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

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

#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

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

#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::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);
}
//---------------------------------------------------------------------------



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

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