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");

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

posted @ 2011-06-08 22:41  瓜蛋  阅读(987)  评论(0编辑  收藏  举报