Main methods and implementation of XML file operations using ASP

ASP uses xmldom to operate XML files on the server. xml files have many advantages over access in terms of retrieval and update for small data volumes. I have tested whether to use a database and store all the Website member information, product data information, transaction information, and website customization information in three XML files. The running result is normal, it seems that it is much faster than the database, but it is not tested and cannot be determined.

The following describes how to create, query, modify, and perform XML operations.

'Create a DOM object

Set objdom = server. Createobject ("Microsoft. xmldom ")

'Retrieve XML data

'Method 1: Get the XML data of the XML file

Objdom. Load ("C: \ test. xml ")

'Method 2: Get the data of the XML data string
Objdom. loadxml ("<people> <man name =" SD "/> </People> ")

'Create a Node object

Set newnode = objdom. createelement ("people ")

'Return value to this node

Newnode. Text = "person"

'Add attributes to this node

Set newattride = objdom. createnode ("attribute", "name ","")
Newattri. Text = "James"
Newnode. setattributenode newattribute

'Add a subnode to this node

Set newnodechild = objdom. createelement ("Address ")
Newnode. appendchild newnodechild

'Save this Node object

Objdom. appendchild newnode
Objdom. Save ("C: \ test. xml ")

'Look up a Node object

Set objtofind=objdom.doc umentelement. selectsinglenode ("// people/Man ")
'Get the node name, node value, attribute value, and all XML of the Node object.
Nodename = objtofind. nodename
Nodevalue = objtofind. Text
Objtofind. getattributenode ("name"). nodevalue

'Retrieve an attribute Node object

Set objattrtofind=objdom.doc umentelement. selectsinglenode ("// people/Man"). getattributenode ("name ")
'Retrieve the attribute name and attribute value of this node.
Nodeattrname = objattrtofind. nodename
Nodeattrvalue = objattrtofind. nodevalue

'Delete a Node object

Set objnode1_objdom.doc umentelement. selectsinglenode ("// people/Man") 'node to be deleted
Set objparentnode1_objdom.doc umentelement. selectsinglenode ("// people") 'parent node of the node to be deleted

Objparentnode. removechild objnode

'Retrieve the byte point set of a node

Set objnodesnodes objdom.doc umentelement. selectsinglenode ("// people/Man"). childnodes
Traverse this set
Method 1
For each element in objnodes
Response. Write element. nodename byte name
Response. Write element. Text byte point value
Next
Method 2
Domlength = objnodes. Length
For I = 0 to domlength-1
Response. Write objnodes. childnodes (I). nodename byte name
Response. Write objnodes. childnodes (I). Text byte point value
Next

'Retrieve the attribute set of a node
Set objnodesincluobjdom.doc umentelement. selectsinglenode ("// people/Man"). getattributenode ("name"). Attributes
Traverse this set
For each element in objnodes
Response. Write element. nodename attribute name
Response. Write element. nodevalue Attribute Value
Next

If You Can skillfully use xmldom objects to operate XML files, you can enjoy XMLHTTP objects to implement many functions under ASP.