TWebBrowser控件无法响应回车键怎么办?希望得到一个很妥当的方法
WnEunfn(斯人不语)
好不容易才解决这个问题，由于代码比较长，你要慢慢看吧……
首先：
uses ActiveX;//引用！！
----------------------------------------------------------------
TfrmChildWeb = class(TForm)
WebBrowser: TWebBrowser;//TwebBrowser!!!
procedure FormCreate(Sender: TObject);//必用的一个事件…
private
FOleInPlaceActiveObject: IOleInPlaceActiveObject;
procedure MsgHandler(var Msg: TMsg; var Handled: Boolean);//自定义的一个处理……
public
end;
----------------------------------------------------------------
过程：
procedure TfrmChildWeb.MsgHandler(var Msg: TMsg; var Handled: Boolean);
var
iOIPAO: IOleInPlaceActiveObject;
Dispatch: IDispatch;
begin
if WebBrowser = nil then begin
Handled := False;
Exit;
end;
Handled := (IsDialogMessage(WebBrowser.Handle, Msg) = True);
if (Handled) and (not WebBrowser.Busy) then
begin
if FOleInPlaceActiveObject = nil then
begin
Dispatch := WebBrowser.Application;
if Dispatch <> nil then
begin
Dispatch.QueryInterface(IOleInPlaceActiveObject, iOIPAO);
if iOIPAO <> nil then
FOleInPlaceActiveObject := iOIPAO;
end;
end;
if FOleInPlaceActiveObject <> nil then
if ((Msg.message = WM_KEYDOWN) or (Msg.message = WM_KEYUP)) and
((Msg.wParam = VK_BACK) or (Msg.wParam = VK_LEFT) or (Msg.wParam = VK_RIGHT)) then
else
FOleInPlaceActiveObject.TranslateAccelerator(Msg);
end;
end;
procedure TfrmChildWeb.FormCreate(Sender: TObject);
begin
Application.OnMessage := MsgHandler;
end;
---------------------------------------
Problem:
Web forms that have multiline text boxes and/or Submit buttons do not
respond to the Enter key when displayed on a TWebbrowser.
Also when browsing local folders, some keys don't respond.
How to solve it:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, OleCtrls, SHDocVw, ActiveX;
type
TForm1 = class(TForm)
WebBrowser1: TWebBrowser;
Button1: TButton;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
FOleInPlaceActiveObject: IOleInPlaceActiveObject;
procedure MsgHandler(var Msg: TMsg; var Handled: Boolean);
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormDestroy(Sender: TObject);
begin
FOleInPlaceActiveObject := nil;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Application.OnMessage := MsgHandler;
end;
procedure TForm1.MsgHandler(var Msg: TMsg; var Handled: Boolean);
const
ExtKeys = [VK_DELETE, VK_BACK, VK_LEFT, VK_RIGHT, VK_UP, VK_DOWN,
$30..$39, $41..42, $44..$55, $57, $59..$5A]; { extended keys }
fExtended = $01000000; { extended key flag }
var
IOIPAO: IOleInPlaceActiveObject;
Dispatch: IDispatch;
begin
if WebBrowser1 = nil then
begin
Handled := False;
Exit;
end;
Handled := (IsDialogMessage(WebBrowser1.Handle, Msg) = True);
if (Handled) and (not WebBrowser1.Busy) then
begin
if FOleInPlaceActiveObject = nil then
begin
Dispatch := WebBrowser1.Application;
if Dispatch <> nil then
begin
Dispatch.QueryInterface(IOleInPlaceActiveObject, IOIPAO);
if IOIPAO <> nil then FOleInPlaceActiveObject := IOIPAO;
end;
end;
if FOleInPlaceActiveObject <> nil then
if ((Msg.message = WM_KEYDOWN) or (Msg.message = WM_KEYUP)) and
((Msg.wParam in ExtKeys) and ((Msg.lParam and fExtended) = fExtended)) then
//nothing - do not pass on Backspace, Left or Right arrows
else
FOleInPlaceActiveObject.TranslateAccelerator(Msg);
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
Webbrowser1.Navigate('www.SwissDelphiCenter.ch');
end;
initialization
OleInitialize(nil);
finalization
OleUninitialize
end.