实例演练ASP+XML编程(2)
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_PersonPrivate 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 = -1End Sub' 类释放Private Sub Class_Terminate()
m_strError = ""End Sub'-----读写各个属性---------------------------Public Property Get Id
Id = m_intIdEnd PropertyPublic Property Let Id(intId)
m_intId = intIdEnd PropertyPublic Property Get NameName = m_strNameEnd PropertyPublic Property Let Name(strName)
m_strName = strNameEnd PropertyPublic Property Get Nick
Nick = m_strNickEnd PropertyPublic Property Let Nick(strNick)
m_strNick = strNickEnd PropertyPublic Property Get Mobile
Mobile = m_strMobileEnd PropertyPublic Property Let Mobile(strMobile)
m_strMobile = strMobileEnd PropertyPublic Property Get Tel
Tel = m_strTelEnd PropertyPublic Property Let Tel(strTel)
m_strTel = strTelEnd PropertyPublic Property Get Email
Email = m_strEmailEnd PropertyPublic Property Let Email(strEmail)
m_strEmail = strEmailEnd PropertyPublic Property Get QQ
QQ = m_strQQEnd PropertyPublic Property Let QQ(strQQ)
m_strQQ = strQQEnd PropertyPublic Property Get Company
Company = m_strCompanyEnd PropertyPublic Property Let Company(strCompany)
m_strCompany = strCompanyEnd Property'-----------------------------------------------' 获取错误信息Public Function GetLastError()
GetLastError = m_strErrorEnd 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IdPublic Function GetInfoFromXml(objXmlDoc)
Dim objNodeList
Dim IClearErrorIf objXmlDoc Is Nothing Then
GetInfoFromXml = False
AddErr "Dom对象为空值"
Exit Function
End IfIf 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 = NothingEnd 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, objNodeClearErrorIf 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 objNodeSet objNode = objXmlDoc.createElement("Nick")
objNode.Text = m_strNick
objPerson.appendChild objNodeSet objNode = objXmlDoc.createElement("Mobile")
objNode.Text = m_strMobile
objPerson.appendChild objNodeSet objNode = objXmlDoc.createElement("Tel")
objNode.Text = m_strTel
objPerson.appendChild objNodeSet objNode = objXmlDoc.createElement("Email")
objNode.Text = m_strEmail
objPerson.appendChild objNodeSet objNode = objXmlDoc.createElement("QQ")
objNode.Text = m_strQQ
objPerson.appendChild objNodeSet objNode = objXmlDoc.createElement("Company")
objNode.Text = m_strCompany
objPerson.appendChild objNode
'-----------------------------------------------------Set objNode = Nothing
Set objPerson = NothingOn 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 IfEnd Function' 从XML文件中删除数据' 需要首先设置IdPublic Function DeleteFromXml(objXmlDoc)
Dim objNodeList, objNodeClearErrorIf objXmlDoc Is Nothing Then
DeleteFromXml = False
AddErr "Dom对象为空值"
Exit Function
End IfIf 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 IfSet 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 IfOn 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 = NothingIf Err.Number = 0 Then
