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

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#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



}

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