delphi webbrowser用法集錦

時間 2019-12-05

原文原文鏈接

delphi webbrowser用法集錦

(2012-05-13 08:29:00)

標籤：

it

WebBrowser1.GoHome;  //到瀏覽器默認主頁

WebBrowser1.Refresh;  //刷新

WebBrowser1.GoBack;  //後退

WebBrowser1.GoForward;  //前進

WebBrowser1.Navigate('...');  //打開指定頁面

WebBrowser1.Navigate('about:blank');  //打開空頁面

//打開空頁面, 並寫入...



WebBrowser1.Navigate('about:<head><title>標題</title><body>頁面內容</body>');

//讀取網頁腳本中的變量:



procedure TForm1.Button1Click(Sender: TObject);

var

  s: string;

  i: Integer;

begin

  s := WebBrowser1.OleObject.document.Script.str;

  i := WebBrowser1.OleObject.document.Script.num;

  ShowMessage(s);  //Hello

  ShowMessage(IntToStr(i));  //99



  //也能夠這樣讀:

  s := WebBrowser1.OleObject.document.parentWindow.str;

  i := WebBrowser1.OleObject.document.parentWindow.num;

  ShowMessage(s);  //Hello

  ShowMessage(IntToStr(i));  //99

end;

&amp;amp;lt;br&amp;amp;gt;假如網頁中有這樣的語句:&amp;amp;lt;br&amp;amp;gt;&amp;amp;amp;amp;lt;script&amp;amp;amp;amp;gt;&amp;amp;lt;br&amp;amp;gt;var&amp;amp;lt;br&amp;amp;gt;
  str = 
&amp;amp;quot;Hello&amp;amp;quot;;&amp;amp;lt;br&amp;amp;gt;
  i = 
99;&amp;amp;lt;br&amp;amp;gt;&amp;amp;amp;amp;lt;/script&amp;amp;amp;amp;gt;

//調用網頁腳本中的函數:



procedure TForm1.Button1Click(Sender: TObject);

begin

  WebBrowser1.OleObject.document.parentWindow.MB(); //HTML-Js



  //如需指定腳本語言, 須要:

  WebBrowser1.OleObject.document.parentWindow.execScript('MB()','JavaScript'); //HTML-Js

end;

&amp;amp;lt;br&amp;amp;gt;假若有這樣的腳本:&amp;amp;lt;br&amp;amp;gt;&amp;amp;amp;amp;lt;script&amp;amp;amp;amp;gt;&amp;amp;lt;br&amp;amp;gt;function
 MB(){ &amp;amp;lt;br&amp;amp;gt;  
alert('HTML-Js');&amp;amp;lt;br&amp;amp;gt;}&amp;amp;lt;br&amp;amp;gt;&amp;amp;amp;amp;lt;/script&amp;amp;amp;amp;gt;

//判斷網頁及內部框架網頁是否所有下載完畢



procedure TForm1.WebBrowser1DocumentComplete(ASender: TObject;

  const pDisp: IDispatch; var URL: OleVariant);

begin

  if WebBrowser1.Application = pDisp then

  begin

    Text := '網頁下載完畢！';

  end;

end;

//改變背景色或背景圖片:

WebBrowser1.OleObject.document.body.bgcolor := '#FF0000';

WebBrowser1.OleObject.document.body.background := '...圖片地址';

//操做有 ID 標籤的對象:

var

  s: string;

begin

  s := WebBrowser1.OleObject.document.getElementByIdx_x('span1').innerText;

  ShowMessage(s);  //這是 span1 標籤中的內容



  //或者:

  s := WebBrowser1.OleObject.document.parentWindow.span1.innerText;

  ShowMessage(s);  //這是 span1 標籤中的內容



  //隱藏它:

  WebBrowser1.OleObject.document.parentWindow.span1.style.display := 'none';

end;

&amp;amp;lt;br&amp;amp;gt;假如網頁中有這樣的內容:&amp;amp;lt;br&amp;amp;gt;&amp;amp;amp;amp;lt;span
 id=span1&amp;amp;amp;amp;gt;這是 span1 
標籤中的內容&amp;amp;amp;amp;lt;/span&amp;amp;amp;amp;gt;&amp;amp;lt;br&amp;amp;gt;

//獲取網頁源代碼

var

  s: string;

begin

  s := WebBrowser1.OleObject.document.body.innerHTML; //body內的全部代碼

  s := WebBrowser1.OleObject.document.body.outerHTML; //body內的全部代碼, 包含body標籤

  s := WebBrowser1.OleObject.document.documentElement.innerHTML; //html內的全部代碼

end;



//獲取網頁所有源代碼

uses ActiveX;

var

  ms: TMemoryStream;

begin

  if not Assigned(WebBrowser1.Document) then Exit;

  ms := TMemoryStream.Create;

  (WebBrowser1.Document as IPersistStreamInit).Save(TStreamAdapter.Create(ms), True);

  ms.Position := 0;

  Memo1.Lines.LoadFromStream(ms, TEncoding.UTF8);

//  Memo1.Lines.LoadFromStream(ms, TEncoding.Default); {GB2312 等雙字節}

  ms.Free;

end;

//WebBrowser 中的右鍵菜單



//先要添加ApplicationEvents1,指定其Message事件



//屏蔽右鍵菜單

procedure TForm1.ApplicationEvents1Message(var Msg: tagMSG; var Handled: Boolean);

begin

  with Msg do

  begin

    if not IsChild(WebBrowser1.Handle, hWnd) then Exit;

    Handled := (message = WM_RBUTTONDOWN) or (message = WM_RBUTTONUP) or (message = WM_CONTEXTMENU);

  end;

end;



//替換右鍵菜單

procedure TForm1.ApplicationEvents1Message(var Msg: tagMSG; var Handled: Boolean);

var mPoint: TPoint;

begin

  if IsChild(WebBrowser1.Handle, Msg.Hwnd) and

     ((Msg.Message = WM_RBUTTONDOWN) or (Msg.Message = WM_RBUTTONUP)) then

  begin

      GetCursorPos(mPoint);  //獲得光標位置

      PopupMenu1.Popup(mPoint.X, mPoint.Y);   //彈出popupmenu1的菜單

      Handled:=True;

  end;

end;

//新頁面寫入

begin

  WebBrowser1.Navigate('about:blank');

  WebBrowser1.OleObject.Document.Writeln('ok');

end;



//從流中寫入:

var

  ms: TMemoryStream;

begin

  ms := TMemoryStream.Create;

  Memo1.Lines.SaveToStream(ms);

  ms.Position := 0;

  (WebBrowser1.Document as IPersistStreamInit).Load(TStreamAdapter.Create(ms));

  ms.Free;

end;



//禁止提示腳步錯誤

procedure TForm1.WebBrowser1NavigateComplete2(ASender: TObject;

  const pDisp: IDispatch; var URL: OleVariant);

begin

  WebBrowser1.Silent := True;

end;



//禁止彈出窗口

procedure TForm1.WebBrowser1NewWindow2(ASender: TObject; var ppDisp: IDispatch;

  var Cancel: WordBool);

begin

  Cancel := True;

end;

注： 出處 http://blog.sina.com.cn/s/blog_4ad042e50102e0z0.html

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