How to reduce image size in asp.net with same clarity

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Dear Sir,

How to reduce image size in asp.net 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.

and
it will display same clarity what image original size is.

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

By

Posted 8-Apr-12 22:42pm

Mohankumar.Engain

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4 solutions

Solution 1

Hi
Use following code to reduce size without loss of clarity

C#

Image img;
            img.GetThumbnailImage(400,400,null,IntPtr.Zero)

Posted 8-Apr-12 22:54pm

Muralikrishna8811

Comments

Mohankumar.Engain 9-Apr-12 5:27am

My image sizes, I declared Only 100px * 100px.
Then how to make it reply me.

Muralikrishna8811 9-Apr-12 5:29am

then replace 400 with 100
by default it takes as pixels

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#

Posted 9-Mar-14 2:25am

Preet Kamal

Updated 9-Mar-14 19:18pm

v2

Solution 4

check this

Reduce image size/ Generate thumbnails

Posted 9-Sep-14 23:24pm

Jitendra Kumar Gangwar

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Mukund Thakker · Accepted Answer · 2012-04-09T01:11:00

Use following function to reduce image size. It will regenerate image with defined height and width.

C#

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);
            else
                oThumbNail.Save(HttpContext.Current.Server.MapPath("~/" + ConfigurationManager.AppSettings[Okey] + image), System.Drawing.Imaging.ImageFormat.Png);
        }
        else
        {
            if (newimagename.Substring(newimagename.LastIndexOf(".")) != ".png")
                oThumbNail.Save(HttpContext.Current.Server.MapPath("~/" + ConfigurationManager.AppSettings[Okey] + newimagename), System.Drawing.Imaging.ImageFormat.Jpeg);
            else
                oThumbNail.Save(HttpContext.Current.Server.MapPath("~/" + ConfigurationManager.AppSettings[Okey] + newimagename), System.Drawing.Imaging.ImageFormat.Png);
        }
        oImg.Dispose();
    }