C++ builder 中的 XMLDocument 类详解(18) NodeValue 与 NodeName 的读写区别

//---------------------------------------------------------------------------

#ifndef Unit1H
#define Unit1H
//---------------------------------------------------------------------------
#include <Classes.hpp>
#include <Controls.hpp>
#include <StdCtrls.hpp>
#include <Forms.hpp>
#include <msxmldom.hpp>
#include <XMLDoc.hpp>
#include <xmldom.hpp>
#include <XMLIntf.hpp>
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:	// IDE-managed Components
    TXMLDocument *XMLDocument1;
    TButton *btn1;
    TButton *btn2;
    TButton *btn3;
    void __fastcall FormCreate(TObject *Sender);
    void __fastcall btn1Click(TObject *Sender);
private:	// User declarations
public:		// User declarations
    __fastcall TForm1(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::FormCreate(TObject *Sender)
{
    XMLDocument1->LoadFromFile("D:\\code\\B_C_B\\XMLDocument\\test.xml");
}
//---------------------------------------------------------------------------

void __fastcall TForm1::btn1Click(TObject *Sender)
{
    _di_IXMLNode node;

    node=XMLDocument1->DocumentElement;
    node=node->ChildNodes->Nodes[0];//第一个人员节点

    //属性值 nodevalue是可读写的
    ShowMessage(node->AttributeNodes->operator [](0)->NodeValue);
    node->AttributeNodes->operator [](0)->NodeValue=(WideString)("正科长");
    ShowMessage(node->AttributeNodes->operator [](0)->NodeValue);

    //属性nodename是只读的
    ShowMessage(node->AttributeNodes->operator [](0)->NodeName);
    //node->AttributeNodes->operator [](0)->NodeName="xxx",企图修改会出错

    node=node->ChildNodes->operator [](0);//现在node指向了第一个人员张三的姓名节点

    //节点值:nodeValue是可读写的
    ShowMessage(node->NodeValue); //张三
    node->NodeValue=(WideString)"张老三";
    ShowMessage(node->NodeValue);//张老三

    //节点名称 nodename是只读的
    ShowMessage(node->NodeName);//姓名
//    node->NodeName="XXX"   企图修改会出错

}
//---------------------------------------------------------------------------