I have err in this thumbnail function ...? RSS

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  venkatu2005

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  I have err in this thumbnail function ...?

  Sep 13, 2008 07:12 AM|LINK

   Hi

   i have reduce the image by passing two parameter to this function

  but it shows : parameter is not valid.

    Public Shared Function ResizeImage_default(ByVal imageFile() As Byte, ByVal targetSize As Integer) As Byte()
          Using oldImage As System.Drawing.Image = System.Drawing.Image.FromStream(New MemoryStream(imageFile))  --- ERR:Throw Exception in thisLine
              Dim newSize As Size = CalculateDimensions(oldImage.Size, targetSize)
              newSize.Height = 777
              newSize.Width = 574
              Using newImage As Bitmap = New Bitmap(newSize.Width, newSize.Height, PixelFormat.Format24bppRgb)
                  Using canvas As Graphics = Graphics.FromImage(newImage)
                      canvas.SmoothingMode = SmoothingMode.HighQuality
                      canvas.InterpolationMode = InterpolationMode.HighQualityBicubic
                      canvas.PixelOffsetMode = PixelOffsetMode.HighQuality
                      canvas.DrawImage(oldImage, New Rectangle(New Point(0, 0), newSize))
                      Dim m As New MemoryStream
                      newImage.Save(m, ImageFormat.Jpeg)
                      Return m.GetBuffer
                  End Using
              End Using
          End Using
      End Function
   

  Let me know the reason ?

  can anyone give solution for this..? 

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  Thanks.
  
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  Coool

  Contributor

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  687 Posts

  Re: I have err in this thumbnail function ...?

  Sep 13, 2008 10:15 AM|LINK

  http://www.glennjones.net/Post/799/Highqualitydynamicallyresizedimageswithnet.htm

  Please mark as Answer if it helps u. Thanks!
  
  Parth Patel
  Software Engineer
  • Edited by Hong-Gang Chen - MSFT on Sep 18, 2008 03:04 AM
  • Edited by venkatu2005 on Sep 18, 2008 05:30 AM
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  venkatu2005

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  32487 Points

  6742 Posts

  Re: I have err in this thumbnail function ...?

  Sep 18, 2008 05:31 AM|LINK

  Hi

  Anyone tell what's the error in the above function..

  or else let anyone give the code for resize the image in vb.net ,

  here i have passed the byte array... 

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  Thanks.