How to Save Image from WebBrowser control

[voo doo12]

Hi everybody. I'm tring to save image form webBrowser control. and i have the following code

mshtml::HTMLDocument^ document = dynamic_castmshtml::HTMLDocument^(this->webBrowser1->Document->DomDocument);
mshtml::IHTMLElementCollection^ collImages = document->getElementsByTagName(L"img");

for (int i = 0; i < collImages->length; ++i)
{
mshtml::IHTMLImgElement^ img = safe_castmshtml::IHTMLImgElement^(collImages->item(nullptr, i));
mshtml::IHTMLElementRender^ render = dynamic_castmshtml::IHTMLElementRender^(img);

Bitmap^ bmp = gcnew Bitmap(img->width, img->height);
Graphics^ g = Graphics::FromImage(bmp);
IntPtr hdc = g->GetHdc();
render->DrawToDC(hdc); //Here is the Error
g->ReleaseHdc(hdc);
delete g; g = nullptr;
bmp->Save(L"C:\\Test\\SaveImage.Jpg", System::Drawing::Imaging::ImageFormat::Jpeg);
}

I get the following error message Error C2664: 'mshtml::IHTMLElementRender::DrawToDC' : cannot convert parameter 1 from 'System::IntPtr' to 'mshtml::_RemotableHandle %' is there any one who knows how to fix this?

[Lost User]

Wrong forum.You should post you question to C++/CLI forum.

Life is a stage and we are all actors!

[voo doo12]

I did. But no one seems to know.

[Lost User]

voo doo12 wrote:

I did. But no one seems to know.

OK. I would advice you to write your own managed wrapper for of IHTMLElementRender interface, never mix managed and unmaged code, and avoid using C++/CLI for anything- it's not stable enough, it's very slow and inefficient, it's dirty.You are supposed to use C# or VB.NET, when you are targeting .NET platform. If you need to create something using C++ you should better use MFC libraries.Good luck.

Life is a stage and we are all actors!

[voo doo12]

Can you show me how I could save image(picture) from webbrowser control using MFC?

[Lost User]

voo doo12 wrote:

Can you show me how I could save image(picture) from webbrowser control using MFC?

Of course I can. In MFC you should use Doc/View framework and CHtmlView class to access HTML using DOM. [EDIT]I used Gdi+ to handle the images[/EDIT] Here is my demo sample:

/*******************************************
This function cames from MS samples
*******************************************/
int GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
{
UINT num = 0; // number of image encoders
UINT size = 0; // size of the image encoder array in bytes

ImageCodecInfo* pImageCodecInfo = NULL;

GetImageEncodersSize(&num, &size);
if(size == 0)
return -1; // Failure

pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
if(pImageCodecInfo == NULL)
return -1; // Failure

GetImageEncoders(num, size, pImageCodecInfo);

for(UINT j = 0; j < num; ++j)
{
if( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 )
{
*pClsid = pImageCodecInfo[j].Clsid;
free(pImageCodecInfo);
return j; // Success
}
}

free(pImageCodecInfo);
return -1; // Failure
}

void CWebBrowserAppView::OnFileSave()
{
LPDISPATCH pDisp=GetHtmlDocument();

IHTMLDocument2\* pDoc;
HRESULT hr=0;

    hr=pDisp->QueryInterface(IID\_IHTMLDocument2,(void\*\*)&pDoc);
if(FAILED(hr))
{
	pDisp->Release();
	AfxMessageBox(L"Sorry dude, cast failed!");
	return;
}

IHTMLElementCollection\* pImgs;
hr=pDoc->get\_images(&pImgs);
if(FAILED(hr))
{
	pDoc->Release();
        pDisp->Release();
	AfxMessageBox(L"Sorry dude, can't get images list from document!");
	return;
}


long length;
pImgs->get\_length(&length);

IDispatch \*pdImg;
    IHTMLImgElement \*pImg;

CLSID jpgClsid;
GetEncoderClsid(L"image/jpeg", &jpgClsid);



for(int i=0;i<length;i++)
{
	\_variant\_t index = i;
            hr = pImgs->item( index, index, &pdImg);
            if(SUCCEEDED(hr))
	{
		hr= pdImg->QueryInterface( IID\_IHTMLImgElement,  (void \*\*) &pImg);

		 if(SUCCEEDED(hr))
		 {
					long width,height;
					pImg->get\_width(&width);
					pImg->get\_height(&height);

					IHTMLElementRender\* pRend;
					hr=pImg->QueryInterface(IID\_IHTMLElementRender,(void\*\*)&pRend);
					if(SUCCEEDED(hr))
					{
							Bitm

[voo doo12]

Thanks very much. I'm not familiar with MFC but I will be. Thanks again

[Lost User]

You are always wellcome.Study hard and you will get results.

Life is a stage and we are all actors!