c++ builder 中的 XMLDocument 类详解(12) -关于 XML 属性

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#ifndef Unit1H

#define Unit1H

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#include <Classes.hpp>

#include <Controls.hpp>

#include <StdCtrls.hpp>

#include <Forms.hpp>

#include <msxmldom.hpp>

#include <XMLDoc.hpp>

#include <xmldom.hpp>

#include <XMLIntf.hpp>

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class TForm1 : public TForm

{

__published:	// IDE-managed Components

    TButton *btn_1;

    TButton *btn_2;

    TButton *btn_3;

    TButton *btn_4;

    TButton *btn_5;

    TXMLDocument *XMLDocument1;

    TMemo *Memo1;

    void __fastcall FormCreate(TObject *Sender);

    void __fastcall btn_1Click(TObject *Sender);

    void __fastcall btn_2Click(TObject *Sender);

    void __fastcall btn_3Click(TObject *Sender);

    void __fastcall btn_4Click(TObject *Sender);

    void __fastcall btn_5Click(TObject *Sender);

private:	// User declarations

public:		// User declarations

    __fastcall TForm1(TComponent* Owner);

};

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extern PACKAGE TForm1 *Form1;

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#endif

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#include <vcl.h>

#pragma hdrstop



#include "Unit1.h"

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#pragma package(smart_init)

#pragma resource "*.dfm"

TForm1 *Form1;

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__fastcall TForm1::TForm1(TComponent* Owner)

    : TForm(Owner)

{

}

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void __fastcall TForm1::FormCreate(TObject *Sender)

{

    XMLDocument1->LoadFromFile("D:\\code\\B_C_B\\XMLDocument\\test.xml");

}

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



void __fastcall TForm1::btn_1Click(TObject *Sender)

{

// XMLDocument1对象的XML属性

    //u前面我们经常用这句代码，因为lines与xml同属于 TStrings

    Memo1->Lines= XMLDocument1->XML;



    //如果不怕麻烦，可以这样写

    Memo1->Lines->Text=XMLDocument1->XML->Text;



    //如果知道了这一点，那xml属性的功能可就多了，并且这里的xl属性是可写的

    //不过这里要谈的是结点的xml属性

}

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void __fastcall TForm1::btn_2Click(TObject *Sender)

{

    //根节点的xml属性



    _di_IXMLNode node;

    node=XMLDocument1->DocumentElement;



    //这句话有误，是因为XML是WideString类型

//    Memo1->Lines=node->XML;



    //所以应该写成这样

    Memo1->Lines->Text=node->XML;



    //还有一个更大的区别，节点的xml是只读的

}

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void __fastcall TForm1::btn_3Click(TObject *Sender)

{

    //子节点的xml属性



    _di_IXMLNode node;

    node=XMLDocument1->DocumentElement->ChildNodes->Nodes[0];



    Memo1->Lines->Text=node->XML;//会显示一个子结点的全部

}

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void __fastcall TForm1::btn_4Click(TObject *Sender)

{

    //属性的xml属性

    _di_IXMLNode node;



    node=XMLDocument1->DocumentElement;

    node=node->AttributeNodes->Nodes[0];

    ShowMessage(node->NodeName);//备注

    ShowMessage(node->NodeValue);//测试



    //用xml属性一次把他们都读出来

    ShowMessage(node->XML);



}

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void __fastcall TForm1::btn_5Click(TObject *Sender)

{

    //叶节点的xml属性

    _di_IXMLNode node;

    node=XMLDocument1->DocumentElement;

    node=node->ChildNodes->Nodes[0];

    node=node->ChildNodes->Nodes[0];

    node=node->ChildNodes->Nodes[0];//这就是叶节点



    ShowMessage(node->XML);

    //这时的xml属性和text属性一样了

    ShowMessage(node->Text);

}

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