How to capture image from WebBrowser control? - DOTNET

The code snippet below will capture the rendered HTML page. You can adapt
it to your needs:

[Guid("3050f669-98b5-11cf-bb82-00aa00bdce0b"),
InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown),
ComVisible(true),
ComImport
]
interface IHTMLElementRender
{
void DrawToDC([In] IntPtr hDC);
void SetDocumentPrinter([In, MarshalAs(UnmanagedType.BStr)] string
bstrPrinterName, [In] IntPtr hDC);
}

private void axWebBrowser1_DocumentComplete(object sender,
AxSHDocVw.DWebBrowserEvents2_DocumentCompleteEvent e)
{
AxSHDocVw.AxWebBrowser wb = (AxSHDocVw.AxWebBrowser)sender;
IHTMLDocument3 doc = (IHTMLDocument3)wb.Document;
if ( doc != null )
{
IHTMLElement3 el = (IHTMLElement3)doc.documentElement;

if ( el != null )
{
IHTMLElementRender Render = (IHTMLElementRender)el;
Graphics g = Graphics.FromImage(bm); // a bitmap object that was
previously created to the desired width, height and bit depth.
IntPtr hdc = g.GetHdc();
Render.DrawToDC(hdc);
g.ReleaseHdc(hdc);
g.Dispose();
Marshal.ReleaseComObject(Render);
bm.Save(@"test.bmp",ImageFormat.Bmp);
}
}
}

"StartPixel" <alex@waveglobal.nl> wrote in message
news:1150380786.067068.65110@r2g2000cwb.googlegroups.com...
> Hello all,
>
> I need to develop a small application that browses webpages
> automatically and saves the images found on those pages. Probably you
> would say: iterate the HtmlElements collection, find the value of the
> SRC attribute, load each image using its corresponding URL and then
> save it.
>
> That doesn't work unfortunately, because the images are generated
> dynamically when requesting the webpage.
>
> What I did is the following:
> - Browse to the desired webpage in a WebBrowser control
> - Hide all elements except the desired image
> - Resize the WebBrowser to display the full image
>
> I can't manage to capture the displayed image from the WebBrowser
> control. My WebBrowser control is named wbBrowser
>
> What I tried is the following:
>
> Graphics g = wbBrowser.CreateGraphics();
> Bitmap bmp = new Bitmap(width, height);
> g.DrawImage(bmp, 1, 1, width, height);
> bmp.Save("C:\\test_file.jpg",System.Drawing.Imaging.ImageFormat.get_Jpeg());
> g.Dispose();
>
> It does save the file, but it is completely blank. Its background color
> is black and I see nothing of the 'captured' image in it. I also tried
> to save as bitmap. It saves the file, also completely blank, but with a
> grey background color.
>
> File size is 9KB using either JPG or BMP format.
>
> What am I doing wrong here?
>
> If I'm correct, it should be possible to capture the displayed contents
> of the WebBrowser control as a bitmap and save that to a file.
>
> Any help would be greatly appreciated.
>
> Thank you all very much in advance!
>
> Regards,
>
> Alex
>

hai , i have done it in visual basic.


you can mail me at somala_pratap@yahoo.co.in

thnaks
pratap
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hai

i have done it in visual basic.

you can mail me at somala_pratap@yahoo.co.in

thanks

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