        <Radius>0</Radius>
        <X>0</X>
        <Y>0</Y>
        <Z>-234</Z>
      </DrivenPoint>
    </Tool>
    <Tool ID="801154" Units="Millimeter">
      <Description>801154</Description>
      <Teeth>1</Teeth>
      <Type>Turning</Type>
      <Cutter>
        <Reference ID="11325 - MKI-176807-13_4.4">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Torneamento - Insertos 3D</ToolID>
          <EntityName>11325 - MKI-176807-13_4.4</EntityName>
          <Origin>
            <X>-5.18</X>
            <Y>0</Y>
            <Z>-225</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
      </Cutter>
      <Holder>
        <Reference ID="12016 - 392.410-100-ASHL-32">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>12016 - 392.410-100-ASHL-32</EntityName>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
        <Reference ID="11328 - MKS-366807-18">
          <FileName>TBT_MASTER_LIBRARY.tls</FileName>
          <ToolID>Holders &amp; Acessorios</ToolID>
          <EntityName>11328 - MKS-366807-18</EntityName>
          <Origin>
            <X>-8</X>
            <Y>0</Y>
            <Z>-55</Z>
          </Origin>
          <NoSpin>0</NoSpin>
          <Alternate>Off</Alternate>
        </Reference>
      </Holder>
      <DrivenPoint ID="2">
        <Type>-1</Type>
        <Radius>0</Radius>
        <X>-2.980037</X>
        <Y>0</Y>
        <Z>-225</Z>
      </DrivenPoint>
      <DrivenPoint ID="1">
        <Type>-1</Type>
        <Radius>0</Radius>
        <X>-7.380037</X>
        <Y>0</Y>
        <Z>-225</Z>
      </DrivenPoint>
      <CutterCompensation ID="1">1.5</CutterCompensation>
      <CutterCompensation ID="2">1.5</CutterCompensation>
    </Tool>
  </Tools>
 </ToolLibrary>

我必须在上面的代码中做什么（考虑到它是正确的代码 - 随意提出一种新方法）才能使我的 TreeView 像图片中所示那样被填充？

很抱歉，我询问了可能已经涵盖的内容，我进行了搜索，但找不到可以与我的 XML 示例一起使用的内容。

Tks 提前，

丹尼尔

Answer 1

我添加了一些过滤。为此，我从 XmlDocument 更改为 linq XDocument。我在代码中提取了一堆对象，但没有将它们全部放入树视图中。交给你了。

Imports System.Xml
Imports System.Xml.Linq
Imports System.IO
Imports System.Text.Encoding
Public Class Form1
    Const FILENAME As String = "c:\temp\test.xml"
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Try
            ' SECTION 1. Create a DOM Document and load the XML data into it

            Dim reader As New StreamReader(FILENAME, System.Text.Encoding.UTF8)
            Dim dom As XDocument = XDocument.Load(reader)            ' SECTION 2. Initialize the treeview control.
            TreeView1.Nodes.Clear()
            TreeView1.Nodes.Add(New TreeNode(dom.Root.Name.LocalName))
            Dim tNode As New TreeNode()
            tNode = TreeView1.Nodes(0)
            Dim tools As XElement = dom.Descendants("Tools").FirstOrDefault()
            ' SECTION 3. Populate the TreeView with the DOM nodes.
            AddNode(tools, tNode)
            TreeView1.ExpandAll()

        Catch xmlEx As XmlException
            MessageBox.Show(xmlEx.Message)
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub

    Private Sub AddNode(ByRef inXmlNode As XElement, ByRef inTreeNode As TreeNode)
        Dim elements As List(Of XElement)
        Dim tNode As TreeNode
        Dim nodeList As XmlNodeList
        Dim i As Integer

        ' Loop through the XML nodes until the leaf is reached.
        ' Add the nodes to the TreeView during the looping process.
        If inXmlNode.Descendants.Count > 0 Then
            elements = inXmlNode.Descendants("Tool").ToList()
            For Each element As XElement In elements
                Dim ID As String = element.Attribute("ID").Value
                Dim Description As String = element.Element("Description").Value
                Dim Teeth As String = element.Element("Teeth").Value
                Dim Type As String = element.Element("Type").Value

