Delphi 中的 XMLDocument 类详解(6) - 访问节点属性

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, xmldom, XMLIntf, msxmldom, XMLDoc, StdCtrls;

type
  TForm1 = class(TForm)
    XMLDocument1: TXMLDocument;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

//打开
procedure TForm1.FormCreate(Sender: TObject);
begin
  XMLDocument1.LoadFromFile('c:\temp\test.xml');
  {必须用万一提供的 xml 测试文件, 才能有相同的返回值}
end;


//获取根元素属性
procedure TForm1.Button1Click(Sender: TObject);
var
  nodeList: IXMLNodeList;
  node: IXMLNode;
begin
  ShowMessage(IntToStr(XMLDocument1.DocumentElement.AttributeNodes.Count)); {1}

  ShowMessage(XMLDocument1.DocumentElement.Attributes['备注']);             {测试}
  {通过属性名访问属性, 一般用 Attributes['属性名']}

  ShowMessage(XMLDocument1.DocumentElement.AttributeNodes[0].Text);         {测试}
  {通过属性位置访问属性, 必须用 AttributeNodes[位置ID]}
  {但通过 AttributeNodes['属性名'] 也可以访问属性, 譬如:}
  ShowMessage(XMLDocument1.DocumentElement.AttributeNodes['备注'].Text);    {测试}

  {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[0];
  ShowMessage(node.Text); {测试}
  node := nodeList['备注'];
  ShowMessage(node.Text); {测试}
end;


//访问第二个人的属性信息
procedure TForm1.Button2Click(Sender: TObject);
var
  nodeList: IXMLNodeList;
  node: IXMLNode;
begin
  nodeList := XMLDocument1.DocumentElement.ChildNodes;
  node := nodeList[1];

  ShowMessage(IntToStr(node.AttributeNodes.Count)); {1}
  ShowMessage(node.Attributes['职务']);             {副科长}
  ShowMessage(node.AttributeNodes[0].Text);         {副科长}
end;


//访问某个节点的所有属性
procedure TForm1.Button3Click(Sender: TObject);
var
  nodeList: IXMLNodeList;
  node: IXMLNode;
  num,i: Integer;
begin
  nodeList := XMLDocument1.DocumentElement.ChildNodes;
  node := nodeList[0];
  num := node.AttributeNodes.Count;

  for i := 0 to num - 1 do
  begin
    ShowMessage(node.AttributeNodes[i].Text); {会分别显示: 科长 正局级}
  end;
end;

end.