TXMLDocument use case (C++)

Description

This example illustrates the basic operations on an XML document.

Code

#include <vcl.h>
#pragma hdrstop
 
#include <tchar.h>
#include <XMLDoc.hpp>
#include <XMLIntf.hpp>
#include <ComObj.hpp>
#include <stdio.h>
 
#pragma argsused
 
void CreateDocument();
void RetrieveDocument();
 
int _tmain(int argc, _TCHAR* argv[]) {
 
        CoInitializeEx(NULL, 0);
 
        try {
                CreateDocument();
                RetrieveDocument();
        }
        catch (Exception &ex) {
                printf("Exception message: %ls\n", ex.Message);
        }
 
        return 0;
}
 
void CreateDocument() {
        const _TCHAR* filename = _TEXT("file.xml");
 
        _di_IXMLDocument document = interface_cast<Xmlintf::IXMLDocument>
                (new TXMLDocument(NULL));
        document->Active = true;
 
        // Define document content.
        document->DocumentElement = document->CreateNode("ThisIsTheDocumentElement",
                ntElement, "");
        document->DocumentElement->Attributes["attrName"] = "attrValue";
        _di_IXMLNode nodeElement = document->DocumentElement->AddChild
                ("ThisElementHasText", -1);
        nodeElement->Text = "Inner text.";
        _di_IXMLNode nodeCData = document->CreateNode("any characters here",
                ntCData, "");
        document->DocumentElement->ChildNodes->Add(nodeCData);
        _di_IXMLNode nodeText = document->CreateNode("This is a text node.",
                ntText, "");
        document->DocumentElement->ChildNodes->Add(nodeText);
 
        document->SaveToFile(filename);
}
 
void RetrieveDocument() {
        const _TCHAR* filename = _TEXT("file.xml");
 
        const _di_IXMLDocument document = interface_cast<Xmlintf::IXMLDocument>
                (new TXMLDocument(NULL));
        document->LoadFromFile(filename);
 
        // Find a specific node.
        const _di_IXMLNode nodeElement =
                document->ChildNodes->FindNode("ThisIsTheDocumentElement");
 
        if (nodeElement != NULL) {
                // Get a specific attribute.
                puts("Getting attribute...");
                const _TCHAR* attrName = _TEXT("attrName");
                if (nodeElement->HasAttribute(attrName)) {
                        const _TCHAR* attrValue = nodeElement->Attributes[attrName];
                        printf("Attribute value: %ls\n", attrValue);
                }
 
                // Traverse child nodes.
                puts("\nTraversing child nodes...");
                for (int i = 0; i < nodeElement->ChildNodes->Count; i++) {
                        const _di_IXMLNode node = nodeElement->ChildNodes->Get(i);
                        // Display node name.
                        printf("Node name: %ls\n", node->NodeName);
                        // Check if the node type is Text.
                        if (node->NodeType == ntText) {
                                // Display node text.
                                printf("\tThis is a node of type Text. The text is: %ls\n",
                                        node->Text);
                        }
                        // Check if the node is text element.
                        if (node->IsTextElement) {
                                printf("\tThis is a text element. The text is: %ls\n",
                                        node->Text);
                        }
                }
        }
}

Uses

• XMLDoc.TXMLDocument ( FR | DE | JP )