DeleteFromXml = True
Else
DeleteFromXml = False
AddErr Err.Description
End IfEnd Function' 修改XML文件中的数据' 需要首先设置好IdPublic Function EditToXml(objXmlDoc)
Dim objPersonList, objOldPerson, objNewPerson, objNodeClearErrorIf objXmlDoc Is Nothing Then
EditToXml = False
AddErr "Dom对象为空值"
Exit Function
End IfIf 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 IfSet 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 IfSet 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 objNodeSet objNode = objXmlDoc.createElement("Nick")
objNode.Text = m_strNick
objNewPerson.appendChild objNodeSet objNode = objXmlDoc.createElement("Mobile")
objNode.Text = m_strMobile
objNewPerson.appendChild objNodeSet objNode = objXmlDoc.createElement("Tel")
objNode.Text = m_strTel
objNewPerson.appendChild objNodeSet objNode = objXmlDoc.createElement("Email")
objNode.Text = m_strEmail
objNewPerson.appendChild objNodeSet objNode = objXmlDoc.createElement("QQ")
objNode.Text = m_strQQ
objNewPerson.appendChild objNodeSet objNode = objXmlDoc.createElement("Company")
objNode.Text = m_strCompany
objNewPerson.appendChild objNodeOn 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 FunctionElse
objXmlDoc.save Server.MapPath(C_XMLFILE)End IfSet objOldPerson = NothingSet objNewPerson = NothingSet objPersonList = NothingIf Err.Number = 0 Then
EditToXml = TrueElse
EditToXml = False
AddErr Err.DescriptionEnd IfEnd FunctionEnd Class
五、程序首页（default.asp）
??调用相应的包含文件和公共函数，格式化XML文件，并进行显示。可以看到，页面Title是可定制的，公共的头部和尾部都做成了相应的包含文件。C_TITLE、C_XMLFILE和C_XSLFILE为公共常量，在constpub.asp文件中定义，至于它们的意义，相信读者可以很容易地明白。这里调用了上面定义的FormatXml函数。
＜% Option Explicit'***********************************************' 说明：通讯录' 作者：gwd 2002-11-05'***********************************************%＞＜!--#include file="pub/funcxml.asp"--＞＜!--#include file="pub/constpub.asp"--＞＜HTML＞＜HEAD＞＜TITLE＞＜% = C_TITLE %＞＜/TITLE＞＜META HTTP-EQUIV="content-type" CONTENT="text/html;charset=GB2312"/＞＜link rel="stylesheet" href="contact.css" type="text/css"＞＜/HEAD＞＜BODY＞＜!--#include file="pub/header.asp"--＞＜% = FormatXml(C_XMLFILE, C_XSLFILE) %＞＜br＞＜!--#include file="pub/footer.asp"--＞＜/BODY＞＜/HTML＞
六、添加、修改和删除XML中的信息
??我们知道，在Cls_Person中已经定义了相应的方法，因此，在各个文件中，只需要调用对应的方法即可。添加信息的文件为add.asp，修改信息的文件为edit.asp，删除信息的文件为delete.asp，我们仅以add.asp文件为例进行说明。其中的CheckStrInput和CheckStrOutput函数，用来格式化用户的输入和输出字符串。
＜% Option Explicit'***********************************************' 说明：37080308通讯录' 作者：gwd 2002-11-05'***********************************************%＞＜!--#include file="pub/funcxml.asp"--＞＜!--#include file="pub/constpub.asp"--＞＜!--#include file="pub/funcpub.asp"--＞＜!--#include file="pub/class/clsPerson.asp"--＞＜%
Dim objXml, objPerson
Dim strErrSet objXml = Server.CreateObject("MSXML2.DOMDocument")
Set objPerson = New Cls_Person ' 生成Cls_Person对象
If Request.Form("btnOk") ＜＞ "" Then
If LoadXmlDoc(objXml, C_XMLFILE, False, strErr) Then ' 装载XML文件
' 给相应的属性赋值
