读写XML节点数据

代码
<?xml version="1.0" encoding="utf-8" ?>
<root>
  <!--当前酒店信息-->
  <CurretnHotelInfo>
    <HotelId>-1</HotelId>
    <SmtpServer>222.22.2.222</SmtpServer>
    <EmailBcc>aaaa@aaa.com</EmailBcc>
  </CurretnHotelInfo>

  <HotelInfoList>
    <HotelItem id="1" version="20100206" />
    <HotelItem id="2" version="20100206" />
    <HotelItem id="3" version="20100205" />
    <HotelItem id="4" version="20100206" />
    <HotelItem id="5" version="20100206" />
    <HotelItem id="6" version="20100206" />
    <HotelItem id="7" version="20100206" />
    <HotelItem id="8" version="20100206" />
  </HotelInfoList>

 

  
</root>

 

 

 

 

Imports System.Configuration
Imports System.Xml

Public Class HotelInfoConfigManager

    Private Const HotelIdKeyName As String = "HotelId"

    Private Const VersionKeyName As String = "Version"

    Private Shared _xmlFileName As String = String.Concat(Application.StartupPath + "\HotelInfoConfig.xml")

    ''' <summary>
    ''' 读取配置文件中的当前酒店Id
    ''' </summary>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Public Shared Function GetHotelId() As String
        Dim xmldoc As New Xml.XmlDocument()
        Try
            xmldoc.Load(_xmlFileName)
            Dim node As XmlNode = xmldoc.GetElementsByTagName("CurretnHotelInfo")(0)
            Dim result As String = node.ChildNodes(0).InnerText
            Return result
        Catch ex As Exception
            Throw New Exception("读取配置文件中的当前酒店Id异常！")
        End Try
        
    End Function


    ''' <summary>
    ''' 设置酒店ID到配置文件中
    ''' </summary>
    ''' <param name="hotelId"></param>
    ''' <remarks></remarks>
    Public Shared Function SetHotelId(ByVal hotelId As String) As Boolean
        Dim xmldoc As New Xml.XmlDocument()
        Try
            xmldoc.Load(_xmlFileName)
            Dim node As XmlNode = xmldoc.GetElementsByTagName("CurretnHotelInfo")(0)
            node.ChildNodes(0).InnerText = hotelId
            xmldoc.Save(_xmlFileName)
            Return True
        Catch ex As Exception
            Return False
        End Try
    End Function


    ''' <summary>
    ''' 根据酒店Id读取对应的版本号
    ''' </summary>
    ''' <param name="hotelId"></param>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Public Shared Function GetVersionByHotelId(ByVal hotelId As String) As String
        Dim xmldoc As New Xml.XmlDocument()
        Dim result As String = String.Empty
        Try
            xmldoc.Load(_xmlFileName)
            Dim listNode As XmlNode = xmldoc.GetElementsByTagName("HotelInfoList")(0)
            For Each item As XmlNode In listNode.ChildNodes
                If item.Attributes("id").Value = hotelId Then
                    result = item.Attributes("version").Value
                    Exit For
                End If
            Next
            Return result
        Catch ex As Exception
            Throw New Exception("根据酒店Id读取对应的版本号出现异常！")
        End Try

    End Function

    ''' <summary>
    ''' 读取配置文件中的当前酒店对应的版本号
    ''' </summary>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Public Shared Function GetVersion() As String
        Dim hotelId As String = GetHotelId()
        Return GetVersionByHotelId(hotelId)
    End Function


    ''' 读取配置文件中的邮件服务器地址
    ''' </summary>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Public Shared Function GetEmailServer() As String
        Dim xmldoc As New Xml.XmlDocument()
        Try
            xmldoc.Load(_xmlFileName)
            Dim node As XmlNode = xmldoc.GetElementsByTagName("CurretnHotelInfo")(0)
            Dim result As String = node.ChildNodes(1).InnerText
            Return result
        Catch ex As Exception
            Throw New Exception("读取配置文件中的邮件服务器地址异常！")
        End Try

    End Function


    ''' 读取配置文件中的邮件地址
    ''' </summary>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Public Shared Function GetBccEmail() As String
        Dim xmldoc As New Xml.XmlDocument()
        Try
            xmldoc.Load(_xmlFileName)
            Dim node As XmlNode = xmldoc.GetElementsByTagName("CurretnHotelInfo")(0)
            Dim result As String = node.ChildNodes(2).InnerText
            Return result
        Catch ex As Exception
            Throw New Exception("读取配置文件中的邮件地址异常！")
        End Try

    End Function

End Class