Delphi 中的 XMLDocument 類詳解(20) – 動態建立 XMLDocument 對象

unit Unit1;interfaceuses  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 類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 介面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 介面的 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.