Resize/Shrink Photos for Web Development

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace ImageShrinker
{
    public partial class Page : UserControl
    {
        double originalWidth = 426, originalHeight = 124; // size of InitialImage.jpg
        private FileInfo currentFile;

        public Page()
        {
            InitializeComponent();
            resizePanel.Width = originalWidth;
            resizePanel.Height = originalHeight;
            slider.Value = 1000;
            displayImageSize();
        }

        private void slider_MouseMove(object sender, MouseEventArgs e)
        {
            UpdateSize();
        }

        private void UpdateSize()
        {
            resizePanel.Width = (slider.Value / 1000) * originalWidth;
            displayImageSize();
        }

        private void displayImageSize()
        {
            string strWidth = resizePanel.Width.ToString("F0");
            string strHeight = ((slider.Value / 1000) * originalHeight).ToString("F0");
            sliderToolTip.Text = String.Format("{0} x {1}", strWidth, strHeight);
            object[] paramArray = new object[1];
            paramArray[0] = sliderToolTip.Text;
            try
            {
                System.Windows.Browser.HtmlPage.Window.Invoke("updateStatus", paramArray);
            }
            catch (InvalidOperationException)
            {
                MessageBox.Show("Failure to call JavaScript function updateStatus(). Did you open the proper page?\nIn Visual Studio, did you set the Web project as StartUp project and set the Start Page?", "Wrong page", MessageBoxButton.OK);
            }
        }

        private void btnLoad_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "Image Files (*.png;*.jpg)|*.png;*.jpg|All files (*.*)|*.*";
            ofd.FilterIndex = 1;
            ofd.Multiselect = false;

            if (ofd.ShowDialog() == true)
            {
                currentFile = ofd.File;
                int fileSize = Convert.ToInt32(currentFile.Length);
                tbxFileName.Text = currentFile.Name;
                btnSave.IsEnabled = true;

                using (FileStream stream = currentFile.OpenRead())
                {
                    byte[] buffer = new byte[currentFile.Length];
                    stream.Read(buffer, 0, (int)currentFile.Length);
                    string imageData = Convert.ToBase64String(buffer);
                    WebClient wc = new WebClient();
                    wc.UploadStringCompleted += new UploadStringCompletedEventHandler(wc_UploadStringCompleted);
                    wc.UploadStringAsync(new Uri("getsize.ashx", UriKind.Relative), imageData);

                    resizePanel.Visibility = Visibility.Collapsed;
                    BitmapImage bi = new BitmapImage();
                    bi.SetSource(stream);
                    image.Source = bi;
                    slider.Value = 1000;
                }
            }
        }

        void wc_UploadStringCompleted(object sender, UploadStringCompletedEventArgs e)
        {
            string size = e.Result;
            string[] part = size.Split(new char[] { ',' });
            resizePanel.Width = Convert.ToInt32(part[0]);
            resizePanel.Height = Convert.ToInt32(part[1]);
            resizePanel.Visibility = Visibility.Visible;
            originalWidth = resizePanel.Width;
            originalHeight = resizePanel.Height;
            displayImageSize();
        }

        private void btnSave_Click(object sender, RoutedEventArgs e)
        {
            double width = image.ActualWidth;

            string imageData = null;
            using (FileStream stream = currentFile.OpenRead())
            {
                byte[] buffer = new byte[currentFile.Length];
                stream.Read(buffer, 0, (int)currentFile.Length);
                imageData = Convert.ToBase64String(buffer);
            }

            object[] paramArray = new object[3];
            paramArray[0] = imageData;
            paramArray[1] = slider.Value / 1000;
            paramArray[2] = tbxFileName.Text.Trim();
            System.Windows.Browser.HtmlPage.Window.Invoke("echo", paramArray);
        }

        private void slider_KeyUp(object sender, KeyEventArgs e)
        {
            switch (e.Key)
            {
                case Key.Left:
                    if (slider.Value > 0)
                    {
                        slider.Value = slider.Value - 1;
                    }
                    break;
                case Key.Right:
                    if (slider.Value < 1000)
                    {
                        slider.Value = slider.Value + 1;
                    }
                    break;
            }
            UpdateSize();
        }
    }
}