在delphi中使用xml文档有两种方法，一是使用delphi 内置的xml broker；一是使用msxml.dll 。
例:
unit showxml;
interface
uses classes httpapp db dbclient midas
xmlbrokr webcomp miditems;
type
tcustomshowxmlbutton = class(txmlbutton iscriptcomponent)
protected
xmlmethodname: string;
{ iscriptcomponent }
procedure addelements(addintf: iaddscriptelements);
function getsubcomponents: tobject;
{ iwebcontent implementation }
function implcontent(options: twebcontentoptions;
parentlayout: tlayout): string; override;
end;
tshowxmlbutton = class(tcustomshowxmlbutton)
public
constructor create(aowner: tcomponent); override;
published
property custom;
property style;
property stylerule;
property caption;
property xmlbroker;
property xmluseparent;
end;
tshowdeltabutton = class(tcustomshowxmlbutton)
public
constructor create(aowner: tcomponent); override;
published
property custom;
property style;
property stylerule;
property caption;
property xmlbroker;
property xmluseparent;
end;
implementation
uses sysutils midprod;
resourcestring
sshowxml = 'show xml';
sshowdelta = 'show delta';
procedure tcustomshowxmlbutton.addelements(
addintf: iaddscriptelements);
begin
addintf.addincludefile('xmlshow.js');
end;
function tcustomshowxmlbutton.getsubcomponents: tobject;
begin
result := nil;
end;
function tcustomshowxmlbutton.implcontent(options: twebcontentoptions;
parentlayout: tlayout): string;
var
attrs: string;
intf: ilayoutwebcontent;
formvarname: string;
rowsetvarname: string;
begin
addquotedattrib(attrs 'name' name);
addquotedattrib(attrs 'style' style);
addquotedattrib(attrs 'class' stylerule);
addquotedattrib(attrs 'value' self.caption);
addcustomattrib(attrs custom);
if assigned(xmldata.xmlbroker) then
begin
formvarname := xmldata.xmlbroker.submitformvarname;
rowsetvarname := xmldata.xmlbroker.rowsetvarname(nil); // row row set var name
end;
if not (conoscript in options.flags) then
result :=
format(''#13#10
[attrs rowsetvarname xmlmethodname sxmlreadyvar])
else
result :=
format(''#13#10
[attrs]);
if assigned(parentlayout) and parentlayout.getinterface(ilayoutwebcontent intf) then
result := intf.layoutbutton(result getlayoutattributes);
end;
{ tshowxmlbutton }
constructor tshowxmlbutton.create(aowner: tcomponent);
begin
inherited;
defaultcaption := sshowxml;
xmlmethodname := 'root';
end;
{ tshowdeltabutton }
constructor tshowdeltabutton.create(aowner: tcomponent);
begin
inherited;
defaultcaption := sshowdelta;
xmlmethodname := 'getdelta()';
end;
二 使用msxml.dll
例：
....
procedure tdhedform.openbtnclick(sender: tobject);
var
pvin : olevariant;
prompt : olevariant;
begin
pvin := '';
prompt := true;
dhtmledit1.loaddocument(pvin prompt);
end;
procedure tdhedform.savebtnclick(sender: tobject);
var
vo vb : olevariant;
begin
vo := dhtmledit1.currentdocumentpath;
if (vo <> '') then
begin
vb := false;
end
else
begin
vo := '';
vb := true;
end;
dhtmledit1.savedocument(vo vb);
end;
procedure tdhedform.saveasclick(sender: tobject);
var
vo vb : olevariant;
begin
vo := '';
vb := true;
dhtmledit1.savedocument(vo vb);
end;
...
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