c++ builder 中的 XMLDocument 类详解(6) - 访问节点属性

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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

    TButton *btn_1;

    TButton *btn_2;

    TButton *btn_3;

    TXMLDocument *XMLDocument1;

    void __fastcall FormCreate(TObject *Sender);

    void __fastcall btn_1Click(TObject *Sender);

    void __fastcall btn_2Click(TObject *Sender);

    void __fastcall btn_3Click(TObject *Sender);

private:	// User declarations

public:		// User declarations

    __fastcall TForm1(TComponent* Owner);

};

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

extern PACKAGE TForm1 *Form1;

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

#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;

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

__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::btn_1Click(TObject *Sender)

{

    //获取根元素属性

    _di_IXMLNodeList nodeList;

    _di_IXMLNode node;



    //根结点有几个属性

    ShowMessage(IntToStr(XMLDocument1->DocumentElement->AttributeNodes->Count));



    //通过属性名访问属性, 一般用 Attributes['属性名']}

    ShowMessage(XMLDocument1->DocumentElement->Attributes["备注"]);



    //通过属性位置访问属性, 必须用 AttributeNodes->noces[位置ID]

    ShowMessage(XMLDocument1->DocumentElement->AttributeNodes->Nodes[0]->Text);



    //但通过 AttributeNodes['属性名'] 也可以访问属性, 譬如

    ShowMessage(XMLDocument1->DocumentElement->AttributeNodes->FindNode("备注")->Text);



    //AttributeNodes 是某个节点的属性列表, 它也是一个节点列表对象, 譬如

    nodeList=XMLDocument1->DocumentElement->AttributeNodes;

    node=nodeList->Nodes[0];

    ShowMessage(node->Text);

    node=nodeList->FindNode("备注");

    ShowMessage(node->Text);

}

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void __fastcall TForm1::btn_2Click(TObject *Sender)

{

    //访问第二个人的属性信息

    _di_IXMLNodeList nodeList;

    _di_IXMLNode node;



    nodeList=XMLDocument1->DocumentElement->ChildNodes;

    node=nodeList->Nodes[1];



    ShowMessage(IntToStr(node->AttributeNodes->Count));

    ShowMessage(node->Attributes["职务"]);   //副科长

    ShowMessage(node->AttributeNodes->Nodes[0]->Text); //副科长



}

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void __fastcall TForm1::btn_3Click(TObject *Sender)

{

    //访问某个结点的所有属性

    _di_IXMLNodeList nodeList;

    _di_IXMLNode node;

    int num;



    nodeList=XMLDocument1->DocumentElement->ChildNodes;

    node=nodeList->Nodes[0];

    num=node->AttributeNodes->Count;



    for(int i=0;i<num;i++)//这不是num-1

        ShowMessage(node->AttributeNodes->Nodes[i]->Text);//分别显示:科长 正局级

}

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