VB.NET未开发人员带来了不一样的开发方式。其中特有的各种特点和语言特性为编程人员开发程序提供了很大的帮助。我们今天就来看一段实现VB.NET读取XML文件的VB代码。使用了递归方式。#t#
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VB.NET读取XML文件代码如下:
- '窗体重写 dispose 以清理组件列表。
- Protected Overloads Overrides
Sub Dispose()Sub Dispose(ByVal
disposing As Boolean)- If disposing Then
- If Not (components Is Nothing)
Then- components.Dispose()
- End If
- End If
- MyBase.Dispose(disposing)
- End Sub
- 'Windows 窗体设计器所必需的
- Private components As System.
ComponentModel.IContainer- '注意: 以下过程是 Windows 窗体设计
器所必需的- '可以使用 Windows 窗体设计器修改此过程。
- '不要使用代码编辑器修改它。
- Friend WithEvents input As System.
Windows.Forms.TextBox- Friend WithEvents outtext As System.
Windows.Forms.TextBox- Friend WithEvents Button1 As System.
Windows.Forms.Button
Private Sub InitializeComponent()
Sub InitializeComponent()- Me.input = New System.Windows.
Forms.TextBox- Me.outtext = New System.Windows.
Forms.TextBox- Me.Button1 = New System.Windows.
Forms.Button- Me.SuspendLayout()
- '
- 'input
- '
- Me.input.Location = New System.
Drawing.Point(16, 8)- Me.input.Name = "input"
- Me.input.Size = New System.
Drawing.Size(464, 21)- Me.input.TabIndex = 0
- Me.input.Text = "http://127.0.0.1/
fileup/people.xml"- '
- 'outtext
- '
- Me.outtext.BackColor = System.
Drawing.SystemColors.HighlightText- Me.outtext.BorderStyle = System.
Windows.Forms.BorderStyle.FixedSingle- Me.outtext.Location = New
System.Drawing.Point(0, 40)- Me.outtext.Multiline = True
- Me.outtext.Name = "outtext"
- Me.outtext.ReadOnly = True
- Me.outtext.ScrollBars = System.
Windows.Forms.ScrollBars.Both- Me.outtext.Size = New System.
Drawing.Size(624, 472)- Me.outtext.TabIndex = 1
- Me.outtext.Text = "TextBox2"
- '
- 'Button1
- '
- Me.Button1.Location = New
System.Drawing.Point(504, 8)- Me.Button1.Name = "Button1"
- Me.Button1.Size = New System.
Drawing.Size(96, 24)- Me.Button1.TabIndex = 2
- Me.Button1.Text = "读 取"
- '
- 'Form1
- '
- Me.AutoScaleBaseSize = New
System.Drawing.Size(6, 14)- Me.ClientSize = New System.
Drawing.Size(632, 517)- Me.Controls.Add(Me.Button1)
- Me.Controls.Add(Me.outtext)
- Me.Controls.Add(Me.input)
- Me.Name = "Form1"
- Me.Text = "Form1"
- Me.ResumeLayout(False)
- End Sub
- #End Region
- Private Sub Button1_Click()
Sub Button1_Click(ByVal sender
As System.Object, ByVal e As
System.EventArgs) Handles
Button1.Click- Dim doc As xmldocument =
New xmldocument- Dim y As String
- doc.Load(input.Text)
- Dim rootnode As XmlElement =
doc.DocumentElement- outtext.Text = ""
- enumeratenode(rootnode, 0)
- End Su
- Private Sub enumeratenode()
Sub enumeratenode(ByVal node
As XmlNode, ByVal indentval
As Integer)- Dim type As String
- Select Case node.NodeType
- Case XmlNodeType.Element
- type = "元素"
- Case XmlNodeType.Text
- type = "文本"
- Case XmlNodeType.Comment
- type = "注释"
- Case Else
- outtext.AppendText(".")
- End Select
- outtext.AppendText(type & "节点找到")
- Select Case node.NodeType
- Case XmlNodeType.Element
- outtext.AppendText(",name="
& node.Name & vbCrLf)- Case XmlNodeType.Text
- outtext.AppendText(",content="
& node.Value & vbCrLf)- Case XmlNodeType.Comment
- outtext.AppendText(",content="
& node.Value & vbCrLf)- Case Else
- outtext.AppendText(".")
- End Select
- If Not node.Attributes Is Nothing Then
- If node.Attributes.Count <> 0 Then
- outtext.AppendText("此节点有属性:")
- Dim attr As XmlAttribute
- For Each attr In node.Attributes
- outtext.AppendText(attr.Name
& " =" & attr.Value & vbCrLf)- Next
- End If
- End If
- If node.HasChildNodes Then
- outtext.AppendText
("此节点有子节点:" & vbCrLf)- Dim child As XmlNode
- For Each child In node.ChildNodes
- enumeratenode(child, indentval + 1)
- Next
- End If
- End Sub
- End Class
VB.NET读取XML文件实现代码的编写方法如上所示。
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