                Dim CutterReference As XElement = element.Element("Cutter").Element("Reference")
                Dim Cutter_ID As String = CutterReference.Attribute("ID")
                Dim HolderReference As XElement = element.Element("Holder").Element("Reference")
                Dim Holder_ID As String = HolderReference.Attribute("ID")


                Dim newNode As TreeNode = inTreeNode.Nodes.Add(Description)
                newNode.Nodes.Add("Cutter :" & Cutter_ID)
                newNode.Nodes.Add("Holder :" & Holder_ID)


            Next element
        Else
            ' Here you need to pull the data from the XmlNode based on the
            ' type of node, whether attribute values are required, and so forth.
            inTreeNode.Text = (inXmlNode.ToString()).Trim
        End If
    End Sub
End Class

Answer 2

我改进了输出。见下面的代码

Imports System.Xml
Imports System.Xml.Linq
Imports System.IO
Imports System.Text.Encoding
Public Class Form1
    Const FILENAME As String = "c:\temp\test.xml"
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Try
            ' SECTION 1. Create a DOM Document and load the XML data into it

            Dim reader As New StreamReader(FILENAME, System.Text.Encoding.UTF8)
            Dim dom As XDocument = XDocument.Load(reader)            ' SECTION 2. Initialize the treeview control.
            TreeView1.Nodes.Clear()
            TreeView1.Nodes.Add(New TreeNode(dom.Root.Name.LocalName))
            Dim tNode As New TreeNode()
            tNode = TreeView1.Nodes(0)
            Dim tools As XElement = dom.Descendants("Tools").FirstOrDefault()
            ' SECTION 3. Populate the TreeView with the DOM nodes.
            AddNode(tools, tNode)
            TreeView1.CollapseAll()
            ExpandToLevel(TreeView1.Nodes, 1)


        Catch xmlEx As XmlException
            MessageBox.Show(xmlEx.Message)
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub

    Private Sub AddNode(ByRef inXmlNode As XElement, ByRef inTreeNode As TreeNode)
        Dim elements As List(Of XElement)

        ' Loop through the XML nodes until the leaf is reached.
        ' Add the nodes to the TreeView during the looping process.
        If inXmlNode.Descendants.Count > 0 Then
            elements = inXmlNode.Descendants("Tool").ToList()
            For Each element As XElement In elements
                Dim ID As String = element.Attribute("ID").Value
                Dim Description As String = element.Element("Description").Value
                Dim Teeth As String = element.Element("Teeth").Value
                Dim Type As String = element.Element("Type").Value

                Dim newNode As TreeNode = inTreeNode.Nodes.Add(ID & " (" & String.Join(", ", {Description, "Teeth : " & Teeth, "Type : " & Type}) & ")")

                If Not element.Element("Cutter") Is Nothing Then
                    Dim Cutters As List(Of XElement) = element.Element("Cutter").Elements("Reference").ToList()
                    Dim CutterBranch As TreeNode = newNode.Nodes.Add("Cutter")
                    For Each Cutter As XElement In Cutters
                        Dim Cutter_ID As String = Cutter.Attribute("ID")
                        CutterBranch.Nodes.Add(Cutter_ID)
                    Next Cutter
                End If

                If Not element.Element("Holder") Is Nothing Then
                    Dim Holders As List(Of XElement) = element.Element("Holder").Elements("Reference").ToList()

                    Dim HolderBranch As TreeNode = newNode.Nodes.Add("Holder")
                    For Each Holder As XElement In Holders
                        Dim Holder_ID As String = Holder.Attribute("ID")
                        HolderBranch.Nodes.Add(Holder_ID)
                    Next Holder
                End If
            Next element
        Else
            ' Here you need to pull the data from the XmlNode based on the
            ' type of node, whether attribute values are required, and so forth.
            inTreeNode.Text = (inXmlNode.ToString()).Trim
        End If
    End Sub
    Sub ExpandToLevel(nodes As TreeNodeCollection, level As Integer)
        If level > 0 Then
            For Each node As TreeNode In nodes
                node.Expand()
                ExpandToLevel(node.Nodes, level - 1)
            Next node
        End If
    End Sub
    Sub treeView1_AfterExpand(sender As Object, e As TreeViewEventArgs) Handles TreeView1.AfterExpand
        If Not e.Node.Parent Is Nothing Then
            e.Node.ExpandAll()
        End If
    End Sub

