将HTML表单数据存储为XML格式(2)

网络整理 - 09-14

     文档被存档之后，如果你再打开这个文档，那么则会以如下代码列表形式出现：

  MyXMLDoc.xml:

  <?xml version="1.0"?>
  <rootElement>
  <childElement1 />
  <childElement2 />
  </rootElement>

  　　在"MyXMLDoc.xml"文档中，childElement1 和 childElement2 会以空的elements形式出现。如果它们被赋值，那么每个值都将由标记符括起来。

  　　现在，让我们来思考一下如何将HTML数据写到XML文档中去。我们已经知道该如何创建和存储XML文档。将一个表单数据写到XML文档中去的过程，现在已演变成为Request Object"s Form Collection以及将每一个表单域的value书定到XML element value 中去的步骤重复。以上可以通过ASP来完成。

  例：将数据输送到XML

  　　现在，我们举一个普通的HTML表单的例子来说明。此Form有用户名，地址，电话，以及E-MAIL等几个域。并将这些信息写入XML文件中并保存。

  EnterContact.html:
  <html>
  <head>
  <title>
  Contact Information
  </title>
  </head>
  <body>
  <form action="processForm.asp" method="post">

  <h3>请输入你的联系方式</h3>
  First Name: <input type="text"><br>
  Last Name: <input type="text"><br>
  Address #1: <input type="text"><br>
  Address #2: <input type="text"><br>
  Phone Number: <input type="text"><br>
  E-Mail: <input type="text"><br>
  <input type="submit" value="Submit"><br>
  </form>
  </body>
  </html>

  　　将Form 中数据发送到processForm.asp.。这是一个ASP页面，在这个ASP中将反复调用同一个函数将form数据写入XML文件。

  processForm.asp:

  <%
  "--------------------------------------------------------------------
  "The "ConvertFormtoXML" Function accepts to parameters.
  "strXMLFilePath - The physical path where the XML file will be saved.
  "strFileName - The name of the XML file that will be saved.
  "--------------------------------------------------------------------

  Function ConvertFormtoXML(strXMLFilePath, strFileName)

  "Declare local variables.

  Dim objDom
  Dim objRoot
  Dim objField
  Dim objFieldValue
  Dim objattID
  Dim objattTabOrder
  Dim objPI
  Dim x

  "Instantiate the Microsoft XMLDOM.

  Set objDom = server.CreateObject("Microsoft.XMLDOM")

  objDom.preserveWhiteSpace = True

  "Create your root element and append it to the XML document.

  Set objRoot = objDom.createElement("contact")
  objDom.appendChild objRoot

  "Iterate through the Form Collection of the Request Object.

  For x = 1 To Request.Form.Count

  "Check to see if "btn" is in the name of the form element.
  "If it is, then it is a button and we do not want to add it
  "to the XML document.

  If instr(1,Request.Form.Key(x),"btn") = 0 Then

  "Create an element, "field".

  Set objField = objDom.createElement("field")

  "Create an attribute, "id".

  Set objattID = objDom.createAttribute("id")

  "Set the value of the id attribute equal the the name of

  "the current form field.

  objattID.Text = Request.Form.Key(x)

  "The setAttributeNode method will append the id attribute
  "to the field element.

  objField.setAttributeNode objattID

  "Create another attribute, "taborder". This just orders the
  "elements.

  Set objattTabOrder = objDom.createAttribute("taborder")

  "Set the value of the taborder attribute.

  objattTabOrder.Text = x

  "Append the taborder attribute to the field element.

  objField.setAttributeNode objattTabOrder

  "Create a new element, "field_value".

  Set objFieldValue = objDom.createElement("field_value")

  "Set the value of the field_value element equal to
  "the value of the current field in the Form Collection.

  objFieldValue.Text = Request.Form(x)

  "Append the field element as a child of the root element.

  objRoot.appendChild objField

  "Append the field_value element as a child of the field elemnt.

  objField.appendChild objFieldValue
  End If
  Next

  "Create the xml processing instruction.

  Set objPI = objDom.createProcessingInstruction("xml", "version="1.0"")

  "Append the processing instruction to the XML document.

  objDom.insertBefore objPI, objDom.childNodes(0)

  "Save the XML document.

  objDom.save strXMLFilePath & "\" & strFileName

  "Release all of your object references.

  Set objDom = Nothing
  Set objRoot = Nothing
  Set objField = Nothing
  Set objFieldValue = Nothing
  Set objattID = Nothing
  Set objattTabOrder = Nothing
  Set objPI = Nothing
  End Function

  "Do not break on an error.

  On Error Resume Next

  "Call the ConvertFormtoXML function, passing in the physical path to
  "save the file to and the name that you wish to use for the file.

  ConvertFormtoXML "c:","Contact.xml"

  "Test to see if an error occurred, if so, let the user know.
  "Otherwise, tell the user that the operation was successful.

  If err.number <> 0 then
  Response.write("Errors occurred while saving your form submission.")
  Else
  Response.write("Your form submission has been saved.")
  End If
  %>