A Prototype of Mobile Client for E-commerce Application

<%@ Page Language="C#" AutoEventWireup="true" Theme="" ContentType="image/jpeg" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Imaging" %>

<script runat="server">
    void Page_Load()
    {
        try
        {
            Response.Clear();
            string productId = Request["id"];
            string path = Server.MapPath(Path.GetDirectoryName(Request.Path)) + "\\" + Request["id"] + ".jpg";
            Bitmap bmp = CreateThumbnail(path, Int32.Parse(Request["w"]), Int32.Parse(Request["h"]));
            bmp.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
            bmp.Dispose();
        }
        catch (Exception ex)
        {
            Response.StatusDescription = ex.Message;
        }
    }

    public static Bitmap CreateThumbnail(string lcFilename, int lnWidth, int lnHeight)
    {

        System.Drawing.Bitmap bmpOut = null;
        Bitmap loBMP = new Bitmap(lcFilename);
        ImageFormat loFormat = loBMP.RawFormat;

        decimal lnRatio;
        int lnNewWidth = 0;
        int lnNewHeight = 0;

        if (loBMP.Width < lnWidth && loBMP.Height < lnHeight)
            return loBMP;


        if (loBMP.Width > loBMP.Height)
        {
            lnRatio = (decimal)lnWidth / loBMP.Width;
            lnNewWidth = lnWidth;
            decimal lnTemp = loBMP.Height * lnRatio;
            lnNewHeight = (int)lnTemp;
        }
        else
        {
            lnRatio = (decimal)lnHeight / loBMP.Height;
            lnNewHeight = lnHeight;
            decimal lnTemp = loBMP.Width * lnRatio;
            lnNewWidth = (int)lnTemp;
        }

        bmpOut = new Bitmap(lnNewWidth, lnNewHeight);
        Graphics g = Graphics.FromImage(bmpOut);
        g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
        g.FillRectangle(Brushes.White, 0, 0, lnNewWidth, lnNewHeight);
        g.DrawImage(loBMP, 0, 0, lnNewWidth, lnNewHeight);

        loBMP.Dispose();
        
        return bmpOut;
    }    
</script>