End Class
​

Answer 3

我在代码中添加了一个排序器。以前从来没有这样做过。认为它可能会使其更易于使用。我按刀具类型（车削、铣削）和齿数排序

Imports System.Xml
Imports System.Xml.Linq
Imports System.IO
Imports System.Text.Encoding
Public Class Form1
    Const FILENAME As String = "c:\temp\test.xml"
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Try
            ' SECTION 1. Create a DOM Document and load the XML data into it

            Dim reader As New StreamReader(FILENAME, System.Text.Encoding.UTF8)
            Dim dom As XDocument = XDocument.Load(reader)            ' SECTION 2. Initialize the treeview control.
            TreeView1.Nodes.Clear()
            TreeView1.Nodes.Add(New Tool(dom.Root.Name.LocalName, Tool.NType.Root))
            Dim tNode As New Tool(False)
            tNode = TreeView1.Nodes(0)
            Dim tools As XElement = dom.Descendants("Tools").FirstOrDefault()
            ' SECTION 3. Populate the TreeView with the DOM nodes.
            AddNode(tools, tNode)
            TreeView1.TreeViewNodeSorter = NodeSorter.DefaultSorter
            TreeView1.Sort()
            TreeView1.CollapseAll()
            ExpandToLevel(TreeView1.Nodes, 1)


        Catch xmlEx As XmlException
            MessageBox.Show(xmlEx.Message)
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub

    Private Sub AddNode(ByRef inXmlNode As XElement, ByRef inTreeNode As Tool)
        Dim elements As List(Of XElement)

        ' Loop through the XML nodes until the leaf is reached.
        ' Add the nodes to the TreeView during the looping process.
        If inXmlNode.Descendants.Count > 0 Then
            elements = inXmlNode.Descendants("Tool").ToList()
            For Each element As XElement In elements

                Dim newTool As New Tool(Tool.NType.Tool)
                newTool.ID = element.Attribute("ID").Value
                newTool.Description = element.Element("Description").Value
                newTool.Teeth = element.Element("Teeth").Value
                newTool.Type = element.Element("Type").Value
                newTool.Text = newTool.ID & " (" & String.Join(", ", {newTool.Description, "Type : " & newTool.Type, "Teeth : " & newTool.Teeth}) & ")"

                inTreeNode.Nodes.Add(newTool)

                If Not element.Element("Cutter") Is Nothing Then
                    Dim Cutters As List(Of XElement) = element.Element("Cutter").Elements("Reference").ToList()
                    Dim newCutter As Tool = New Tool("Cutter", Tool.NType.Type)
                    newTool.Nodes.Add(newCutter)
                    For Each Cutter As XElement In Cutters
                        Dim Cutter_ID As String = Cutter.Attribute("ID")
                        newCutter.Nodes.Add(New Tool(Cutter_ID, Tool.NType.Part))
                    Next Cutter
                End If

                If Not element.Element("Holder") Is Nothing Then
                    Dim Holders As List(Of XElement) = element.Element("Holder").Elements("Reference").ToList()

                    Dim newHolder As Tool = New Tool("Holder", Tool.NType.Type)
                    newTool.Nodes.Add(newHolder)
                    For Each Holder As XElement In Holders
                        Dim Holder_ID As String = Holder.Attribute("ID")
                        newHolder.Nodes.Add(New Tool(Holder_ID, Tool.NType.Part))
                    Next Holder
                End If
            Next element
        Else
            ' Here you need to pull the data from the XmlNode based on the
            ' type of node, whether attribute values are required, and so forth.
            inTreeNode.Text = (inXmlNode.ToString()).Trim
        End If
    End Sub
    Sub ExpandToLevel(nodes As TreeNodeCollection, level As Integer)
        If level > 0 Then
            For Each node As TreeNode In nodes
                node.Expand()
                ExpandToLevel(node.Nodes, level - 1)
            Next node
        End If
    End Sub
    Sub treeView1_AfterExpand(sender As Object, e As TreeViewEventArgs) Handles TreeView1.AfterExpand
        If Not e.Node.Parent Is Nothing Then
            e.Node.ExpandAll()
        End If
    End Sub

