delphi WebBrowser的使用方法详解


网页代码：

1.webbrowser执行网页中的JS函数

如果要执行TouchRefresh(1)函数：

webbrowser1.oleobject.document.parentwindow.ExecScript(‘TouchRefresh(1)’,'Javascript');

webbrowser执行自己的JS函数：
wb1.OleObject.document.parentwindow.ExecScript('alert(''自定义函数');','javascript');

方法2：

wb1.Navigate('javascript:alert(''执行成功!'');');

2.webbrowser选择下拉列表

var

ole : olevariant

begin

ole := webbrowser1.oleobject.document.GetElementByID('fy');

ole.value := 60; //下拉框用value,复选框和多选框用checked:='true'

ole.onchange; //调用onchange事件

end;

3.webbrowser按照Form提交（针对提交按钮无id和name的情况）

网页代码：

提交方法：

webbrowser1.OleObject.document.forms.item('loginForm').submit;

4.webbrowser去掉滚动条

在download事件中：
webbrowser1.oleobject.Document.body.Scroll := 'no';
webbrowser1.oleobject.Document.documentElement.style.overflow := 'hidden';

webbrowser控制滚动条滚动：
webbrowser1.OleObject.document.parentwindow.scrollby(0,100);//第一个参数横向，第二个竖向 scrollby滚动多少
webbrowser1.OleObject.document.parentwindow.scrollto(0,1000);// scrollto滚动到某个位置

5.webbrowser屏蔽鼠标右键 TEmbeddedWB设置DisabledPopupMenuItems属性

webbrowser1.DisabledPopupMenuItems := [rcmDefault,rcmImage,rcmControl,rcmTable,rcmSelText,rcmAnchor,rcmUnKnown,rcmImageArt,rcmImgDynSrc,rcmDebug,rcmAll]

6.webbrowser屏蔽网页图片 TEmbeddedWB设置DownloadImages属性

webbrowser1.DownloadOptions := [];

7.webbrowser按照元素的属性获取元素

function GetDocLinkByHref(doc : IHTMLDocument2;str_url:string):IHTMLAnchorElement;

var
i : Integer;
label_iDispatch : iDispatch;
label_element : IHTMLAnchorElement; //引用mshtml
begin
Result := nil;

doc := webbrowser1.document as Ihtmldocument2;
if not Assigned(doc) then
Exit;
for i:=0 to doc.links.length-1 do
begin
label_iDispatch := doc.links.item(i,0);
label_element := doc.links.item(I,0) as IHTMLAnchorElement;
if (AnsiPos(str_url,(doc.links.item(I,0) as IHTMLElement).getAttribute('tag',0))>0)
then
begin
Result := label_element;
Break;
end;
end;
end;

8.webbrowser TEmbededwb屏蔽弹窗并捕获弹窗信息 //在 TEmbededwb的OnShowMessage事件中处理

procedure TForm1.wb1NavigateComplete2(Sender: TObject;
const pDisp: IDispatch; var URL: OleVariant);
VAR
str_url : string;
begin
Wb1.OleObject.document.parentWindow.execScript('window.alert=null;','JavaScript');
Wb1.OleObject.document.parentWindow.execScript('window.open=null;','JavaScript');
Wb1.OleObject.document.parentWindow.execScript('window.close=null;','JavaScript');
Wb1.OleObject.document.parentWindow.execScript('window.showModalDialog=null;','JavaScript');
Wb1.OleObject.document.parentwindow.execscript('function confirm() {return true;}','Javascript');
end;

function TForm1.webbrowser1ShowMessage(Sender: TObject; HWND: Cardinal; lpstrText, lpstrCaption: PWideChar; dwType: Integer; lpstrHelpFile: PWideChar;

dwHelpContext: Integer; var plResult: Integer): HRESULT;
begin
plResult := IDOK; //屏蔽alert\open\close等弹窗
Result := S_OK; //屏蔽confirm确认框，并点击确认
mmo1.Lines.Add(lpstrText); //lpstrText即为捕获到的弹窗内容
end;

屏蔽WebBrowser页面中的声音

procedure CloseSound;

var

hWinmm: Cardinal;

pwaveOutWrite: Pointer;

lp: Cardinal;

begin

hWinmm := LoadLibrary('Winmm.dll');

if hWinmm > 0 then

pwaveOutWrite := GetProcAddress(hWinmm, 'waveOutOpen');

if pwaveOutWrite <> nil then begin

VirtualProtect(pwaveOutWrite, 3, PAGE_EXECUTE_READWRITE, lp);

Move(#$C2#$18#$00, pwaveOutWrite^, 3);

end;

end;

//强制Webbroser使用IE8内核 SetWBCoreIE8(8000);

procedure SetWBCoreIE8(i_value:Integer);

var
str_exeName : string;
reg : TRegistry;
begin
try
str_exeName := RightFromStr(Application.ExeName,'\',False);
reg := TRegistry.Create;
reg.RootKey := HKEY_LOCAL_MACHINE;
if reg.OpenKey('Software\Microsoft\Internet Explorer\Main\FeatureControl', False) then
begin
if not reg.KeyExists('FEATURE_BROWSER_EMULATION') then
reg.CreateKey('FEATURE_BROWSER_EMULATION');
end;
reg.CloseKey;
if reg.OpenKey('Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION', False) then
begin
reg.WriteInteger(str_exeName,i_value);
// if not reg.ValueExists(str_exeName) then
// begin
// reg.WriteInteger(str_exeName,i_value);
// end;
end;
reg.CloseKey;
reg.Free;
except
end;
end;