看了先進的webbrowser 編碼, 但還是有問題.... |
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尚未結案
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tunnerking
一般會員   發表：8 回覆：1 積分：1 註冊：2003-12-29 發送簡訊給我 |
我試著把這個function 放到新的project用, 絕對沒有問題!
procedure BrowserHtml();
var
hr: HRESULT;
pUnkBrowser, pUnkDisp: IUnknown;
pStream: IStream;
hHTMLText: HGLOBAL;
pHtmlDoc: IDispatch;
pPersistStreamInit: IPersistStreamInit;
szHTMLText: PChar; Null : Variant;
const
IID_IPersistStreamInit: TGUID = (
D1:$7FD52380;D2:$4E07;D3:$101B;D4:($AE,$2D,$08,$00,$2B,$2E,$C7,$13)); begin
//
try
szHTMLText:=PChar('<html>hihihihih</html>');
hHTMLText := GlobalAlloc(GPTR, StrLen(szHTMLText) 1);
if (hHTMLText = Null) then Exit;
lstrcpy(pchar(hHTMLText), szHTMLText);
hr := CreateStreamOnHGlobal(hHTMLText, TRUE, pStream);
pHtmlDoc := webContent.Document;
hr := pHtmlDoc.QueryInterface(IID_IPersistStreamInit, pPersistStreamInit); if (SUCCEEDED(hr)) then
begin
hr := pPersistStreamInit.InitNew;
if (SUCCEEDED(hr)) then
begin
hr := pPersistStreamInit.Load(pStream);
end;
pPersistStreamInit := nil;
end; finally
end; end; //========================================================= 但是當我加到另一個program裏時, 就出現error!
Project abc.exe raised exception class EAccessViolation with message 'Access violation at address 635F544C in module 'mshtml.dll'. Read of address 000000'. Process stopped . Use step or run to continue.
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David
一般會員 發表：13 回覆：26 積分：7 註冊：2002-04-14 發送簡訊給我 |
你好，如果你確認你的mshtml.dll沒壞掉（因為網路上有人說這檔案會壞掉，跟ＩＥ有關，如果壞掉需衝灌ＩＥ），要不要再注意看看我做修改的部分，試試能不能ｒｕｎ：
不一樣的部分有兩個：
１ 在Form的Create event下增加一行code
webContent.Navigate('about:blank'); ２ REMARK掉NULL的宣告，不過這可能是因為你用了Delphi6（我猜的）的原因，我是用Delphi5，所以不需要這行，所以如果我猜對的話，這行應該不需要變更。 ３ 最後再查閱最上面的uses部分，是否有遺漏。 Lucky. ＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝ unit Unit1; interface uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
OleCtrls, SHDocVw, ActiveX, StdCtrls; type
TForm1 = class(TForm)
webContent: TWebBrowser;
Button1: TButton;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
procedure BrowserHtml();
end; var
Form1: TForm1; implementation {$R *.DFM} procedure TForm1.BrowserHtml();
var
hr: HRESULT;
pUnkBrowser, pUnkDisp: IUnknown;
pStream: IStream;
hHTMLText: HGLOBAL;
pHtmlDoc: IDispatch;
pPersistStreamInit: IPersistStreamInit;
szHTMLText: PChar; //Null : Variant;
const
IID_IPersistStreamInit: TGUID = (
D1:$7FD52380;D2:$4E07;D3:$101B;D4:($AE,$2D,$08,$00,$2B,$2E,$C7,$13)); begin //
try
szHTMLText:=PChar('hihihihih');
hHTMLText := GlobalAlloc(GPTR, StrLen(szHTMLText) 1);
if (hHTMLText = Null) then Exit;
lstrcpy(pchar(hHTMLText), szHTMLText);
hr := CreateStreamOnHGlobal(hHTMLText, TRUE, pStream);
pHtmlDoc := webContent.Document;
hr := pHtmlDoc.QueryInterface(IID_IPersistStreamInit, pPersistStreamInit); if (SUCCEEDED(hr)) then
begin
hr := pPersistStreamInit.InitNew;
if (SUCCEEDED(hr)) then
begin
hr := pPersistStreamInit.Load(pStream);
end;
pPersistStreamInit := nil;
end; finally
end; end;
procedure TForm1.Button1Click(Sender: TObject);
begin
BrowserHtml;
end; procedure TForm1.FormCreate(Sender: TObject);
