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.