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[英]How can I force the browser to open my urls in an existing tab rather than a new one?
[英]How to force Internet Explorer to open it's current running instance rather than creating a new one?
如何以編程方式啟動IE( iexplore.exe
)並在當前運行的實例中導航(通過打開新選項卡或替換當前URL)而不是創建新實例。
我搜索了一個命令行開關,並嘗試使用InternetExplorer.Application
,但無濟於事。
這是我需要的偽 (IE6-IE9會很好):
ShellExecute(Handle, 'open', 'iexplore.exe',
'"http://google.com" -single_instance',
nil, SW_RESTORE);
這是一些代碼來展示我的嘗試。 Delphi中的代碼(部分基於如何從HWND獲取IHTMLDocument2 ):
implementation
uses ShellApi, ComObj, ActiveX, SHDocVw, MSHTML;
function GetIEFromHWND(WHandle: HWND; var IE: IWebbrowser2): Boolean;
type
TObjectFromLResult = function(LRESULT: lResult; const IID: TIID;
wParam: WPARAM; out pObject): HRESULT; stdcall;
var
hInst: HMODULE;
lRes: Cardinal;
Msg: UINT;
pDoc: IHTMLDocument2;
ObjectFromLresult: TObjectFromLresult;
begin
Result := False;
hInst := LoadLibrary('oleacc.dll');
if hInst <> 0 then
try
@ObjectFromLresult := GetProcAddress(hInst, 'ObjectFromLresult');
if @ObjectFromLresult <> nil then
begin
Msg := RegisterWindowMessage('WM_HTML_GETOBJECT');
if SendMessageTimeOut(WHandle, Msg, 0, 0, SMTO_ABORTIFHUNG, 1000, lRes) <> 0 then
if ObjectFromLresult(lRes, IHTMLDocument2, 0, pDoc) = S_OK then
begin
(pDoc.parentWindow as IServiceprovider).QueryService(
IWebbrowserApp, IWebbrowser2, IE);
Result := IE <> nil;
end;
end;
finally
FreeLibrary(hInst);
end;
end;
function GetActiveIEServerWindow(const Activate: Boolean=True): HWND;
var
Wnd, WndChild: HWND;
begin
Result := 0;
Wnd := FindWindow('IEFrame', nil); // top level IE
if Wnd <> 0 then
begin
WndChild := FindWindowEx(Wnd, 0, 'Shell DocObject View', nil);
if WndChild <> 0 then
begin
WndChild := FindWindowEx(WndChild, 0, 'Internet Explorer_Server', nil);
if WndChild <> 0 then
begin
Result := WndChild;
if Activate then
begin
if IsIconic(Wnd) then
ShowWindow(Wnd, SW_RESTORE)
else
SetForegroundWindow(Wnd);
end;
end;
end;
end;
end;
// Method 1
procedure TForm1.Button1Click(Sender: TObject);
const
navOpenInNewTab = $800;
var
IEServerWnd: HWND;
IE: IWebBrowser2;
begin
IEServerWnd := GetActiveIEServerWindow;
if (IEServerWnd <> 0) and GetIEFromHWnd(IEServerWnd, IE) then
begin
// *** this opens the Default browser, e.g Google Chrome
// *** if IE is the Default browser, an empty new window is opened.
OleVariant(IE).Navigate('http://www.yahoo.com', Longint(navOpenInNewTab));
end
else
begin
ShellExecute(Handle, 'open', 'iexplore.exe',
'"http://google.com"',
nil, SW_RESTORE);
end;
end;
procedure InternetExplorerNavigate(URL: WideString);
const
navOpenInNewTab = $800;
var
IE: OleVariant;
begin
try
// *** this always fails (security constraints?)
IE := GetActiveOleObject('InternetExplorer.Application');
except
IE := CreateOleObject('InternetExplorer.Application');
end;
IE.Visible := True;
IE.Navigate(URL, Longint(navOpenInNewTab));
end;
// Method 2
procedure TForm1.Button2Click(Sender: TObject);
begin
InternetExplorerNavigate('http://google.com');
end;
你的方法'1'確實有效。 問題,至少在這里,'Shell DocObject View'窗口不是頂級窗口的直接子窗口。 在IE8中,“Internet Explorer_Server”窗口是“Shell DocObject View”的子窗口,它是“TabWindowClass”的子節點,它是“Frame Tab”的子節點。 如果你可以確認'FindWindowEx'在方法1中返回0,那就是它失敗的原因。 以下是修改為使用EnumChildWindows
的代碼:
function EnumChilds(hwnd: HWND; lParam: LPARAM): BOOL; stdcall;
const
Server = 'Internet Explorer_Server';
var
ClassName: array[0..24] of Char;
begin
GetClassName(hwnd, ClassName, Length(ClassName));
Result := ClassName <> Server;
if not Result then
PLongWord(lParam)^ := hwnd;
end;
function GetActiveIEServerWindow(const Activate: Boolean=True): HWND;
var
Wnd, WndChild: HWND;
begin
Result := 0;
Wnd := FindWindow('IEFrame', nil); // top level IE
if Wnd <> 0 then
begin
// WndChild := FindWindowEx(Wnd, 0, 'Shell DocObject View', nil);
// if WndChild <> 0 then
// begin
// WndChild := FindWindowEx(WndChild, 0, 'Internet Explorer_Server', nil);
WndChild := 0;
EnumChildWindows(Wnd, @EnumChilds, LongWord(@WndChild));
if WndChild <> 0 then
begin
Result := WndChild;
if Activate then
begin
if IsIconic(Wnd) then
ShowWindow(Wnd, SW_RESTORE)
else
SetForegroundWindow(Wnd);
end;
end;
// end;
end;
end;
對於方法'2',我在網上看到一些鏈接,表明IE不支持返回其活動對象的引用,但我沒有任何官方參考。
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