>+ 实例演练ASP+XML编程(三)
四、操作Xml数据的Cls_Person类说明（clsPerson.asp）
Cls_Person类用来完成与联系人信息相关的各种操作，包括添加、修改和删除等等，它使用VBScript编写。Cls_Person包括Id、Name、Nick、Mobile、Tel、Email、QQ和Company属性，对应于XML文件中的Person节点。Cls_Person包括GetInfoFromXml、AddToXml、EditToXml和DeleteFormXml四个主要方法，分别完成获取信息，添加信息，修改信息和删除信息四个功能。
Cls_Person的具体实现如下，
'***************************************************
' 说明：Person类
' 作者：gwd 2002-11-06
' 引用：pub/constpub.asp
'***************************************************
Class Cls_Person
Private m_intId ' Id，对应Person节点在Persons集合中的位置
Private m_strName ' 姓名
Private m_strNick ' 英文名
Private m_strMobile ' 手机
Private m_strTel ' 电话
Private m_strEmail ' 电子邮件
Private m_strQQ ' QQ号
Private m_strCompany ' 所在公司
Private m_strError ' 出错信息
' 类初始化
Private Sub Class_Initialize()
m_strError = ''
m_intId = -1
End Sub
' 类释放
Private Sub Class_Terminate()
m_strError = ''
End Sub
'-----读写各个属性---------------------------
Public Property Get Id
Id = m_intId
End Property
Public Property Let Id(intId)
m_intId = intId
End Property
Public Property Get Name
Name = m_strName
End Property
Public Property Let Name(strName)
m_strName = strName
End Property
Public Property Get Nick
Nick = m_strNick
End Property
Public Property Let Nick(strNick)
m_strNick = strNick
End Property
Public Property Get Mobile
Mobile = m_strMobile
End Property
Public Property Let Mobile(strMobile)
m_strMobile = strMobile
End Property
Public Property Get Tel
Tel = m_strTel
End Property
Public Property Let Tel(strTel)
m_strTel = strTel
End Property
Public Property Get Email
Email = m_strEmail
End Property
Public Property Let Email(strEmail)
m_strEmail = strEmail
End Property
Public Property Get QQ
QQ = m_strQQ
End Property
Public Property Let QQ(strQQ)
m_strQQ = strQQ
End Property
Public Property Get Company
Company = m_strCompany
End Property
Public Property Let Company(strCompany)
m_strCompany = strCompany
End Property
'-----------------------------------------------
' 获取错误信息
Public Function GetLastError()
GetLastError = m_strError
End Function
' 私有方法，添加错误信息
Private Sub AddErr(strEcho)
m_strError = m_strError + '＜Div & strEcho & '＜/Div＞'
End Sub
' 清除错误信息
Public Function ClearError()
m_strError = ''
End Function
' 从Xml中读取指定节点的数据，并填充各个属性
' 需要首先设置Id
Public Function GetInfoFromXml(objXmlDoc)
Dim objNodeList
Dim I
ClearError
If objXmlDoc Is Nothing Then
GetInfoFromXml = False
AddErr 'Dom对象为空值'
Exit Function
End If
If CStr(m_intId) = '-1' Then
GetInfoFromXml = False
AddErr '未正确设置联系人对象的ID属性'
Exit Function
Else
I = m_intId - 1 ' 要读取得节点位置
End If
' 选择并读取节点信息，赋予各个属性
Set objNodeList = objXmlDoc.getElementsByTagName('Person')
If objNodeList.length - m_intId ＞= 0 Then
On Error Resume Next
m_strName = objNodeList(I).selectSingleNode('Name').Text
m_strNick = objNodeList(I).selectSingleNode('Nick').Text
m_strMobile = objNodeList(I).selectSingleNode('Mobile').Text
m_strTel = objNodeList(I).selectSingleNode('Tel').Text
m_strEmail = objNodeList(I).selectSingleNode('Email').Text
m_strQQ = objNodeList(I).selectSingleNode('QQ').Text
m_strCompany = objNodeList(I).selectSingleNode('Company').Text
GetInfoFromXml = True
Else
GetInfoFromXml = False
AddErr '获取联系信息发生错误'
Set objNodeList = Nothing
Exit Function
End If
Set objNodeList = Nothing
End Function
' 添加信息到XML文件中
' 需要首先设置好要填充的属性
Public Function AddToXml(objXmlDoc)
Dim objPerson, objNode
ClearError
If objXmlDoc Is Nothing Then
AddToXml = False
AddErr 'Dom对象为空值'
Exit Function
End If
' 创建Person节点
Set objPerson = objXmlDoc.createElement('Person')
objXmlDoc.documentElement.appendChild objPerson
' 创建各个子节点
'-----------------------------------------------------
Set objNode = objXmlDoc.createElement('Name')