objPerson.Name = CheckStrInput(Request.Form("txtName"))
objPerson.Nick = CheckStrInput(Request.Form("txtNick"))
objPerson.Mobile = CheckStrInput(Request.Form("txtMobile"))
objPerson.Tel = CheckStrInput(Request.Form("txtTel"))
objPerson.Email = CheckStrInput(Request.Form("txtEmail"))
objPerson.QQ = CheckStrInput(Request.Form("txtQQ"))
objPerson.Company = CheckStrInput(Request.Form("txtCompany"))
If Not objPerson.AddToXml(objXml) Then ' 调用Cls_Person类的AddToXml方法，添加数据
AddErr strErr, objPerson.GetLastError
Else
AddErr strErr, "添加成功"
Response.Write "＜script language=""javascript""＞opener.location.reload();＜/script＞"
End If
End If
End If
Set objXml = Nothing%＞＜HTML＞＜HEAD＞＜TITLE＞＜% = C_TITLE %＞＜/TITLE＞＜META HTTP-EQUIV="content-type" CONTENT="text/html;charset=GB2312"/＞＜link rel="stylesheet" href="contact.css" type="text/css"＞＜script language="javascript"＞＜!--function CheckForm(){
return true;}//--＞＜/script＞＜/HEAD＞＜BODY＞＜% = strErr %＞＜div class="title"＞添加联系信息＜/div＞＜form name="form1" method="post" action="add.asp" onsubmit="return CheckForm()"＞
＜table align="center" width="100%" cellspacing="1" cellpadding="2" border="0" bgcolor="#666600"＞
＜tr bgcolor="#ffffff"＞
＜td width="25%" bgcolor="#e5e5e5" align="right"＞＜b＞姓名：＜/b＞＜/td＞
＜td width="75%"＞＜input type="text" name="txtName" size="25" class="input" value="＜%=CheckStrOutput(objPerson.Name)%＞"＞＜/td＞
＜/tr＞
＜tr bgcolor="#ffffff"＞
＜td bgcolor="#e5e5e5" align="right"＞＜b＞英文名：＜/b＞＜/td＞
＜td＞＜input type="text" name="txtNick" size="25" class="input" value="＜%=CheckStrOutput(objPerson.Nick)%＞"＞＜/td＞
＜/tr＞
＜tr bgcolor="#ffffff"＞
＜td bgcolor="#e5e5e5" align="right"＞＜b＞手机：＜/b＞＜/td＞
＜td＞＜input type="text" name="txtMobile" size="25" class="input" value="＜%=CheckStrOutput(objPerson.Mobile)%＞"＞＜/td＞
＜/tr＞
＜tr bgcolor="#ffffff"＞
＜td bgcolor="#e5e5e5" align="right"＞＜b＞电话：＜/b＞＜/td＞
＜td＞＜input type="text" name="txtTel" size="25" class="input" value="＜%=CheckStrOutput(objPerson.Tel)%＞"＞＜/td＞
＜/tr＞
＜tr bgcolor="#ffffff"＞
＜td bgcolor="#e5e5e5" align="right"＞＜b＞Email：＜/b＞＜/td＞
＜td＞＜input type="text" name="txtEmail" size="25" class="input" value="＜%=CheckStrOutput(objPerson.Email)%＞"＞＜/td＞
＜/tr＞
＜tr bgcolor="#ffffff"＞
＜td bgcolor="#e5e5e5" align="right"＞＜b＞QQ：＜/b＞＜/td＞
＜td＞＜input type="text" name="txtQQ" size="25" class="input" value="＜%=CheckStrOutput(objPerson.QQ)%＞"＞＜/td＞
＜/tr＞
＜tr bgcolor="#ffffff"＞
＜td bgcolor="#e5e5e5" align="right"＞＜b＞所在公司：＜/b＞＜/td＞
＜td＞＜input type="text" name="txtCompany" size="25" class="input" value="＜%=CheckStrOutput(objPerson.Company)%＞"＞＜/td＞
＜/tr＞
＜/table＞
＜br＞
＜div align="center"＞
＜input type="submit" name="btnOk" value="提交"＞
＜input type="button" name="btnClose" value="关闭" onclick="javascript:return window.close();"＞
＜/div＞＜/form＞＜/BODY＞＜/HTML＞＜%Set objPerson = Nothing%＞
七、总结
??到此，我们的联系信息管理程序就大功告成了。怎么样，感觉如何，应该来说还是相当简单的吧。当然了，这个例程还有许多可以改进的地方，我这里也只不过是抛砖引玉，希望读者在掌握了XML编程之后，自行修改完善吧。
??此例程已经在我本机（Windows Server 2000、IIS5.0和IE6.0）和网上进行了测试，都能够正常运行。
