BarCodes with tall BarHeight gets "blurry" and not readable

We are having an issue with C1BarCode for .NET 2.0, v. 2.0.20083.26, when moving the ASP.NET application from a Windows 2003 x32 server with IIS 6, to a Windows 2008 x64 Server with IIS7.

The exact same application seems to work on 2003 32-bits server, and is not working on 2008 server. Se results below. Is this a known bug ?

When setting the BarHeight property to a value so that the length of the printed BarCode is like 50 - 60 cm long, the printed BarCode gets blurry and not readable. If setting the component to have a normal Barcode of 2 cm length, it is printed crisp and clear and fully readable. 

We are putting the C1BarCode component on a literal in a webpage and "rendering"  using a routine like:

if (bc.Image != null)
{
     // create a bitmap the same size as the barcode image
     Rectangle rc = new Rectangle(Point.Empty, bc.Image.Size);
     Bitmap bmp = new Bitmap(rc.Width, rc.Height);
     // paint the bitmap background white
     using (Graphics g = Graphics.FromImage(bmp))
     {
          g.FillRectangle(Brushes.White, rc);
          g.DrawImage(bc.Image, rc);
     }
     // write the bitmap to the output stream in gif format
     Response.ContentType = "image/gif";
     bmp.Save(Response.OutputStream, ImageFormat.Gif);
     Response.Flush();
}

Regards,

Swan B

The Graphics.DrawImage method will stretch the image to fill the destination rectangle. That process usually makes edges blurry, especially if you are stretching the image.

I suggest you try the Graphics. DrawImageUnscaled method instead.