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POUsing WebRequest to save URL as Image thumbnail in VB.NET
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copied!<p>I'm trying to write a simple routine where I pass it a URL and it goes and renders the content of the webresponse as a jpg. I found a solution somehwere in C# and ported it to vb.net, however when I run it, it throws an argumentexception "parameter is not valid" when trying to instantiate the image. Can someone take a look at the following code and let me know if I'm on the right track?</p> <pre><code>Sub SaveUrl(ByVal aUrl As String) Dim response As WebResponse Dim remoteStream As Stream Dim readStream As StreamReader Dim request As WebRequest = WebRequest.Create(aUrl) response = request.GetResponse remoteStream = response.GetResponseStream readStream = New StreamReader(remoteStream) Dim img As System.Drawing.Image = System.Drawing.Image.FromStream(remoteStream) img.Save(aUrl & ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg) response.Close() remoteStream.Close() readStream.Close() End Sub </code></pre> <p><strong>To Clarify:</strong> Yes, I know i need a LOT more code to accomplish what I want to do, which is to render/take a screen capture of a URL (html, images, all the markup, everything) and save it as a jpg thumbnail. </p> <p>If you've used Google Chrome, you've seen the launch page that has thumbnails of all the sites you use frequently. Something like that.</p> <p><strong>Update:</strong> Ok I've found commercial paid products to accomplish this, like <a href="http://www.websitesscreenshot.com/Index.html" rel="nofollow noreferrer">http://www.websitesscreenshot.com/Index.html</a> but no open source implementations. </p>

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