VB.net 读写 XML 的类...
'使用起来很简单，支持多级项目，级间使用'/'分割。
'厄，Bug 还是有的，但对正常操作没有大的影响，
'如果有什么大的 Bug 或改进建议，请联系我...
Imports System.Xml

Public Class Xml_ClsClass Xml_Cls
Private XmlDoc As XmlDocument
Private XmlFile As String

Public ReadOnly Property XmlFileName()Property XmlFileName() As String
Get
Return XmlFile
End Get
End Property

Public ReadOnly Property XmlText()Property XmlText() As String
Get
Return XmlDoc.InnerXml
End Get
End Property

Sub New()Sub New(ByVal FileName As String,Optional ByVal CreateNew As Boolean = True,Optional ByVal Root As String = "XML",Optional ByRef IsOK As Boolean = False)
IsOK = False
XmlFile = ""

Dim reader As System.Xml.XmlReader = Nothing
Try
reader = New System.Xml.XmlTextReader(FileName)
reader.Read()
Catch ex As Exception
If Not (reader Is Nothing) Then
reader.Close()
End If
Debug.Print("New - " & ex.Message)
If Not Create(FileName,Root) Then
Return
End If
Finally
If Not (reader Is Nothing) Then
reader.Close()
End If
End Try
IsOK = True
XmlFile = FileName
XmlDoc = New XmlDocument
XmlDoc.Load(XmlFile)
End Sub

Public Function Create()Function Create(ByVal FileName As String,Optional ByVal Root As String = "XML") As Boolean
Dim NewXML As XmlTextWriter = Nothing

Try
NewXML = New XmlTextWriter(FileName,Nothing)

NewXML.Formatting = Formatting.Indented
NewXML.WriteStartDocument()
NewXML.WriteComment(My.Application.Info.AssemblyName & " Settings")

NewXML.WriteStartElement(Root)

NewXML.WriteAttributeString("Powered","Null")

NewXML.WriteEndElement()
NewXML.WriteEndDocument()

NewXML.Flush()
NewXML.Close()
Catch ex As Exception
Debug.Print("Create - " & ex.Message)
Return False
Finally
If NewXML IsNot Nothing Then
NewXML.Close()
NewXML = Nothing
End If

End Try

Return True
End Function

Public Function Save()Function Save(ByVal aSection As String,ByVal aKey As String,ByVal aValue As String) As Boolean
Dim Paths() As String
Dim n As Integer

Dim Node,Node2 As XmlNode
Dim Ele As XmlElement

While Strings.Left(aSection,1) = "/"
aSection = Strings.Mid(aSection,2)
End While

'段名是否为空
If aSection = "" Then
XmlDoc.DocumentElement.RemoveAll()
Else

Paths = Strings.Split(aSection,"/")
Try
Node = XmlDoc.DocumentElement.SelectSingleNode(Paths(n))

If Node Is Nothing Then
Ele = XmlDoc.CreateElement(Paths(n))
Node = XmlDoc.DocumentElement.AppendChild(Ele)
End If

For n = 1 To Paths.Length - 1
If Paths(n) = "" Then Continue For

Node2 = Node.SelectSingleNode(Paths(n))
If Node2 Is Nothing Then
Ele = XmlDoc.CreateElement(Paths(n))
Node2 = Node.AppendChild(Ele)
End If
Node = Node2
Next
'键名是否为空
If aKey = "" Then
Node.RemoveAll()
Else
Ele = Node.Item(aKey)

If Ele Is Nothing Then
Ele = XmlDoc.CreateElement(aKey)
Node.AppendChild(Ele)
End If
'值是否为空
If aValue = "" Then
Node.RemoveChild(Ele)
Else
Ele.InnerText = aValue
End If
End If
Catch ex As Exception
Debug.Print(ex.Message)
Return False
End Try
End If

XmlDoc.Save(XmlFile)
Return True
End Function

Public Function Read()Function Read(ByVal aSection As String,Optional ByVal aDefaultValue As String = "") As String Dim Node As XmlNode Node = (XmlDoc.DocumentElement).SelectSingleNode(aSection & "/" & aKey) If Node Is Nothing Then Return aDefaultValue Return Node.InnerText End Function End Class