objNode.Text = m_strName
objPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('Nick')
objNode.Text = m_strNick
objPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('Mobile')
objNode.Text = m_strMobile
objPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('Tel')
objNode.Text = m_strTel
objPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('Email')
objNode.Text = m_strEmail
objPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('QQ')
objNode.Text = m_strQQ
objPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('Company')
objNode.Text = m_strCompany
objPerson.appendChild objNode
'-----------------------------------------------------
Set objNode = Nothing
Set objPerson = Nothing
On Error Resume Next
objXmlDoc.save Server.MapPath(C_XMLFILE) '保存XML文件
If Err.Number = 0 Then
AddToXml = True
Else
AddToXml = False
AddErr Err.Description
End If
End Function
' 从XML文件中删除数据
' 需要首先设置Id
Public Function DeleteFromXml(objXmlDoc)
Dim objNodeList, objNode
ClearError
If objXmlDoc Is Nothing Then
DeleteFromXml = False
AddErr 'Dom对象为空值'
Exit Function
End If
If CStr(m_intId) = '-1' Then
DeleteFromXml = False
AddErr '未正确设置联系人对象的ID属性'
Exit Function
End If
Set objNodeList = objXmlDoc.getElementsByTagName('Person')
If objNodeList.length - m_intId ＜ 0 Then
DeleteFromXml = False
AddErr '未找到相应的联系人'
Set objNodeList = Nothing
Exit Function
End If
On Error Resume Next
Set objNode = objXmlDoc.documentElement.removeChild(objNodeList(intId-1))
If objNode Is Nothing Then
DeleteFromXml = False
AddErr '删除联系人失败'
Set objNodeList = Nothing
Exit Function
Else
objXmlDoc.save Server.MapPath(C_XMLFILE)
End If
Set objNode = Nothing
Set objNodeList = Nothing
If Err.Number = 0 Then
DeleteFromXml = True
Else
DeleteFromXml = False
AddErr Err.Description
End If
End Function
' 修改XML文件中的数据
' 需要首先设置好Id
Public Function EditToXml(objXmlDoc)
Dim objPersonList, objOldPerson, objNewPerson, objNode
ClearError
If objXmlDoc Is Nothing Then
EditToXml = False
AddErr 'Dom对象为空值'
Exit Function
End If
If CStr(m_intId) = '-1' Then
EditToXml = False
AddErr '未正确设置联系人对象的ID属性'
Exit Function
End If
Set objPersonList = objXmlDoc.getElementsByTagName('Person')
If objPersonList.length - m_intId ＜ 0 Then
DeleteFromXml = False
AddErr '未找到相应的联系人'
Set objPersonList = Nothing
Exit Function
End If
Set objOldPerson = objPersonList(m_intId-1) ' 要修改的旧节点
Set objNewPerson = objXmlDoc.createElement('Person') ' 用来替换旧节点的新节点
Set objNode = objXmlDoc.createElement('Name')
objNode.Text = m_strName
objNewPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('Nick')
objNode.Text = m_strNick
objNewPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('Mobile')
objNode.Text = m_strMobile
objNewPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('Tel')
objNode.Text = m_strTel
objNewPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('Email')
objNode.Text = m_strEmail
objNewPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('QQ')
objNode.Text = m_strQQ
objNewPerson.appendChild objNode
Set objNode = objXmlDoc.createElement('Company')
objNode.Text = m_strCompany
objNewPerson.appendChild objNode
On Error Resume Next
' 进行替换
Set objNode = objXmlDoc.documentElement.replaceChild(objNewPerson, objOldPerson)
If objNode Is Nothing Then
EditToXml = False
AddErr '修改联系人失败'
Set objOldPerosn = Nothing
Set objNewPerson = Nothing
Set objPersonList = Nothing
Exit Function
Else
objXmlDoc.save Server.MapPath(C_XMLFILE)
End If
Set objOldPerson = Nothing
Set objNewPerson = Nothing
Set objPersonList = Nothing
If Err.Number = 0 Then
EditToXml = True
Else
EditToXml = False
AddErr Err.Description
End If
End Function
End Class
