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POImage.GetThumbnailimage method and quality
 

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    <p>I'm having an issue with Getthumbnailimage. The problem is that file sizes of a certain size display very blurry and grainy. Over at <a href="http://msdn.microsoft.com/en-us/library/system.drawing.image.getthumbnailimage.aspx" rel="noreferrer">msdn</a>, it says </p> <blockquote> <p>The GetThumbnailImage method works well when the requested thumbnail image has a size of about 120 x 120 pixels. If you request a large thumbnail image (for example, 300 x 300) from an Image that has an embedded thumbnail, there could be a noticeable loss of quality in the thumbnail image. It might be better to scale the main image (instead of scaling the embedded thumbnail) by calling the DrawImage method.</p> </blockquote> <p>The problem is that drawimage seems to be in windows forms. Is there any way to do this in Webforms? Here's the part of my code. Note: I don't want to get a thumbnail, somebody else wrote this and I just want the actual size displayed, that's all. </p> <pre><code>protected void Page_Load(object sender, System.EventArgs e) { // Put user code to initialize the page here ad a=(ad)Session["a"]; DataView dv=a.AdData.Tables[0].DefaultView; dv.RowFilter="ad_nbr=" + Request.QueryString["l"].Trim(); byte[] MyData= new byte[0]; MyData = (byte[])dv[0]["image"]; System.Web.HttpContext.Current.Response.ContentType = "image/jpeg"; System.Drawing.Image _image = System.Drawing.Image.FromStream(new stem.IO.MemoryStream( (byte[])dv[0]["image"]) ); System.Drawing.Image _newimage = _image.GetThumbnailImage(_image.Width, _image.Height, null, new System.IntPtr() ); _newimage.Save( System.Web.HttpContext.Current.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg ); } </code></pre>
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