begin
webContent.Navigate('about:blank');
end; end. 發表人 - David 於 2004/02/28 03:31:36
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favinc
一般會員 發表：22 回覆：19 積分：8 註冊：2003-03-11 發送簡訊給我 |
以下代码可供参考： unit Unit1; interface uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, OleCtrls, SHDocVw, StdCtrls, activex, stdactns, mshtml; type
TForm1 = class(TForm)
Button1: TButton;
WebBrowser1: TWebBrowser;
Button2: TButton;
Memo1: TMemo;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
ms: TMemoryStream;
public
{ Public declarations }
end; var
Form1: TForm1; implementation {$R *.dfm} procedure DispHtmlFromText(const WebBrowser: TWebBrowser; const Text: string);
var
hr: HRESULT;
pStream: IStream;
hHTMLText: HGLOBAL;
// pHtmlDoc: IDispatch;
pPersistStreamInit: IPersistStreamInit;
const
IID_IPersistStreamInit: TGUID = '{7FD52380-4E07-101B-AE2D-08002B2EC713}'; //(D1: $7FD52380; D2: $4E07; D3: $101B; D4: ($AE, $2D, $08, $00, $2B, $2E, $C7, $13));
begin
hHTMLText := GlobalAlloc(GPTR, StrLen(Pchar(Text)) 1);
if (hHTMLText = NULL) then Exit;
lstrcpy(Pchar(hHTMLText), Pchar(Text));
hr := CreateStreamOnHGlobal(hHTMLText, TRUE, pStream);
hr := WebBrowser.Document.QueryInterface(IID_IPersistStreamInit, pPersistStreamInit);
if (Succeeded(hr)) then
begin
hr := pPersistStreamInit.InitNew;
if (Succeeded(hr)) then
begin
hr := pPersistStreamInit.Load(pStream);
end;
pPersistStreamInit := nil;
end;
end; procedure DispHtmlFromStream(const WebBrowser: TWebBrowser; const MStream: TStream);
var
hr: HRESULT;
pStream: IStream;
pPersistStreamInit: IPersistStreamInit;
const
IID_IPersistStreamInit: TGUID = '{7FD52380-4E07-101B-AE2D-08002B2EC713}'; // (D1: $7FD52380; D2: $4E07; D3: $101B; D4: ($AE, $2D, $08, $00, $2B, $2E, $C7, $13));
begin
if MStream = nil then Exit;
hr := WebBrowser.Document.QueryInterface(IID_IPersistStreamInit, pPersistStreamInit);
if (Succeeded(hr)) then
begin
hr := pPersistStreamInit.InitNew;
if (Succeeded(hr)) then
begin
pStream := TStreamAdapter.Create(MStream);
hr := pPersistStreamInit.Load(pStream);
end;
pPersistStreamInit := nil;
end;
end; procedure TForm1.Button1Click(Sender: TObject);
begin
ms.Clear;
with TFileOpen.Create(self) do
try
dialog.Filter := '*.htm;*.html|*.htm;*.html';
if dialog.Execute then
begin
ms.LoadFromFile(dialog.FileName);
DispHtmlFromStream(WebBrowser1, ms);
end;
finally
Free;
end;
end; procedure TForm1.FormCreate(Sender: TObject);
begin
WebBrowser1.Navigate('about:blank');
ms := TMemoryStream.Create;
end; procedure TForm1.FormDestroy(Sender: TObject);
begin
ms.Free;
end; procedure TForm1.Button2Click(Sender: TObject);
var
doc: IHTMLDocument2;
all: IHTMLElementCollection;
len, I: integer;
item: OleVariant;
begin
doc := WebBrowser1.Document as IHTMLDocument2;
all := doc.Get_links;
len := all.length;
for I := 0 to len - 1 do
begin
item := all.item(I, varempty);
Memo1.lines.add(item.href);
end;
end; end. 兵临城下，快活如故。
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兵临城下，快活如故。 |
發表時間：2004-02-18 11:15:14
IP:202.64.xxx.xxx 未訂閱
系統時間：2024-11-22 12:07:29
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