bsp; U_Id           = ''id'';
  U_Name         = ''name'';
  U_Sex          = ''sex'';
  U_Birth        = ''birth'';
  U_Tel          = ''tel'';
  U_Addr         = ''addr'';
  U_PostCode     = ''postcode'';
  U_Email        = ''email'';

//创建一个空XML，如果这个Filename文件已经存在，则覆盖
procedure TXMLOption.CreateBlank(Filename: string);
begin
  FActive:=false;
  FFilename:='''';
  try
    FXMLDoc := CoDOMDocument.Create;
    FXMLDoc.AppendChild(FXMLDoc.CreateProcessingInstruction(XMLTag, XMLPrologAttrs));
    FXMLDoc.AppendChild(FXMLDoc.CreateComment(XMLComment));
    FXMLDoc.AppendChild(FXMLDoc.CreateElement(UserWatcherTag));
    FXMLDoc.AppendChild(FXMLDoc.CreateComment(XMLComment2+datetimetostr(now)));
    FXMLDoc.save(Filename);
    FFilename:=Filename;
    FActive:=true;
  except
    FXMLDoc:=nil;
  end;
end;
//打开一个存在的Filename XML文档
procedure TXMLOption.OpenXml(Filename: string);
begin
  if not Assigned(FXMLDoc) then
  begin
    FXMLDoc := CoDOMDocument.Create;
    if FXMLDoc.Load(Filename) then FActive:=true
    else FActive:=false;
    if FActive then FFilename:=Filename
    else FFilename:='''';
  end;
end;
//关闭一个打开的XML文档
procedure TXMLOption.CloseXml;
begin
  if Assigned(FXMLDoc) then FXMLDoc:=nil;
  FFilename:='''';
  FActive:=false;
end;
procedure TXMLOption.AddSimpleElement(Parent: IXMLDOMElement; Field,Value: string);
var
  Internal: IXMLDOMElement;
begin
  Internal:=IXMLDOMElement(Parent.AppendChild(FXMLDoc.CreateElement(Field)));
  Internal.AppendChild(FXMLDoc.CreateTextNode(Value));
end;
//填加一个节点到后面
procedure TXMLOption.AppendUser(muser:RecUser);
var
  xuser:IXMLDOMElement;
  xroot:IXMLDOMElement;
begin
  if FActive then
  begin
    xroot:=FXMLDoc.documentElement;
    xuser :=IXMLDOMElement(xroot.AppendChild(FXMLDoc.CreateElement(UsersTag)));
    AddSimpleElement(xuser,U_Id,muser.U_Id);
    AddSimpleElement(xuser,U_Name,muser.U_Name);
    AddSimpleElement(xuser,U_Sex,muser.U_Sex);
    AddSimpleElement(xuser,U_Birth,muser.U_Birth);
    AddSimpleElement(xuser,U_Tel,muser.U_Tel);
    AddSimpleElement(xuser,U_Addr,muser.U_Addr);
    AddSimpleElement(xuser,U_PostCode,muser.U_PostCode);
    AddSimpleElement(xuser,U_Email,muser.U_Email);
    FXMLDoc.save(FFilename);