Photo Upload Page Code.

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Drawing.Imaging;
using System.Drawing;

public partial class admin_Default2 : System.Web.UI.Page
{
    /// <summary>
    /// Creates a Thumbnail bitmap of any image file (jpg or bmp).
    /// </summary>
    /// <param name="lcFilename">Filename to load</param>
    /// <param name="lnWidth">desired width after resize</param>
    /// <param name="lnHeight">desired height after resize</param>
    /// <returns>the bitmap image after resize</returns>
    protected Bitmap CreateThumbnail(string lcFilename, int lnWidth, int lnHeight)
    {
        System.Drawing.Bitmap bmpOut = null;
        try
        {
            Bitmap loBMP = new Bitmap(lcFilename);
            ImageFormat loFormat = loBMP.RawFormat;

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

            //if the image is smaller than the tn - just return it.
            if (loBMP.Width < lnWidth && loBMP.Height < lnHeight)
                return loBMP;

            //if landscape, calc new width/height
            if (loBMP.Width > loBMP.Height)
            {
                lnRatio = (decimal)lnWidth / loBMP.Width;
                lnNewWidth = lnWidth;
                decimal lnTemp = loBMP.Height * lnRatio;
                lnNewHeight = (int)lnTemp;
            }
            //if portrait, calc new height/width
            else
            {
                lnRatio = (decimal)lnHeight / loBMP.Height;
                lnNewHeight = lnHeight;
                decimal lnTemp = loBMP.Width * lnRatio;
                lnNewWidth = (int)lnTemp;
            }
            string s = string.Format("{0} changed from {1}x{2} to {3}x{4}<br />\n", lcFilename, loBMP.Width, loBMP.Height, lnNewWidth, lnNewHeight);

            //create output bitmap.
            bmpOut = new Bitmap(lnNewWidth, lnNewHeight);
            Graphics g = Graphics.FromImage(bmpOut);
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
            g.FillRectangle(Brushes.White, 0, 0, lnNewWidth, lnNewHeight);
            g.DrawImage(loBMP, 0, 0, lnNewWidth, lnNewHeight);
            loBMP.Dispose();
        }
        catch
        {
            return null;
        }
        return bmpOut;
    }


    protected void Page_Load(object sender, EventArgs e)
    {

    }


    /// <summary>
    /// Creates the Thumbnail views
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Photos_Init(object sender, EventArgs e)
    {
        string localpath = Server.MapPath("~/Photos");
        string[] photos = Directory.GetFiles(localpath, "*.jpg");

        TableRow newrow = new TableRow();

        foreach (string photo in photos)
        {
            //create the cell containing the photo and it's options
            TableCell thisphoto = new TableCell();
            //image
            System.Web.UI.WebControls.Image thisimage = new System.Web.UI.WebControls.Image();
            thisimage.ImageUrl = "~/photos/tn/" + Path.GetFileName(photo);
            thisimage.Width = 200;
            thisphoto.Controls.Add(thisimage);

            //caption
            TextBox tb = new TextBox();
            tb.AutoPostBack = true;
            tb.Height = new Unit(100, UnitType.Pixel);
            tb.Width = new Unit(200, UnitType.Pixel);
            tb.Init += new EventHandler(captiontext_init);
            tb.TextChanged += new EventHandler(captiontext_TextChanged);
            tb.TextMode = TextBoxMode.MultiLine;
            string shortcaptionfilename = Path.GetFileName( Path.ChangeExtension(photo, ".txt"));

            tb.ToolTip = shortcaptionfilename;

            string textfilename = Server.MapPath("~/Photos/captions/") + Path.GetFileName(photo);
            textfilename = Path.ChangeExtension(textfilename, ".txt");

            if (File.Exists(textfilename))
            {
                tb.Text = File.ReadAllText(textfilename);
            }
            thisphoto.Controls.Add(new LiteralControl("<br />"));
            thisphoto.Controls.Add(tb);

            thisphoto.Controls.Add(new LiteralControl("<br />"));

            //link
            HyperLink link = new HyperLink();
            link.CssClass = "bluetext";
            link.Text = "../photos/" + Path.GetFileName(photo);
            link.NavigateUrl = link.Text;
            link.Target = "pic";
            link.Font.Size = FontUnit.Small;
            thisphoto.Controls.Add(new LiteralControl("<br />"));
            thisphoto.Controls.Add(link);

