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Dear Sir,

How to reduce image size in with same clarity
I am uploading image using file upload control.
its size Example:
My Image Size is => 1 MB to 3MB.
it will reduce below 100 KB size.

it will display same clarity what image original size is.

Please tell me how to make a code for reduce image size???

Posted 8-Apr-12 22:42pm
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Solution 2

Use following function to reduce image size. It will regenerate image with defined height and width.
public static void ResizeImage(string image, string Okey, string key, int width, int height, string newimagename)
        System.Drawing.Image oImg = System.Drawing.Image.FromFile(HttpContext.Current.Server.MapPath("~/" + ConfigurationManager.AppSettings[Okey] + image));
        System.Drawing.Image oThumbNail = new System.Drawing.Bitmap(width, height);//, System.Drawing.Imaging.PixelFormat.Format24bppRgb

        System.Drawing.Graphics oGraphic = System.Drawing.Graphics.FromImage(oThumbNail);
        oGraphic.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
        //set smoothing mode to high quality
        oGraphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
        //set the interpolation mode
        oGraphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
        //set the offset mode
        oGraphic.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
        System.Drawing.Rectangle oRectangle = new System.Drawing.Rectangle(0, 0, width, height);
        oGraphic.DrawImage(oImg, oRectangle);
        if (newimagename == "")
            if (image.Substring(image.LastIndexOf(".")) != ".png")
                oThumbNail.Save(HttpContext.Current.Server.MapPath("~/" + ConfigurationManager.AppSettings[Okey] + image), System.Drawing.Imaging.ImageFormat.Jpeg);
                oThumbNail.Save(HttpContext.Current.Server.MapPath("~/" + ConfigurationManager.AppSettings[Okey] + image), System.Drawing.Imaging.ImageFormat.Png);
            if (newimagename.Substring(newimagename.LastIndexOf(".")) != ".png")
                oThumbNail.Save(HttpContext.Current.Server.MapPath("~/" + ConfigurationManager.AppSettings[Okey] + newimagename), System.Drawing.Imaging.ImageFormat.Jpeg);
                oThumbNail.Save(HttpContext.Current.Server.MapPath("~/" + ConfigurationManager.AppSettings[Okey] + newimagename), System.Drawing.Imaging.ImageFormat.Png);
Member 9534579 at 23-Oct-13 3:52am
What we use in place of HttpContext?
Member 9534579 at 23-Oct-13 3:56am
What parameters we need to pass when we call this method to another method for imgae saving?
Mukund Thakker at 23-Oct-13 5:43am
int iMinAircraftImgWidth = 500;
int iMinAircraftImgHeight = 372;
ResizeImage(imagename, "imagepath", "imagepath", iMinAircraftImgWidth, iMinAircraftImgHeight, strNewFileName);
Member 9534579 at 23-Oct-13 7:33am
Member 10752740 at 16-Apr-14 3:59am
i want only reduce image file size
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Solution 1

Use following code to reduce size without loss of clarity
Image img;
mohankumar345 at 9-Apr-12 5:27am
My image sizes, I declared Only 100px * 100px.
Then how to make it reply me.
Muralikrishna8811 at 9-Apr-12 5:29am
then replace 400 with 100
by default it takes as pixels
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Solution 3

A very simple way to decrease size of an image or generating a thumbnail
check this out
Creating Thumbnail Image by keeping Aspect Ratio using C#
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Solution 4


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