c++ builder 中的 XMLDocument 类详解(10) -判断节点类型: 支节点、叶节点、文本节点、空节点

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



#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 *btn_1;

    TButton *btn_2;

    TButton *btn_3;

    TButton *btn_4;

    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);

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");

}

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

/*

什么是支节点与叶节点



没有权威的参考,我的理解是:

包含其他标签的节点是支节点,不包含其他标签的就是叶节点,文本结点不算叶结点

比如根节点下面的第一个节点:

<人员 职务=“科长” 备注=“正局级”>

    <姓名>张三</姓名>

    <性别>男</性别>

    <年龄>34</年龄>

</人员>

"“人员”节点是支结点

"姓名" 、“姓别" " 年龄”是叶节点

叶节点中的部分是文本节点

*/

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

void __fastcall TForm1::btn_1Click(TObject *Sender)

{

    //判断是否是叶节点



    _di_IXMLNode node;



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

    if(node->HasChildNodes&&!(node->IsTextElement))

        ShowMessage("是支节点");

}

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



void __fastcall TForm1::btn_2Click(TObject *Sender)

{

//判断是不是叶节点

    _di_IXMLNode node;



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

    if(node->IsTextElement)

    {

        ShowMessage("是叶节点");

    }

}

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



void __fastcall TForm1::btn_3Click(TObject *Sender)

{

    //是不是文本节点

    _di_IXMLNode node;



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

    //这个张三是文本节点

    if((node->NodeName)==WideString("#text"))

        ShowMessage("文本结点");







}

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



void __fastcall TForm1::btn_4Click(TObject *Sender)

{

//判断是否为空结点

    _di_IXMLNode node;



    //这是根节点的第五个节点,“辅助人员”,xml中设为空

    node=XMLDocument1->DocumentElement->ChildNodes->Nodes[4];

    if((!(node->HasChildNodes))&&(!node->IsTextElement))

        ShowMessage("空结点");



}

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



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