黄聪：Delphi 中的 XMLDocument 类详解(20) - 动态建立 XMLDocument 对象

unit Unit1;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Button3: TButton;
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}

//使用 TXMLDocument 类
procedure TForm1.Button1Click(Sender: TObject);
var
xmlDoc: TXMLDocument;
begin
xmlDoc := TXMLDocument.Create(nil);
xmlDoc.LoadFromFile('c:\temp\test.xml');
ShowMessage(FormatXMLData(xmlDoc.XML.Text));
FreeAndNil(xmlDoc);
end;


//使用 IXMLDocument 接口
procedure TForm1.Button2Click(Sender: TObject);
var
xmlDoc: IXMLDocument;
begin
xmlDoc := TXMLDocument.Create(nil);
xmlDoc.LoadFromFile('c:\temp\test.xml');
ShowMessage(FormatXMLData(xmlDoc.XML.Text));
xmlDoc := nil;
end;


//使用 IXMLDocument 接口的 NewXMLDocument 方法
procedure TForm1.Button3Click(Sender: TObject);
var
xmlDoc: IXMLDocument;
begin
xmlDoc := NewXMLDocument;
xmlDoc.LoadFromFile('c:\temp\test.xml');
ShowMessage(FormatXMLData(xmlDoc.XML.Text));
xmlDoc := nil;
end;

end.

出处:http://www.cnblogs.com/del/archive/2008/01/08/1029692.html