public static Bitmap MakeGrayscale(Bitmap original) { //make an empty bitmap the same size as original Bitmap newBitmap = new Bitmap(original.Width, original.Height); for (int i = 0; i < original.Width; i++) { for (int j = 0; j < original.Height; j++) { //get the pixel from the original image Color originalColor = original.GetPixel(i, j); //create the grayscale version of the pixel int grayScale = (int)((originalColor.R * .3) + (originalColor.G * .59) + (originalColor.B * .11)); //create the color object Color newColor = Color.FromArgb(grayScale, grayScale, grayScale); //set the new image's pixel to the grayscale version newBitmap.SetPixel(i, j, newColor); } } return newBitmap; } I AM PASSING VALUES TO THIS METHOD AS: protected void grayscale_Click(object sender, EventArgs e) { //Get the path of image file string path = Image1.ImageUrl; //create bitmap from path and pass as argument to function makegryscale2 Bitmap b = MakeGrayscale(new Bitmap(path.Substring(2))); //overwrite with saving at same path b.Save(path); //set it imageurl Image1.ImageUrl = path; }
grayscale_Click
var
This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)