How to Reduce loaded image pixel size in RadAsyncUpload.

[Sairam]

Hello telerik team,

I am rad async Upload control...I loaded image  but, I want to reduce pixel size ,i am uploaded picture  how much width and height must and should ..I want to store image in the following pixel sizes "100 width *30 height " ....how reduce pixel size...provide some snippet to me.

  <telerik:RadAsyncUpload runat="server" ID="ImgImages2" AllowedFileExtensions=".jpg,.jpeg,.png,.gif"
                            MaxFileInputsCount="1" Skin="Outlook" Width="350px" PostbackTriggers="PerformInsertButton" />
Insert()

  byte[] fileData;
        if (ImgImages.UploadedFiles.Count > 0)
        {
            UploadedFile file = ImgImages.UploadedFiles[0];
            fileData = new byte[file.InputStream.Length];
            string ImgFileName1 = ImgImages.UploadedFiles[0].FileName;
            file.InputStream.Read(fileData, 0, (int)file.InputStream.Length);
            if (fileData.Length > 1048576)
            {
                RadWindowManager1.RadAlert("The length of the uploaded file must be less than 1 MB", 300, 100, "Check SetUp Signature", null);
                return;
            }
            //string ImgFileName = ImgImages.UploadedFiles[0].FileName;
            oCheck.ImgFileName = ImgFileName1;
            oCheck.Signature = fileData;

        }

How reduce pixel size provide some snippet. and how to covert   "radasyncfile.upload[0].file" to "Image "  fro the above one.

[Sairam]

It directly Not possible....but using    img.thumbnail()  property is possible....complete solution is  available   in codeproject .com.....serach
image resize ..sairam pamid post

[Hristo Valyavicharski]

Hi Sairam,

This online demo shows the same functionality. Code you need is in Handler.ashx.cs. Here is a code snippet:

public Bitmap ResizeImage(Stream stream)
   {
       Image originalImage = Bitmap.FromStream(stream);

       int height = 500;
       int width = 500;

       double ratio = Math.Min(originalImage.Width, originalImage.Height) / (double)Math.Max(originalImage.Width, originalImage.Height);

       if (originalImage.Width > originalImage.Height)
       {
           height = Convert.ToInt32(height * ratio);
       }
       else
       {
           width = Convert.ToInt32(width * ratio);
       }

       Bitmap scaledImage = new Bitmap(width, height);

       using (Graphics g = Graphics.FromImage(scaledImage))
       {
           g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
           g.DrawImage(originalImage, 0, 0, width, height);

           return scaledImage;
       }

   }

Regards,
Hristo Valyavicharski
Telerik