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#
VB.NET读取XML文件代码如下:
- Imports System.xml
- Public Class Form1Class Form1
- Inherits System.Windows.Forms.Form
- #Region " Windows 窗体设计器生成的代码 "
- Public Sub New()Sub New()
- MyBase.New()
- '该调用是 Windows 窗体设计器所必需的。
- InitializeComponent()
- '在 InitializeComponent()
调用之后添加任何初始化 - End Sub
'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
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'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
<System.Diagnostics.DebuggerStepThrough()>
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
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#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
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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
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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
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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
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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
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VB.NET读取XML文件实现代码的编写方法如上所示。