unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    XMLDocument1: TXMLDocument;
    Memo1: TMemo;
    Button1: TButton;
    Button2: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(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;


//添加
procedure TForm1.Button1Click(Sender: TObject);
var
  newNode, newNodeAdd: IXMLNode;
begin
  newNode := XMLDocument1.DocumentElement.AddChild('人员');
  newNode.Attributes['职务'] := '秘书';

  newNodeAdd := newNode.AddChild('姓名');
  newNodeAdd.Text := '小翠';

  newNodeAdd := newNode.AddChild('性别');
  newNodeAdd.Text := '女';

  Memo1.Lines := XMLDocument1.XML; {查看}
  {会在尾部增加:
  	<人员 职务="秘书"><姓名>小翠</姓名><性别>女</性别></人员>
  }
end;


//删除
procedure TForm1.Button2Click(Sender: TObject);
var
  nodeList: IXMLNodeList;
begin
  nodeList := XMLDocument1.DocumentElement.ChildNodes;
  nodeList.Delete(nodeList.Count-1); {删除最后一条}

  Memo1.Lines := XMLDocument1.XML; {查看}
end;

end.