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ASP实用大全-实战ASP(8)


出处:互联网   整理: 软晨网(RuanChen.com)   发布: 2009-11-03   浏览: 180 ::
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使用ASP、VB和XML建立运行于互联网上的应用程序(2)

      在实际的编程过程中,你们应当使用一些方法使应用程序更加有高效性。你可以把ASP中的关于取得数据的代码端搬到一个COM应用程序中去然后创建一个XSLT变换来显示返回的数据。好,我不多说了,现在你所要做的就是试一试吧!

   Option Explicit
   Private RCommands As Recordset
   Private RCustomers As Recordset
   Private RCust As Recordset
   Private sCustListCommand As String
   Private Const dataURL = "http://localhost/XHTTPRequest/getData.asp"
   Private arrCustomerIDs() As String
   Private Enum ActionEnum
   VIEW_HISTORY = 0
   VIEW_RECENT_PRODUCT = 1
  End Enum

  Private Sub dgCustomers_Click()
   Dim CustomerID As String
   CustomerID = RCustomers("CustomerID").Value
   If CustomerID <> "" Then
    If optAction(VIEW_HISTORY).Value Then
     Call getCustomerDetail(CustomerID)
    Else
     Call getRecentProduct(CustomerID)
    End If
   End If
  End Sub

  Private Sub Form_Load()
   Call initialize
   Call getCustomerList
  End Sub

  Sub initialize()
   ' 从数据库返回命令名和相应的值

   Dim sXML As String
   Dim vRet As Variant
   Dim F As Field
   sXML = "<?xml version=""1.0""?>"
   sXML = sXML & "<command><commandtext>Initialize</commandtext>"
   sXML = sXML & "<returnsdata>True</returnsdata>"
   sXML = sXML & "</command>"
   Set RCommands = getRecordset(sXML)
   Do While Not RCommands.EOF
    For Each F In RCommands.Fields
     Debug.Print F.Name & "=" & F.Value
    Next
    RCommands.MoveNext
   Loop
  End Sub

  Function getCommandXML(command_name As String) As String
   RCommands.MoveFirst
   RCommands.Find "command_name='" & command_name & "'", , adSearchForward, 1
   If RCommands.EOF Then
    MsgBox "Cannot find any command associated with the name '" & command_name & "'."
    Exit Function
   Else
    getCommandXML = RCommands("command_xml")
   End If
  End Function

  Sub getRecentProduct(CustomerID As String)
   Dim sXML As String
   Dim xml As DOMDocument
   Dim N As IXMLDOMNode
   Dim productName As String
   sXML = getCommandXML("RecentPurchaseByCustomerID")
   Set xml = New DOMDocument
   xml.loadXML sXML
   Set N = xml.selectSingleNode("command/param[name='CustomerID']/value")
   N.Text = CustomerID
   Set xml = executeSPWithReturn(xml.xml)
   productName = xml.selectSingleNode("values/ProductName").Text
   ' 显示text域
   txtResult.Text = ""
   Me.txtResult.Visible = True
   dgResult.Visible = False
   ' 显示product名
   txtResult.Text = "最近的产品是: " & productName
  End Sub

  Sub getCustomerList()
   Dim sXML As String
   Dim i As Integer
   Dim s As String
   sXML = getCommandXML("getCustomerList")
   Set RCustomers = getRecordset(sXML)
   Set dgCustomers.DataSource = RCustomers
  End Sub

  Sub getCustomerDetail(CustomerID As String)
   ' 找出列表中相关联的ID号
   Dim sXML As String
   Dim R As Recordset
   Dim F As Field
   Dim s As String
   Dim N As IXMLDOMNode
   Dim xml As DOMDocument
   sXML = getCommandXML("CustOrderHist")
   Set xml = New DOMDocument
   xml.loadXML sXML
   Set N = xml.selectSingleNode("command/param[name='CustomerID']/value")
   N.Text = CustomerID
   Set R = getRecordset(xml.xml)
   ' 隐藏 text , 因为它是一个记录集
   txtResult.Visible = False