            //delete button
            thisphoto.Controls.Add(new LiteralControl("<br />"));
            Button delete_me = new Button();
            delete_me.Text = "delete";
            delete_me.ID = string.Format("{0}", Path.GetFileName(photo));
            delete_me.CommandArgument = string.Format("{0}", Path.GetFileName(photo));
            delete_me.Click += Delete_Click;
            thisphoto.Controls.Add(delete_me);
            thisphoto.Controls.Add(new LiteralControl("<br /><br /><br /><br />"));

            if (newrow.Cells.Count > 2)
            {
                Photos.Rows.Add(newrow);  //add to table
                newrow = new TableRow();  //create a new row
            }
            newrow.Cells.Add(thisphoto);
            if (newrow.Cells.Count > 0)
            {
                Photos.Rows.Add(newrow);
            }
        }
    }


    protected void Resize_Photo(string rawfilename, string webfilename)
    {
        string photo = rawfilename;
        string tn = Server.MapPath("~/photos/tn/") + Path.GetFileName(rawfilename);
        if (System.IO.File.Exists(photo) == true)
        {
            //make the "full size" image from the megapixel that was uploaded
            Bitmap myBitmap = CreateThumbnail(photo, 600, 450);
            myBitmap.Save(webfilename);

            //make the thumbnail image
            Bitmap myThumbnail = CreateThumbnail(photo, 86, 64);
            myThumbnail.Save(tn);
        }
    }

    /// <summary>
    /// Deletes the specified photo
    /// </summary>
    /// <param name="filename">the filename to delete.</param>
    protected void Delete_Photo(string filename)
    {
        string photo = Server.MapPath("~/photos/") + filename;
        string tn = Server.MapPath("~/photos/tn/") + filename;
        if (System.IO.File.Exists(photo))
        {
            System.IO.File.Delete(photo);
        }
        if (System.IO.File.Exists(tn))
        {
            System.IO.File.Delete(tn);
        }
    }

    /// <summary>
    /// Delete button handler
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Delete_Click(object sender, EventArgs e)
    {
        string filename = (sender as Button).CommandArgument;
        Delete_Photo(filename);
        Response.Redirect(Request.Url.LocalPath);
    }


    /// <summary>
    /// The Upload button handler
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Button1_Click(object sender, EventArgs e)
    {
        string rawphotodir = Server.MapPath("~/Photos/raw");
        string photodir = Server.MapPath("~/Photos");
        string captiondir = Server.MapPath("~/Photos/captions");

        FileUpload[] fuArray = { FileUpload1, FileUpload2, FileUpload3, FileUpload4 };
        TextBox[] CapArray = { Caption1, Caption2, Caption3, Caption4 };


        for (int i = 0; i < 4; i++)
        //foreach (FileUpload fu in fuArray)
        {
            string filename = fuArray[i].FileName;
            if (Path.GetExtension(filename).ToLower() == ".jpg")
            {
                string savefilename = string.Format(@"{0}\{1}", rawphotodir, Path.GetFileName(filename));
                string webfilename = string.Format(@"{0}\{1}", photodir, Path.GetFileName(filename));
                fuArray[i].SaveAs(savefilename);//full sized
                Resize_Photo(savefilename, webfilename);
                //caps
                string capfilename = Path.ChangeExtension(filename, ".txt");
                string fullcapfilename = string.Format(@"{0}\{1}", captiondir, Path.GetFileName(capfilename));
                string captiontext = CapArray[i].Text;

                TextWriter tw = new StreamWriter(fullcapfilename);
                tw.Write(captiontext);
                tw.Flush();
                tw.Close();
            }
        }
        Response.Redirect(Request.Url.LocalPath);
    }

    /// <summary>
    /// set up the caption
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void captiontext_init(object sender, EventArgs e)
    {
        TextBox tb = (sender as TextBox);
        string filename = Server.MapPath("~/photos/captions/") + tb.ToolTip; //file.txt
        if (File.Exists(filename))
        {
            tb.Text = File.ReadAllText(filename);
        }
    }


    protected void captiontext_TextChanged(object sender, EventArgs e)
    {
        TextBox tb = (sender as TextBox);
        string filename = Server.MapPath("~/photos/captions/") + tb.ToolTip; //file.txt
        //  tb.Text = File.ReadAllText(filename);
        File.WriteAllText(filename, tb.Text);
    }
}