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ASP+XML编程实例讲解(2) - ASP教程

发布时间:2016-05-19 09:47 所属栏目:[教程] 来源:网络整理
导读: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_
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 CLASS=""alert"">" & 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

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