在delphi中使用xml文档有两种方法

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 。

一  使用xml broker, 是delphi 内置的

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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