End Class
Public Class Tool
    Inherits TreeNode

    Enum NType
        Root
        Tool
        Type
        Part
    End Enum

    Public NodeType As NType
    Sub New(type As NType)
        NodeType = type
    End Sub
    Sub New(text As String, type As NType)
        NodeType = Type
        Me.Text = text
    End Sub
    Private m_ID As String = ""
    Public Property ID As String
        Get
            Return m_ID
        End Get
        Set(value As String)
            m_ID = value
        End Set
    End Property

    Private m_Teeth As String = ""
    Public Property Teeth As String
        Get
            Return m_Teeth
        End Get
        Set(value As String)
            m_Teeth = value
        End Set
    End Property

    Private m_Type As String
    Public Property Type As String
        Get
            Return m_Type
        End Get
        Set(value As String)
            m_Type = value
        End Set
    End Property

    Private m_Description
    Public Property Description As String
        Get
            Return m_Description
        End Get
        Set(value As String)
            m_Description = value
        End Set
    End Property

    Public Function Add(text As String) As Tool
        Me.Text = text
        Return Me
    End Function

End Class
Public Class NodeSorter
    Implements IComparer

    Public Shared ReadOnly DefaultSorter As New NodeSorter

    'Create a node sorter that implements the IComparer interface. 
    'Compare the length of the strings, or the strings 
    'themselves, if they are the same length. 
    Public Function Compare(x As Object, y As Object) As Integer Implements System.Collections.IComparer.Compare

        Dim tx As Tool = CType(x, Tool)
        Dim ty As Tool = CType(y, Tool)

        If tx.NodeType = Tool.NType.Tool And ty.NodeType = Tool.NType.Tool Then
            'Compare the length of the strings, returning the difference. 
            If tx.Type.Length <> ty.Type.Length Then
                Return tx.Text.Length - ty.Text.Length
            End If

            'If they are the same length, call Compare.
            If tx.Type = ty.Type Then
                Return String.Compare(tx.Teeth, ty.Teeth)
            Else
                Return String.Compare(tx.Type, ty.Type)
            End If
        Else
            If tx.NodeType = Tool.NType.Part And ty.NodeType = Tool.NType.Part Then
                Return String.Compare(tx.Text, ty.Text)
            Else
                Return 0
            End If
        End If

    End Function
End Class
​

Answer 4

使用这个。

Const FILENAME As String = "C:\joy\Web.config.xml" Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) 处理 Button1.Click 尝试 ' SECTION 1. 创建一个 DOM 文档并将 XML 数据加载到其中

        Dim reader As New StreamReader(FILENAME, System.Text.Encoding.UTF8)
        Dim dom As XDocument = XDocument.Load(reader)            ' SECTION 2. Initialize the treeview control.
        Dim rootNode As New TreeNode(dom.Root.Name.LocalName)
        TreeView1.Nodes.Clear()
        TreeView1.Nodes.Add(rootNode)
        Dim ch = dom.Root.Elements()

        For Each obj As XElement In ch
            Dim chNode As New TreeNode(obj.Name.LocalName)
            addNode(obj, chNode, rootNode)
        Next

        rootNode.ExpandAll()

    Catch xmlEx As XmlException
        MessageBox.Show(xmlEx.Message)
    Catch ex As Exception
        MessageBox.Show(ex.Message)
    End Try
End Sub


Public Sub addNode(xmlParent As XElement, node As TreeNode, parentNode As TreeNode)
    parentNode.Nodes.Add(node)

    For Each item In xmlParent.Elements()
        Dim chNode As New TreeNode(item.Name.LocalName)
        If item.NodeType = XmlNodeType.Element Then
            For Each attr In item.Attributes
                chNode.Nodes.Add(New TreeNode(attr.Name.ToString() + " = " + attr.Value))
            Next
        End If
        addNode(item, chNode, node)
    Next
End Sub