You could find you answers at Chris Khoo post http://www.codeproject.com/aspnet/netimageupload.asp Based in that post i made these two functions for asp.net C#. you must to invoice the public function. The parameters are: MaxWidth = max Width pixels MaxHeight = max height pixels UrlAndFileName = the From address image UrlAndNewFileName = the save address and new file name Example: (600, 600, "C:\Documents and Settings\Barriosj.FMMB\Mis documentos\Mis imágenes\imagenes\73237_4611.jpg", "c:/myRedimImage.jpg") The image is restricted by the smallest width or heigth value. public void Redim_And_SaveImg(int MaxWidth, int MaxHeight, string UrlAndFileName, string UrlAndnewFileName) { // load up the image, figure out a "best fit" // resize, and then save that new image Bitmap OriginalBmp = (System.Drawing.Bitmap)Image.FromFile(UrlAndFileName).Clone(); Size ResizedDimensions = ObtainDim(MaxWidth, MaxHeight, ref OriginalBmp); Bitmap NewBmp = new Bitmap(OriginalBmp, ResizedDimensions); NewBmp.Save(UrlAndnewFileName, System.Drawing.Imaging.ImageFormat.Jpeg); } private static Size ObtainDim(int MaxWidth, int MaxHeight, ref Bitmap Bmp) { int Width; int Height; float Multiplier; Height = Bmp.Height; Width = Bmp.Width; // this means you want to shrink // an image that is already shrunken! if (Height <= MaxHeight && Width <= MaxWidth) return new Size(Width, Height); // check to see if we can shrink it width first Multiplier = (float)((float)MaxWidth / (float)Width); if ((Height * Multiplier) <= MaxHeight) { Height = (int)(Height * Multiplier); return new Size(MaxWidth, Height); } // if we can't get our max width, then use the max height Multiplier = (float)MaxHeight / (float)Height; Width = (int)(Width * Multiplier); return new Size(Width, MaxHeight); } :)
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