xml
He Zhidan
We build an XML file, as shown in the figure:
First, establish a dialog-based program, the project is called XML;
Second, initialize OL.
Bool cxmlapp :: initInstance ()
{
Afxoleinit ();
.......
}
Third, add a button in the dialog, ID is IDC_CREATE, and we generate an XML file in this button's response function.
Void cxmldlg :: oncreate ()
{
Msxml2 :: ixmldomdocumentptr pdoc;
Msxml2 :: ixmldomelementptr xmlroot;
// Create a DomDocument object
HRESULT HR = PDoc.createInstance (__ uuidof (msxml2 :: domdocument30));
IF (! succeeded (hr))
{
MessageBox ("Unable to create a DomDocument object, please check if the MS XML Parser running is installed!");
}
// Name of the root node is China
PDOC-> Raw_createElement ((_ BSTR_T) (char *) "China", & XMLROOT);
PDOC-> Raw_AppendChild (XMLROOT, NULL);
Msxml2 :: ixmldomelementptr childNode;
PDOC-> Raw_createElement ((_ bstr_t) (char *) "city", & childnode);
ChildNode-> Puttext ("wuhan"); // node value
ChildNode-> SetAttribute ("Population", "8,000,000"); // Property name, attribute value
ChildNode-> SetAttribute ("Area", "10000");
XMLROOT-> appendchild (childnode);
PDOC-> Raw_createElement ((_ bstr_t) (char *) "city", & childnode);
ChildNode-> Puttext ("Shanghai");
ChildNode-> SetAttribute ("Population", "12,000,000");
ChildNode-> SetAttribute ("Area", "12000");
XMLROOT-> appendchild (childnode);
/ / Save to the file
// If there is no existence, it is created.
PDOC-> Save ("f: //he.xml");
}
Don't forget #import "msxml4.dll" // introduced type library
4. Add a button, ID is IDC_GET, read the XML file in the response function of this button.
Void cxmldlg :: ONGET ()
{
// Create a DomDocument object
Msxml2 :: ixmldomdocumentptr pdoc;
HRESULT HR = PDoc.createInstance (__ uuidof (msxml2 :: domdocument30));
IF (! succeeded (hr))
{
MessageBox ("Unable to create a DomDocument object, please check if the MS XML Parser running is installed!");
}
// Load file
PDOC-> LOAD ("f: //he.xml");
// Find a node called City, "//" is shown in any layer.
MSXML2 :: ixmldomelementptr childNode; childNode = (msxml2 :: ixmldomelementptr) (pdoc-> selectsinglenode ("// city");
// Get a node type
MSXML2 :: Domnodetype NodetyPE;
ChildNode-> Get_NodetyPE (& nodetype);
// node name
BSTR var;
CString name;
ChildNode-> Get_Nodename (& var);
Name = (char *) (_ BSTR_T) VAR;
// node value
Variant Varval;
ChildNode-> Get_NodetyPedValue (& VARVAL);
CString strval = (char *) (_ BSTR_T) VARVAL;
// Node property, put it in the list
Msxml2 :: ixmldomnamednodemapptr patts = null;
Msxml2 :: ixmldomnodeptr pattritem;
ChildNode-> Get_attributes;
Long ncount;
PATTRS-> GET_LENGTH (& NCOUNT);
For (int i = 0; i { PATTRS-> GET_ITEM (I, & PatTritem); / / We can get the property name and attribute value through the function get_nodename, get_nodetypedValue. / / Can also be directly obtained CString StrattrName = (char *) (_ BSTR_T) Pattritem-> Nodename; CString StrattrValue = (char *) (_ bstr_t) Pattritem-> NodetypedPalue; } }
